X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=backend.c;h=88fed007fc8ad26bd8318b4cf06ba4de3cd10cee;hb=55cafba6c2f03dec96d41f7a85c03d4cd641190a;hp=48a32a457c062a959d4c064875d0cce9469dbc5a;hpb=47c460336f44f19dd12fcc72234ba541faa02dd6;p=xboard.git

diff --git a/backend.c b/backend.c
index 48a32a4..88fed00 100644
--- a/backend.c
+++ b/backend.c
@@ -5,7 +5,7 @@
  * Massachusetts.
  *
  * Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006,
- * 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+ * 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
  *
  * Enhancements Copyright 2005 Alessandro Scotti
  *
@@ -55,14 +55,32 @@
 #ifdef WIN32
 #include <windows.h>
 
-int flock(int f, int code);
-#define LOCK_EX 2
-#define SLASH '\\'
+    int flock(int f, int code);
+#   define LOCK_EX 2
+#   define SLASH '\\'
+
+#   ifdef ARC_64BIT
+#       define EGBB_NAME "egbbdll64.dll"
+#   else
+#       define EGBB_NAME "egbbdll.dll"
+#   endif
 
 #else
 
-#include <sys/file.h>
-#define SLASH '/'
+#   include <sys/file.h>
+#   define SLASH '/'
+
+#   include <dlfcn.h>
+#   ifdef ARC_64BIT
+#       define EGBB_NAME "egbbso64.so"
+#   else
+#       define EGBB_NAME "egbbso.so"
+#   endif
+    // kludge to allow Windows code in back-end by converting it to corresponding Linux code 
+#   define CDECL
+#   define HMODULE void *
+#   define LoadLibrary(x) dlopen(x, RTLD_LAZY)
+#   define GetProcAddress dlsym
 
 #endif
 
@@ -130,6 +148,7 @@ extern int gettimeofday(struct timeval *, struct timezone *);
 #endif
 #include "backendz.h"
 #include "evalgraph.h"
+#include "engineoutput.h"
 #include "gettext.h"
 
 #ifdef ENABLE_NLS
@@ -225,14 +244,13 @@ void DisplayTwoMachinesTitle P(());
 static void ExcludeClick P((int index));
 void ToggleSecond P((void));
 void PauseEngine P((ChessProgramState *cps));
-static int NonStandardBoardSize P((void));
+static int NonStandardBoardSize P((VariantClass v, int w, int h, int s));
 
 #ifdef WIN32
        extern void ConsoleCreate();
 #endif
 
 ChessProgramState *WhitePlayer();
-void InsertIntoMemo P((int which, char *text)); // [HGM] kibitz: in engineo.c
 int VerifyDisplayMode P(());
 
 char *GetInfoFromComment( int, char * ); // [HGM] PV time: returns stripped comment
@@ -271,10 +289,12 @@ int chattingPartner;
 char marker[BOARD_RANKS][BOARD_FILES]; /* [HGM] marks for target squares */
 char legal[BOARD_RANKS][BOARD_FILES];  /* [HGM] legal target squares */
 char lastMsg[MSG_SIZ];
+char lastTalker[MSG_SIZ];
 ChessSquare pieceSweep = EmptySquare;
 ChessSquare promoSweep = EmptySquare, defaultPromoChoice;
 int promoDefaultAltered;
 int keepInfo = 0; /* [HGM] to protect PGN tags in auto-step game analysis */
+static int initPing = -1;
 
 /* States for ics_getting_history */
 #define H_FALSE 0
@@ -396,6 +416,7 @@ PosFlags (index)
   default:
     break;
   }
+  if(appData.fischerCastling) flags |= F_FRC_TYPE_CASTLING, flags &= ~F_ALL_CASTLE_OK; // [HGM] fischer
   return flags;
 }
 
@@ -617,6 +638,13 @@ ChessSquare GrandArray[2][BOARD_FILES] = {
         BlackMarshall, BlackAngel, BlackBishop, BlackKnight, EmptySquare }
 };
 
+ChessSquare ChuChessArray[2][BOARD_FILES] = {
+    { WhiteMan, WhiteKnight, WhiteBishop, WhiteCardinal, WhiteLion,
+        WhiteQueen, WhiteDragon, WhiteBishop, WhiteKnight, WhiteMan },
+    { BlackMan, BlackKnight, BlackBishop, BlackDragon, BlackQueen,
+        BlackLion, BlackCardinal, BlackBishop, BlackKnight, BlackMan }
+};
+
 #ifdef GOTHIC
 ChessSquare GothicArray[2][BOARD_FILES] = {
     { WhiteRook, WhiteKnight, WhiteBishop, WhiteQueen, WhiteMarshall,
@@ -751,8 +779,7 @@ UnloadEngine (ChessProgramState *cps)
 	    ExitAnalyzeMode();
             DoSleep( appData.delayBeforeQuit );
 	    SendToProgram("quit\n", cps);
-            DoSleep( appData.delayAfterQuit );
-	    DestroyChildProcess(cps->pr, cps->useSigterm);
+	    DestroyChildProcess(cps->pr, 4 + cps->useSigterm);
 	}
 	cps->pr = NoProc;
 	if(appData.debugMode) fprintf(debugFP, "Unload %s\n", cps->which);
@@ -820,6 +847,7 @@ InitEngine (ChessProgramState *cps, int n)
     cps->analyzing = FALSE;
     cps->initDone = FALSE;
     cps->reload = FALSE;
+    cps->pseudo = appData.pseudo[n];
 
     /* New features added by Tord: */
     cps->useFEN960 = FALSE;
@@ -837,6 +865,7 @@ InitEngine (ChessProgramState *cps, int n)
     /* [HGM] debug */
     cps->debug = FALSE;
 
+    cps->drawDepth = appData.drawDepth[n];
     cps->supportsNPS = UNKNOWN;
     cps->memSize = FALSE;
     cps->maxCores = FALSE;
@@ -1203,6 +1232,7 @@ InitBackEnd1 ()
       case VariantGrand:      /* should work */
       case VariantSpartan:    /* should work */
       case VariantLion:       /* should work */
+      case VariantChuChess:   /* should work */
 	break;
       }
     }
@@ -1555,6 +1585,23 @@ InitBackEnd3 P((void))
     char buf[MSG_SIZ];
     int err, len;
 
+    if(!appData.icsActive && !appData.noChessProgram && !appData.matchMode &&                         // mode involves only first engine
+       !strcmp(appData.variant, "normal") &&                                                          // no explicit variant request
+        appData.NrRanks == -1 && appData.NrFiles == -1 && appData.holdingsSize == -1 &&               // no size overrides requested
+       !SupportedVariant(first.variants, VariantNormal, 8, 8, 0, first.protocolVersion, "") &&        // but 'normal' won't work with engine
+       !SupportedVariant(first.variants, VariantFischeRandom, 8, 8, 0, first.protocolVersion, "") ) { // nor will Chess960
+	char c, *q = first.variants, *p = strchr(q, ',');
+	if(p) *p = NULLCHAR;
+	if(StringToVariant(q) != VariantUnknown) { // the engine can play a recognized variant, however
+	    int w, h, s;
+	    if(sscanf(q, "%dx%d+%d_%c", &w, &h, &s, &c) == 4) // get size overrides the engine needs with it (if any)
+		appData.NrFiles = w, appData.NrRanks = h, appData.holdingsSize = s, q = strchr(q, '_') + 1;
+	    ASSIGN(appData.variant, q); // fake user requested the first variant played by the engine
+	    Reset(TRUE, FALSE);         // and re-initialize
+	}
+	if(p) *p = ',';
+    }
+
     InitChessProgram(&first, startedFromSetupPosition);
 
     if(!appData.noChessProgram) {  /* [HGM] tidy: redo program version to use name from myname feature */
@@ -2067,7 +2114,8 @@ StringToVariant (char *e)
 	found = TRUE;
     } else
     for (i=0; i<sizeof(variantNames)/sizeof(char*); i++) {
-      if (StrCaseStr(e, variantNames[i])) {
+      if (p = StrCaseStr(e, variantNames[i])) {
+	if(p && i >= VariantShogi && isalpha(p[strlen(variantNames[i])])) continue;
 	v = (VariantClass) i;
 	found = TRUE;
 	break;
@@ -2783,7 +2831,7 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
     int backup;    /* [DM] For zippy color lines */
     char *p;
     char talker[MSG_SIZ]; // [HGM] chat
-    int channel;
+    int channel, collective=0;
 
     connectionAlive = TRUE; // [HGM] alive: I think, therefore I am...
 
@@ -3025,8 +3073,18 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 			char mess[MSG_SIZ];
 			snprintf(mess, MSG_SIZ, "%s%s", talker, parse);
 			OutputChatMessage(chattingPartner, mess);
+			if(collective == 1) { // broadcasted talk also goes to private chatbox of talker
+			    int p;
+			    talker[strlen(talker+1)-1] = NULLCHAR; // strip closing delimiter
+			    for(p=0; p<MAX_CHAT; p++) if(!StrCaseCmp(talker+1, chatPartner[p])) {
+				snprintf(mess, MSG_SIZ, "%s: %s", chatPartner[chattingPartner], parse);
+				OutputChatMessage(p, mess);
+				break;
+			    }
+			}
 			chattingPartner = -1;
-			next_out = i+1; // [HGM] suppress printing in ICS window
+			if(collective != 3) next_out = i+1; // [HGM] suppress printing in ICS window
+			collective = 0;
 		    } else
 		    if(!suppressKibitz) // [HGM] kibitz
 			AppendComment(forwardMostMove, StripHighlight(parse), TRUE);
@@ -3242,18 +3300,20 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 					   looking_at(buf, &i, "*(*)(*)(*)(*):") && sscanf(star_match[4], "%d", &channel) == 1 )) {
 		int p;
 		sscanf(star_match[0], "%[^(]", talker+1); // strip (C) or (U) off ICS handle
-		chattingPartner = -1;
+		chattingPartner = -1; collective = 0;
 
 		if(channel >= 0) // channel broadcast; look if there is a chatbox for this channel
 		for(p=0; p<MAX_CHAT; p++) {
+		    collective = 1;
 		    if(chatPartner[p][0] >= '0' && chatPartner[p][0] <= '9' && channel == atoi(chatPartner[p])) {
 		    talker[0] = '['; strcat(talker, "] ");
-		    Colorize(channel == 1 ? ColorChannel1 : ColorChannel, FALSE);
+		    Colorize((channel == 1 ? ColorChannel1 : ColorChannel), FALSE);
 		    chattingPartner = p; break;
 		    }
 		} else
 		if(buf[i-3] == 'e') // kibitz; look if there is a KIBITZ chatbox
 		for(p=0; p<MAX_CHAT; p++) {
+		    collective = 1;
 		    if(!strcmp("kibitzes", chatPartner[p])) {
 			talker[0] = '['; strcat(talker, "] ");
 			chattingPartner = p; break;
@@ -3261,6 +3321,7 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 		} else
 		if(buf[i-3] == 'r') // whisper; look if there is a WHISPER chatbox
 		for(p=0; p<MAX_CHAT; p++) {
+		    collective = 1;
 		    if(!strcmp("whispers", chatPartner[p])) {
 			talker[0] = '['; strcat(talker, "] ");
 			chattingPartner = p; break;
@@ -3269,6 +3330,7 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 		if(buf[i-3] == 't' || buf[oldi+2] == '>') {// shout, c-shout or it; look if there is a 'shouts' chatbox
 		  if(buf[i-8] == '-' && buf[i-3] == 't')
 		  for(p=0; p<MAX_CHAT; p++) { // c-shout; check if dedicatesd c-shout box exists
+		    collective = 1;
 		    if(!strcmp("c-shouts", chatPartner[p])) {
 			talker[0] = '('; strcat(talker, ") "); Colorize(ColorSShout, FALSE);
 			chattingPartner = p; break;
@@ -3276,6 +3338,7 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 		  }
 		  if(chattingPartner < 0)
 		  for(p=0; p<MAX_CHAT; p++) {
+		    collective = 1;
 		    if(!strcmp("shouts", chatPartner[p])) {
 			if(buf[oldi+2] == '>') { talker[0] = '<'; strcat(talker, "> "); Colorize(ColorShout, FALSE); }
 			else if(buf[i-8] == '-') { talker[0] = '('; strcat(talker, ") "); Colorize(ColorSShout, FALSE); }
@@ -3286,18 +3349,23 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 		}
 		if(chattingPartner<0) // if not, look if there is a chatbox for this indivdual
 		for(p=0; p<MAX_CHAT; p++) if(!StrCaseCmp(talker+1, chatPartner[p])) {
-		    talker[0] = 0; Colorize(ColorTell, FALSE);
+		    talker[0] = 0;
+		    Colorize(ColorTell, FALSE);
+		    if(collective) safeStrCpy(talker, "broadcasts: ", MSG_SIZ);
+		    collective |= 2;
 		    chattingPartner = p; break;
 		}
-		if(chattingPartner<0) i = oldi; else {
+		if(chattingPartner<0) i = oldi, safeStrCpy(lastTalker, talker+1, MSG_SIZ); else {
 		    Colorize(curColor, TRUE); // undo the bogus colorations we just made to trigger the souds
-		    if(oldi > 0 && buf[oldi-1] == '\n') oldi--;
-		    if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
 		    started = STARTED_COMMENT;
 		    parse_pos = 0; parse[0] = NULLCHAR;
 		    savingComment = 3 + chattingPartner; // counts as TRUE
-		    suppressKibitz = TRUE;
-		    continue;
+		    if(collective == 3) i = oldi; else {
+			suppressKibitz = TRUE;
+			if(oldi > 0 && buf[oldi-1] == '\n') oldi--;
+			if (oldi > next_out) SendToPlayer(&buf[next_out], oldi - next_out);
+			continue;
+		    }
 		}
 	    } // [HGM] chat: end of patch
 
@@ -3381,7 +3449,7 @@ read_from_ics (InputSourceRef isr, VOIDSTAR closure, char *data, int count, int
 		      parse[parse_pos] = NULLCHAR;
 		      started = STARTED_COMMENT;
 		      savingComment = TRUE;
-		    } else {
+		    } else if(collective != 3) {
 		      started = STARTED_CHATTER;
 		      savingComment = FALSE;
 		    }
@@ -4786,7 +4854,7 @@ ParseBoard12 (char *string)
 	      default:
 		break;
 	      case MT_CHECK:
-                if(gameInfo.variant != VariantShogi)
+                if(!IS_SHOGI(gameInfo.variant))
                     strcat(parseList[moveNum - 1], "+");
 		break;
 	      case MT_CHECKMATE:
@@ -5016,6 +5084,11 @@ SendMoveToProgram (int moveNum, ChessProgramState *cps)
     char buf[MSG_SIZ];
 
     if(moveList[moveNum][1] == '@' && moveList[moveNum][0] == '@') {
+	if(gameInfo.variant == VariantLion || gameInfo.variant == VariantChuChess || gameInfo.variant == VariantChu) {
+	    sprintf(buf, "%s@@@@\n", cps->useUsermove ? "usermove " : "");
+	    SendToProgram(buf, cps);
+	    return;
+	}
 	// null move in variant where engine does not understand it (for analysis purposes)
 	SendBoard(cps, moveNum + 1); // send position after move in stead.
 	return;
@@ -5043,8 +5116,7 @@ SendMoveToProgram (int moveNum, ChessProgramState *cps)
       /* Added by Tord: Send castle moves in "O-O" in FRC games if required by
        * the engine. It would be nice to have a better way to identify castle
        * moves here. */
-      if((gameInfo.variant == VariantFischeRandom || gameInfo.variant == VariantCapaRandom)
-									 && cps->useOOCastle) {
+      if(appData.fischerCastling && cps->useOOCastle) {
         int fromX = moveList[moveNum][0] - AAA;
         int fromY = moveList[moveNum][1] - ONE;
         int toX = moveList[moveNum][2] - AAA;
@@ -5058,16 +5130,18 @@ SendMoveToProgram (int moveNum, ChessProgramState *cps)
 	}
 	else SendToProgram(moveList[moveNum], cps);
       } else
+      if(moveList[moveNum][4] == ';') { // [HGM] lion: move is double-step over intermediate square
+	  snprintf(buf, MSG_SIZ, "%c%d%c%d,%c%d%c%d\n", moveList[moveNum][0], moveList[moveNum][1] - '0', // convert to two moves
+					       moveList[moveNum][5], moveList[moveNum][6] - '0',
+					       moveList[moveNum][5], moveList[moveNum][6] - '0',
+					       moveList[moveNum][2], moveList[moveNum][3] - '0');
+	  SendToProgram(buf, cps);
+      } else
       if(BOARD_HEIGHT > 10) { // [HGM] big: convert ranks to double-digit where needed
 	if(moveList[moveNum][1] == '@' && (BOARD_HEIGHT < 16 || moveList[moveNum][0] <= 'Z')) { // drop move
 	  if(moveList[moveNum][0]== '@') snprintf(buf, MSG_SIZ, "@@@@\n"); else
 	  snprintf(buf, MSG_SIZ, "%c@%c%d%s", moveList[moveNum][0],
 					      moveList[moveNum][2], moveList[moveNum][3] - '0', moveList[moveNum]+4);
-	} else if(moveList[moveNum][4] == ';') { // [HGM] lion: move is double-step over intermediate square
-	  snprintf(buf, MSG_SIZ, "%c%d%c%d,%c%d%c%d\n", moveList[moveNum][0], moveList[moveNum][1] - '0', // convert to two moves
-					       moveList[moveNum][5], moveList[moveNum][6] - '0',
-					       moveList[moveNum][5], moveList[moveNum][6] - '0',
-					       moveList[moveNum][2], moveList[moveNum][3] - '0');
 	} else
 	  snprintf(buf, MSG_SIZ, "%c%d%c%d%s", moveList[moveNum][0], moveList[moveNum][1] - '0',
 					       moveList[moveNum][2], moveList[moveNum][3] - '0', moveList[moveNum]+4);
@@ -5277,28 +5351,43 @@ ProcessICSInitScript (FILE *f)
 }
 
 
-static int lastX, lastY, lastLeftX, lastLeftY, selectFlag, dragging;
+static int lastX, lastY, lastLeftX, lastLeftY, selectFlag;
+int dragging;
 static ClickType lastClickType;
 
+int
+Partner (ChessSquare *p)
+{ // change piece into promotion partner if one shogi-promotes to the other
+  int stride = gameInfo.variant == VariantChu ? 22 : 11;
+  ChessSquare partner;
+  partner = (*p/stride & 1 ? *p - stride : *p + stride);
+  if(PieceToChar(*p) != '+' && PieceToChar(partner) != '+') return 0;
+  *p = partner;
+  return 1;
+}
+
 void
 Sweep (int step)
 {
     ChessSquare king = WhiteKing, pawn = WhitePawn, last = promoSweep;
+    static int toggleFlag;
     if(gameInfo.variant == VariantKnightmate) king = WhiteUnicorn;
     if(gameInfo.variant == VariantSuicide || gameInfo.variant == VariantGiveaway) king = EmptySquare;
     if(promoSweep >= BlackPawn) king = WHITE_TO_BLACK king, pawn = WHITE_TO_BLACK pawn;
     if(gameInfo.variant == VariantSpartan && pawn == BlackPawn) pawn = BlackLance, king = EmptySquare;
-    if(fromY != BOARD_HEIGHT-2 && fromY != 1) pawn = EmptySquare;
+    if(fromY != BOARD_HEIGHT-2 && fromY != 1 && gameInfo.variant != VariantChuChess) pawn = EmptySquare;
+    if(!step) toggleFlag = Partner(&last); // piece has shogi-promotion
     do {
-	promoSweep -= step;
+	if(step && !(toggleFlag && Partner(&promoSweep))) promoSweep -= step;
 	if(promoSweep == EmptySquare) promoSweep = BlackPawn; // wrap
 	else if((int)promoSweep == -1) promoSweep = WhiteKing;
 	else if(promoSweep == BlackPawn && step < 0) promoSweep = WhitePawn;
 	else if(promoSweep == WhiteKing && step > 0) promoSweep = BlackKing;
 	if(!step) step = -1;
     } while(PieceToChar(promoSweep) == '.' || PieceToChar(promoSweep) == '~' || promoSweep == pawn ||
-	    appData.testLegality && (promoSweep == king || promoSweep == WhiteLion || promoSweep == BlackLion) ||
-	    IS_SHOGI(gameInfo.variant) && promoSweep != CHUPROMOTED last && last != CHUPROMOTED promoSweep && last != promoSweep);
+	    !toggleFlag && PieceToChar(promoSweep) == '+' || // skip promoted versions of other
+	    appData.testLegality && (promoSweep == king || gameInfo.variant != VariantChuChess &&
+            (promoSweep == WhiteLion || promoSweep == BlackLion)));
     if(toX >= 0) {
 	int victim = boards[currentMove][toY][toX];
 	boards[currentMove][toY][toX] = promoSweep;
@@ -5402,6 +5491,7 @@ ParseOneMove (char *move, int moveNum, ChessMove *moveType, int *fromX, int *fro
       case WhiteNonPromotion:
       case BlackNonPromotion:
       case NormalMove:
+      case FirstLeg:
       case WhiteCapturesEnPassant:
       case BlackCapturesEnPassant:
       case WhiteKingSideCastle:
@@ -5435,7 +5525,8 @@ ParseOneMove (char *move, int moveNum, ChessMove *moveType, int *fromX, int *fro
 	if (appData.testLegality) {
 	  return (*moveType != IllegalMove);
 	} else {
-	  return !(*fromX == *toX && *fromY == *toY) && boards[moveNum][*fromY][*fromX] != EmptySquare &&
+	  return !(*fromX == *toX && *fromY == *toY && killX < 0) && boards[moveNum][*fromY][*fromX] != EmptySquare &&
+			 // [HGM] lion: if this is a double move we are less critical
 			WhiteOnMove(moveNum) == (boards[moveNum][*fromY][*fromX] < BlackPawn);
 	}
 
@@ -5578,6 +5669,9 @@ LoadMultiPV (int x, int y, char *buf, int index, int *start, int *end, int pane)
 	} else if(strstr(buf+lineStart, "exclude:") == buf+lineStart) { // exclude moves clicked
 		ExcludeClick(origIndex - lineStart);
 		return FALSE;
+	} else if(!strncmp(buf+lineStart, "dep\t", 4)) {                // column headers clicked
+		Collapse(origIndex - lineStart);
+		return FALSE;
 	}
 	ParsePV(buf+startPV, FALSE, gameMode != AnalyzeMode);
 	*start = startPV; *end = index-1;
@@ -5899,7 +5993,7 @@ InitPosition (int redraw)
     oldh = gameInfo.holdingsWidth;
     static int oldv;
 
-    if(appData.icsActive) shuffleOpenings = FALSE; // [HGM] shuffle: in ICS mode, only shuffle on ICS request
+    if(appData.icsActive) shuffleOpenings = appData.fischerCastling = FALSE; // [HGM] shuffle: in ICS mode, only shuffle on ICS request
 
     /* [AS] Initialize pv info list [HGM] and game status */
     {
@@ -5940,6 +6034,7 @@ InitPosition (int redraw)
     switch (gameInfo.variant) {
     case VariantFischeRandom:
       shuffleOpenings = TRUE;
+      appData.fischerCastling = TRUE;
     default:
       break;
     case VariantShatranj:
@@ -5970,6 +6065,7 @@ InitPosition (int redraw)
       break;
     case VariantCapaRandom:
       shuffleOpenings = TRUE;
+      appData.fischerCastling = TRUE;
     case VariantCapablanca:
       pieces = CapablancaArray;
       gameInfo.boardWidth = 10;
@@ -6043,6 +6139,12 @@ InitPosition (int redraw)
       pieces = lionArray;
       SetCharTable(pieceToChar, "PNBRQ................LKpnbrq................lk");
       break;
+    case VariantChuChess:
+      pieces = ChuChessArray;
+      gameInfo.boardWidth = 10;
+      gameInfo.boardHeight = 10;
+      SetCharTable(pieceToChar, "PNBRQ.....M.+++......LKpnbrq.....m.+++......lk");
+      break;
     case VariantFairy:
       pieces = fairyArray;
       SetCharTable(pieceToChar, "PNBRQFEACWMOHIJGDVLSUKpnbrqfeacwmohijgdvlsuk");
@@ -6097,7 +6199,8 @@ InitPosition (int redraw)
 
     pawnRow = gameInfo.boardHeight - 7; /* seems to work in all common variants */
     if(pawnRow < 1) pawnRow = 1;
-    if(gameInfo.variant == VariantMakruk || gameInfo.variant == VariantASEAN || gameInfo.variant == VariantGrand) pawnRow = 2;
+    if(gameInfo.variant == VariantMakruk || gameInfo.variant == VariantASEAN ||
+       gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess) pawnRow = 2;
     if(gameInfo.variant == VariantChu) pawnRow = 3;
 
     /* User pieceToChar list overrules defaults */
@@ -6112,7 +6215,7 @@ InitPosition (int redraw)
             initialPosition[i][j] = s;
 
         if(j < BOARD_LEFT || j >= BOARD_RGHT || overrule) continue;
-        initialPosition[gameInfo.variant == VariantGrand][j] = pieces[0][j-gameInfo.holdingsWidth];
+        initialPosition[gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess][j] = pieces[0][j-gameInfo.holdingsWidth];
         initialPosition[pawnRow][j] = WhitePawn;
         initialPosition[BOARD_HEIGHT-pawnRow-1][j] = gameInfo.variant == VariantSpartan ? BlackLance : BlackPawn;
         if(gameInfo.variant == VariantXiangqi) {
@@ -6134,14 +6237,15 @@ InitPosition (int redraw)
                initialPosition[BOARD_HEIGHT-1-i][j] =  pieces[2*i+1][j-gameInfo.holdingsWidth];
              }
         }
-        if(gameInfo.variant == VariantGrand) {
+        if(gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess) {
             if(j==BOARD_LEFT || j>=BOARD_RGHT-1) {
                initialPosition[0][j] = WhiteRook;
                initialPosition[BOARD_HEIGHT-1][j] = BlackRook;
             }
         }
-        initialPosition[BOARD_HEIGHT-1-(gameInfo.variant == VariantGrand)][j] =  pieces[1][j-gameInfo.holdingsWidth];
+        initialPosition[BOARD_HEIGHT-1-(gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess)][j] =  pieces[1][j-gameInfo.holdingsWidth];
     }
+    if(gameInfo.variant == VariantChuChess) initialPosition[0][BOARD_WIDTH/2] = WhiteKing, initialPosition[BOARD_HEIGHT-1][BOARD_WIDTH/2-1] = BlackKing;
     if( (gameInfo.variant == VariantShogi) && !overrule ) {
 
             j=BOARD_LEFT+1;
@@ -6419,7 +6523,7 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
     /* [HGM] rewritten IsPromotion to only flag promotions that offer a choice */
     /* [HGM] add Shogi promotions */
     int promotionZoneSize=1, highestPromotingPiece = (int)WhitePawn;
-    ChessSquare piece;
+    ChessSquare piece, partner;
     ChessMove moveType;
     Boolean premove;
 
@@ -6435,15 +6539,15 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
         int p = piece >= BlackPawn ? BLACK_TO_WHITE piece : piece;
         promotionZoneSize = BOARD_HEIGHT/3;
         highestPromotingPiece = (p >= WhiteLion || PieceToChar(piece + 22) == '.') ? WhitePawn : WhiteLion;
-    } else if(gameInfo.variant == VariantShogi) {
+    } else if(gameInfo.variant == VariantShogi || gameInfo.variant == VariantChuChess) {
         promotionZoneSize = BOARD_HEIGHT/3;
         highestPromotingPiece = (int)WhiteAlfil;
-    } else if(gameInfo.variant == VariantMakruk || gameInfo.variant == VariantGrand) {
+    } else if(gameInfo.variant == VariantMakruk || gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess) {
         promotionZoneSize = 3;
     }
 
-    // Treat Lance as Pawn when it is not representing Amazon
-    if(gameInfo.variant != VariantSuper) {
+    // Treat Lance as Pawn when it is not representing Amazon or Lance
+    if(gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu) {
         if(piece == WhiteLance) piece = WhitePawn; else
         if(piece == BlackLance) piece = BlackPawn;
     }
@@ -6452,10 +6556,13 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
     if((int)piece >= BlackPawn) {
         if(toY >= promotionZoneSize && fromY >= promotionZoneSize)
              return FALSE;
+        if(fromY < promotionZoneSize && gameInfo.variant == VariantChuChess) return FALSE;
         highestPromotingPiece = WHITE_TO_BLACK highestPromotingPiece;
     } else {
         if(  toY < BOARD_HEIGHT - promotionZoneSize &&
            fromY < BOARD_HEIGHT - promotionZoneSize) return FALSE;
+        if(fromY >= BOARD_HEIGHT - promotionZoneSize && gameInfo.variant == VariantChuChess)
+             return FALSE;
     }
 
     if( (int)piece > highestPromotingPiece ) return FALSE; // non-promoting piece
@@ -6491,7 +6598,11 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
     // we either have a choice what to promote to, or (in Shogi) whether to promote
     if(gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier ||
        gameInfo.variant == VariantMakruk || gameInfo.variant == VariantASEAN) {
-	*promoChoice = PieceToChar(BlackFerz);  // no choice
+	ChessSquare p=BlackFerz;  // no choice
+	while(p < EmptySquare) {  //but make sure we use piece that exists
+	    *promoChoice = PieceToChar(p++);
+	    if(*promoChoice != '.') break;
+	}
 	return FALSE;
     }
     // no sense asking what we must promote to if it is going to explode...
@@ -6501,7 +6612,9 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
     }
     // give caller the default choice even if we will not make it
     *promoChoice = ToLower(PieceToChar(defaultPromoChoice));
-    if(IS_SHOGI(gameInfo.variant)) *promoChoice = (defaultPromoChoice == piece ? '=' : '+');
+    partner = piece; // pieces can promote if the pieceToCharTable says so
+    if(IS_SHOGI(gameInfo.variant)) *promoChoice = (defaultPromoChoice == piece && sweepSelect ? '=' : '+'); // obsolete?
+    else if(Partner(&partner))     *promoChoice = (defaultPromoChoice == piece && sweepSelect ? NULLCHAR : '+');
     if(        sweepSelect && gameInfo.variant != VariantGreat
 			   && gameInfo.variant != VariantGrand
 			   && gameInfo.variant != VariantSuper) return FALSE;
@@ -6512,7 +6625,8 @@ HasPromotionChoice (int fromX, int fromY, int toX, int toY, char *promoChoice, i
 	      gameMode == IcsPlayingBlack &&  WhiteOnMove(currentMove);
     if(appData.testLegality && !premove) {
 	moveType = LegalityTest(boards[currentMove], PosFlags(currentMove),
-			fromY, fromX, toY, toX, IS_SHOGI(gameInfo.variant) ? '+' : NULLCHAR);
+			fromY, fromX, toY, toX, IS_SHOGI(gameInfo.variant) || gameInfo.variant == VariantChuChess ? '+' : NULLCHAR);
+        if(moveType == IllegalMove) *promoChoice = NULLCHAR; // could be the fact we promoted was illegal
 	if(moveType != WhitePromotion && moveType  != BlackPromotion)
 	    return FALSE;
     }
@@ -6703,6 +6817,7 @@ int lastLoadGameUseList = FALSE;
 char lastLoadGameTitle[MSG_SIZ], lastLoadPositionTitle[MSG_SIZ];
 ChessMove lastLoadGameStart = EndOfFile;
 int doubleClick;
+Boolean addToBookFlag;
 
 void
 UserMoveEvent(int fromX, int fromY, int toX, int toY, int promoChar)
@@ -6882,6 +6997,16 @@ UserMoveEvent(int fromX, int fromY, int toX, int toY, int promoChar)
 	return;
     }
 
+    if(addToBookFlag) { // adding moves to book
+	char buf[MSG_SIZ], move[MSG_SIZ];
+        CoordsToAlgebraic(boards[currentMove], PosFlags(currentMove), fromY, fromX, toY, toX, promoChar, move);
+	snprintf(buf, MSG_SIZ, "  0.0%%     1  %s\n", move);
+	AddBookMove(buf);
+	addToBookFlag = FALSE;
+	ClearHighlights();
+	return;
+    }
+
     FinishMove(moveType, fromX, fromY, toX, toY, promoChar);
 }
 
@@ -7113,6 +7238,8 @@ MarkByFEN(char *fen)
 	DrawPosition(TRUE, NULL);
 }
 
+static char baseMarker[BOARD_RANKS][BOARD_FILES], baseLegal[BOARD_RANKS][BOARD_FILES];
+
 void
 Mark (Board board, int flags, ChessMove kind, int rf, int ff, int rt, int ft, VOIDSTAR closure)
 {
@@ -7125,12 +7252,15 @@ Mark (Board board, int flags, ChessMove kind, int rf, int ff, int rt, int ft, VO
     else if(flags & F_MANDATORY_CAPTURE && board[rt][ft] != EmptySquare) (*m)[rt][ft] = 3;
 }
 
+static int hoverSavedValid;
+
 void
 MarkTargetSquares (int clear)
 {
   int x, y, sum=0;
   if(clear) { // no reason to ever suppress clearing
     for(x=0; x<BOARD_WIDTH; x++) for(y=0; y<BOARD_HEIGHT; y++) sum += marker[y][x], marker[y][x] = 0;
+    hoverSavedValid = 0;
     if(!sum) return; // nothing was cleared,no redraw needed
   } else {
     int capt = 0;
@@ -7165,14 +7295,15 @@ ChessSquare gatingPiece = EmptySquare; // exported to front-end, for dragging
 int
 CanPromote (ChessSquare piece, int y)
 {
+        int zone = (gameInfo.variant == VariantChuChess ? 3 : 1);
 	if(gameMode == EditPosition) return FALSE; // no promotions when editing position
 	// some variants have fixed promotion piece, no promotion at all, or another selection mechanism
 	if(IS_SHOGI(gameInfo.variant)          || gameInfo.variant == VariantXiangqi ||
 	   gameInfo.variant == VariantSuper    || gameInfo.variant == VariantGreat   ||
 	   gameInfo.variant == VariantShatranj || gameInfo.variant == VariantCourier ||
          gameInfo.variant == VariantMakruk   || gameInfo.variant == VariantASEAN) return FALSE;
-	return (piece == BlackPawn && y == 1 ||
-		piece == WhitePawn && y == BOARD_HEIGHT-2 ||
+	return (piece == BlackPawn && y <= zone ||
+		piece == WhitePawn && y >= BOARD_HEIGHT-1-zone ||
 		piece == BlackLance && y == 1 ||
 		piece == WhiteLance && y == BOARD_HEIGHT-2 );
 }
@@ -7180,19 +7311,19 @@ CanPromote (ChessSquare piece, int y)
 void
 HoverEvent (int xPix, int yPix, int x, int y)
 {
-	static char baseMarker[BOARD_RANKS][BOARD_FILES], baseLegal[BOARD_RANKS][BOARD_FILES];
 	static int oldX = -1, oldY = -1, oldFromX = -1, oldFromY = -1;
 	int r, f;
-	if(dragging == 2) DragPieceMove(xPix, yPix); // [HGM] lion: drag without button for second leg
 	if(!first.highlight) return;
 	if(fromX != oldFromX || fromY != oldFromY)  oldX = oldY = -1; // kludge to fake entry on from-click
 	if(x == oldX && y == oldY) return; // only do something if we enter new square
 	oldFromX = fromX; oldFromY = fromY;
-	if(oldX == -1 && oldY == -1 && x == fromX && y == fromY) // record markings after from-change
+	if(oldX == -1 && oldY == -1 && x == fromX && y == fromY) { // record markings after from-change
 	  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
 	    baseMarker[r][f] = marker[r][f], baseLegal[r][f] = legal[r][f];
-	else if(oldX != x || oldY != y) {
+	  hoverSavedValid = 1;
+	} else if(oldX != x || oldY != y) {
 	  // [HGM] lift: entered new to-square; redraw arrow, and inform engine
+	  if(hoverSavedValid) // don't restore markers that are supposed to be cleared
 	  for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++)
 	    marker[r][f] = baseMarker[r][f], legal[r][f] = baseLegal[r][f];
 	  if((marker[y][x] == 2 || marker[y][x] == 6) && legal[y][x]) {
@@ -7348,7 +7479,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	/* Check if clicking again on the same color piece */
 	fromP = boards[currentMove][fromY][fromX];
 	toP = boards[currentMove][y][x];
-	frc = gameInfo.variant == VariantFischeRandom || gameInfo.variant == VariantCapaRandom || gameInfo.variant == VariantSChess;
+	frc = appData.fischerCastling || gameInfo.variant == VariantSChess;
  	if( (killX < 0 || x != fromX || y != fromY) && // [HGM] lion: do not interpret igui as deselect!
 	   ((WhitePawn <= fromP && fromP <= WhiteKing &&
 	     WhitePawn <= toP && toP <= WhiteKing &&
@@ -7445,8 +7576,11 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	toY = y;
     }
 
+    piece = boards[currentMove][fromY][fromX];
+
     saveAnimate = appData.animate;
     if (clickType == Press) {
+	if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) defaultPromoChoice = piece;
 	if(gameMode == EditPosition && boards[currentMove][fromY][fromX] == EmptySquare) {
 	    // must be Edit Position mode with empty-square selected
 	    fromX = x; fromY = y; DragPieceBegin(xPix, yPix, FALSE); dragging = 1; // consider this a new attempt to drag
@@ -7454,7 +7588,6 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    return;
 	}
 	if(dragging == 2) {  // [HGM] lion: just turn buttonless drag into normal drag, and let release to the job
-	    dragging = 1;
 	    return;
 	}
 	if(x == killX && y == killY) {              // second click on this square, which was selected as first-leg target
@@ -7463,9 +7596,8 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	if(marker[y][x] == 5) return; // [HGM] lion: to-click on cyan square; defer action to release
 	if(legal[y][x] == 2 || HasPromotionChoice(fromX, fromY, toX, toY, &promoChoice, FALSE)) {
 	  if(appData.sweepSelect) {
-	    ChessSquare piece = boards[currentMove][fromY][fromX];
 	    promoSweep = defaultPromoChoice;
-	    if(PieceToChar(CHUPROMOTED piece) == '+') promoSweep = CHUPROMOTED piece;
+	    if(gameInfo.variant != VariantChuChess && PieceToChar(CHUPROMOTED piece) == '+') promoSweep = CHUPROMOTED piece;
 	    selectFlag = 0; lastX = xPix; lastY = yPix;
 	    Sweep(0); // Pawn that is going to promote: preview promotion piece
 	    sweepSelecting = 1;
@@ -7481,7 +7613,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    ClearHighlights();
 	}
     } else if(sweepSelecting) { // this must be the up-click corresponding to the down-click that started the sweep
-	sweepSelecting = 0;
+	sweepSelecting = 0; appData.animate = FALSE; // do not animate, a selected piece already on to-square
 	if (appData.animate || appData.highlightLastMove) {
 	    SetHighlights(fromX, fromY, toX, toY);
 	} else {
@@ -7497,14 +7629,15 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    ClearHighlights();
 	}
 #endif
+	if(gameInfo.variant == VariantChuChess && piece != WhitePawn && piece != BlackPawn) defaultPromoChoice = piece;
 	if(marker[y][x] == 5) { // [HGM] lion: this was the release of a to-click or drag on a cyan square
 	  dragging *= 2;            // flag button-less dragging if we are dragging
 	  MarkTargetSquares(1);
 	  if(x == killX && y == killY) killX = killY = -1; else {
 	    killX = x; killY = y;     //remeber this square as intermediate
-	    MarkTargetSquares(0);
 	    ReportClick("put", x, y); // and inform engine
 	    ReportClick("lift", x, y);
+	    MarkTargetSquares(0);
 	    return;
 	  }
 	}
@@ -7563,7 +7696,7 @@ LeftClick (ClickType clickType, int xPix, int yPix)
 	    DisplayMessage("Click in holdings to choose piece", "");
 	    return;
 	}
-	PromotionPopUp();
+	PromotionPopUp(promoChoice);
     } else {
 	int oldMove = currentMove;
 	UserMoveEvent(fromX, fromY, toX, toY, promoChoice);
@@ -7957,6 +8090,7 @@ Adjudicate (ChessProgramState *cps)
 	      case MT_NONE:
 	      default:
 		break;
+	      case MT_STEALMATE:
 	      case MT_STALEMATE:
 	      case MT_STAINMATE:
 		reason = "Xboard adjudication: Stalemate";
@@ -8195,11 +8329,66 @@ Adjudicate (ChessProgramState *cps)
 	return 0;
 }
 
+typedef int (CDECL *PPROBE_EGBB) (int player, int *piece, int *square);
+typedef int (CDECL *PLOAD_EGBB) (char *path, int cache_size, int load_options);
+static int egbbCode[] = { 6, 5, 4, 3, 2, 1 };
+
+static int
+BitbaseProbe ()
+{
+    int pieces[10], squares[10], cnt=0, r, f, res;
+    static int loaded;
+    static PPROBE_EGBB probeBB;
+    if(!appData.testLegality) return 10;
+    if(BOARD_HEIGHT != 8 || BOARD_RGHT-BOARD_LEFT != 8) return 12;
+    if(gameInfo.holdingsSize && gameInfo.variant != VariantSuper && gameInfo.variant != VariantSChess) return 12;
+    if(loaded == 2 && forwardMostMove < 2) loaded = 0; // retry on new game
+    for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
+	ChessSquare piece = boards[forwardMostMove][r][f];
+	int black = (piece >= BlackPawn);
+	int type = piece - black*BlackPawn;
+	if(piece == EmptySquare) continue;
+	if(type != WhiteKing && type > WhiteQueen) return 12; // unorthodox piece
+	if(type == WhiteKing) type = WhiteQueen + 1;
+	type = egbbCode[type];
+	squares[cnt] = r*(BOARD_RGHT - BOARD_LEFT) + f - BOARD_LEFT;
+        pieces[cnt] = type + black*6;
+	if(++cnt > 5) return 11;
+    }
+    pieces[cnt] = squares[cnt] = 0;
+    // probe EGBB
+    if(loaded == 2) return 13; // loading failed before
+    if(loaded == 0) {
+	loaded = 2; // prepare for failure
+	char *p, *path = strstr(appData.egtFormats, "scorpio:"), buf[MSG_SIZ];
+	HMODULE lib;
+	PLOAD_EGBB loadBB;
+	if(!path) return 13; // no egbb installed
+	strncpy(buf, path + 8, MSG_SIZ);
+	if(p = strchr(buf, ',')) *p = NULLCHAR; else p = buf + strlen(buf);
+	snprintf(p, MSG_SIZ - strlen(buf), "%c%s", SLASH, EGBB_NAME);
+	lib = LoadLibrary(buf);
+	if(!lib) { DisplayError(_("could not load EGBB library"), 0); return 13; }
+	loadBB = (PLOAD_EGBB) GetProcAddress(lib, "load_egbb_xmen");
+	probeBB = (PPROBE_EGBB) GetProcAddress(lib, "probe_egbb_xmen");
+	if(!loadBB || !probeBB) { DisplayError(_("wrong EGBB version"), 0); return 13; }
+	p[1] = NULLCHAR; loadBB(buf, 64*1028, 2); // 2 = SMART_LOAD
+	loaded = 1; // success!
+    }
+    res = probeBB(forwardMostMove & 1, pieces, squares);
+    return res > 0 ? 1 : res < 0 ? -1 : 0;
+}
+
 char *
 SendMoveToBookUser (int moveNr, ChessProgramState *cps, int initial)
 {   // [HGM] book: this routine intercepts moves to simulate book replies
     char *bookHit = NULL;
 
+    if(cps->drawDepth && BitbaseProbe() == 0) { // [HG} egbb: reduce depth in drawn position
+	char buf[MSG_SIZ];
+	snprintf(buf, MSG_SIZ, "sd %d\n", cps->drawDepth);
+	SendToProgram(buf, cps);
+    }
     //first determine if the incoming move brings opponent into his book
     if(appData.usePolyglotBook && (cps == &first ? !appData.firstHasOwnBookUCI : !appData.secondHasOwnBookUCI))
 	bookHit = ProbeBook(moveNr+1, appData.polyglotBook); // returns move
@@ -8287,7 +8476,7 @@ HandleMachineMove (char *message, ChessProgramState *cps)
     char realname[MSG_SIZ];
     int fromX, fromY, toX, toY;
     ChessMove moveType;
-    char promoChar;
+    char promoChar, roar;
     char *p, *pv=buf1;
     int machineWhite, oldError;
     char *bookHit;
@@ -8449,8 +8638,8 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
 	  snprintf(buf1, MSG_SIZ*10, _("Illegal move \"%s\" from %s machine"),
 		    machineMove, _(cps->which));
 	    DisplayMoveError(buf1);
-            snprintf(buf1, MSG_SIZ*10, "Xboard: Forfeit due to invalid move: %s (%c%c%c%c) res=%d",
-                    machineMove, fromX+AAA, fromY+ONE, toX+AAA, toY+ONE, moveType);
+            snprintf(buf1, MSG_SIZ*10, "Xboard: Forfeit due to invalid move: %s (%c%c%c%c via %c%c) res=%d",
+                    machineMove, fromX+AAA, fromY+ONE, toX+AAA, toY+ONE, killX+AAA, killY+ONE, moveType);
 	    if (gameMode == TwoMachinesPlay) {
 	      GameEnds(machineWhite ? BlackWins : WhiteWins,
                        buf1, GE_XBOARD);
@@ -8473,7 +8662,7 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
                 GameEnds(machineWhite ? BlackWins : WhiteWins,
                            buf1, GE_XBOARD);
 		return;
-           } else if(gameInfo.variant != VariantFischeRandom && gameInfo.variant != VariantCapaRandom)
+           } else if(!appData.fischerCastling)
            /* [HGM] Kludge to handle engines that send FRC-style castling
               when they shouldn't (like TSCP-Gothic) */
            switch(moveType) {
@@ -8517,7 +8706,7 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
         }
 
         /* [AS] Adjudicate game if needed (note: remember that forwardMostMove now points past the last move) */
-        if( gameMode == TwoMachinesPlay && adjudicateLossThreshold != 0 && forwardMostMove >= adjudicateLossPlies ) {
+        if( gameMode == TwoMachinesPlay && appData.adjudicateLossThreshold != 0 && forwardMostMove >= adjudicateLossPlies ) {
             int count = 0;
 
             while( count < adjudicateLossPlies ) {
@@ -8526,8 +8715,8 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
                 if( count & 1 ) {
                     score = -score; /* Flip score for winning side */
                 }
-
-                if( score > adjudicateLossThreshold ) {
+printf("score=%d count=%d\n",score,count);
+                if( score > appData.adjudicateLossThreshold ) {
                     break;
                 }
 
@@ -8571,7 +8760,6 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
 			(unsigned int)programStats.nodes / (10*abs(programStats.time) + 1.),
 			programStats.movelist);
 		SendToICS(buf);
-if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.nodes, programStats.nodes);
 	  }
 	}
 #endif
@@ -8603,10 +8791,12 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
 	    cps->other->maybeThinking = TRUE;
 	}
 
+	roar = (killX >= 0 && IS_LION(boards[forwardMostMove][toY][toX]));
+
 	ShowMove(fromX, fromY, toX, toY); /*updates currentMove*/
 
         if (!pausing && appData.ringBellAfterMoves) {
-	    RingBell();
+	    if(!roar) RingBell();
 	}
 
 	/*
@@ -8657,12 +8847,16 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
     }
 
     if (!strncmp(message, "setup ", 6) && 
-	(!appData.testLegality || gameInfo.variant == VariantFairy || gameInfo.variant == VariantUnknown || NonStandardBoardSize())
+	(!appData.testLegality || gameInfo.variant == VariantFairy || gameInfo.variant == VariantUnknown ||
+          NonStandardBoardSize(gameInfo.variant, gameInfo.boardWidth, gameInfo.boardHeight, gameInfo.holdingsSize))
 					) { // [HGM] allow first engine to define opening position
       int dummy, w, h, hand, s=6; char buf[MSG_SIZ], varName[MSG_SIZ];
       if(appData.icsActive || forwardMostMove != 0 || cps != &first) return;
       *buf = NULLCHAR;
-      if(sscanf(message, "setup (%s", buf) == 1) s = 8 + strlen(buf), buf[s-9] = NULLCHAR, SetCharTable(pieceToChar, buf);
+      if(sscanf(message, "setup (%s", buf) == 1) {
+        s = 8 + strlen(buf), buf[s-9] = NULLCHAR, SetCharTable(pieceToChar, buf);
+        ASSIGN(appData.pieceToCharTable, buf);
+      }
       if(startedFromSetupPosition) return;
       dummy = sscanf(message+s, "%dx%d+%d_%s", &w, &h, &hand, varName);
       if(dummy >= 3) {
@@ -8788,6 +8982,14 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
 	}
     }
     if (sscanf(message, "pong %d", &cps->lastPong) == 1) {
+	if(initPing == cps->lastPong) {
+	    if(gameInfo.variant == VariantUnknown) {
+		DisplayError(_("Engine did not send setup for non-standard variant"), 0);
+		*engineVariant = NULLCHAR; appData.variant = VariantNormal; // back to normal as error recovery?
+		GameEnds(GameUnfinished, NULL, GE_XBOARD);
+	    }
+	    initPing = -1;
+        }
 	return;
     }
     if(!strncmp(message, "highlight ", 10)) {
@@ -8935,6 +9137,10 @@ if(appData.debugMode) fprintf(debugFP, "nodes = %d, %lld\n", (int) programStats.
 	   Don't use it. */
 	cps->sendTime = 0;
     }
+    if (cps->pseudo) { // [HGM] pseudo-engine, granted unusual powers
+	if (sscanf(message, "wtime %ld\n", &whiteTimeRemaining) == 1 || // adjust clock times
+	    sscanf(message, "btime %ld\n", &blackTimeRemaining) == 1   ) return;
+    }
 
     /*
      * If chess program startup fails, exit with an error message.
@@ -9497,6 +9703,7 @@ ParseGameHistory (char *game)
 	  case WhiteNonPromotion:
 	  case BlackNonPromotion:
 	  case NormalMove:
+	  case FirstLeg:
 	  case WhiteCapturesEnPassant:
 	  case BlackCapturesEnPassant:
 	  case WhiteKingSideCastle:
@@ -9620,7 +9827,7 @@ ParseGameHistory (char *game)
 	  default:
 	    break;
 	  case MT_CHECK:
-            if(gameInfo.variant != VariantShogi)
+            if(!IS_SHOGI(gameInfo.variant))
                 strcat(parseList[boardIndex - 1], "+");
 	    break;
 	  case MT_CHECKMATE:
@@ -9637,7 +9844,7 @@ void
 ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
 {
   ChessSquare captured = board[toY][toX], piece, king; int p, oldEP = EP_NONE, berolina = 0;
-  int promoRank = gameInfo.variant == VariantMakruk || gameInfo.variant == VariantGrand ? 3 : 1;
+  int promoRank = gameInfo.variant == VariantMakruk || gameInfo.variant == VariantGrand || gameInfo.variant == VariantChuChess ? 3 : 1;
 
     /* [HGM] compute & store e.p. status and castling rights for new position */
     /* we can always do that 'in place', now pointers to these rights are passed to ApplyMove */
@@ -9654,11 +9861,11 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
 	}
         piece = board[toY][toX] = (ChessSquare) fromX;
   } else {
-      ChessSquare victim;
+//      ChessSquare victim;
       int i;
 
       if( killX >= 0 && killY >= 0 ) // [HGM] lion: Lion trampled over something
-           victim = board[killY][killX],
+//           victim = board[killY][killX],
            board[killY][killX] = EmptySquare,
            board[EP_STATUS] = EP_CAPTURE;
 
@@ -9757,7 +9964,7 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
         board[toY][toX+1] = board[fromY][BOARD_LEFT];
         board[fromY][BOARD_LEFT] = EmptySquare;
     } else if ((board[fromY][fromX] == WhitePawn && gameInfo.variant != VariantXiangqi ||
-                board[fromY][fromX] == WhiteLance && gameInfo.variant != VariantSuper && gameInfo.variant != VariantShogi)
+                board[fromY][fromX] == WhiteLance && gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu)
                && toY >= BOARD_HEIGHT-promoRank && promoChar // defaulting to Q is done elsewhere
                ) {
 	/* white pawn promotion */
@@ -9818,7 +10025,7 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
 	board[fromY][0] = EmptySquare;
 	board[toY][2] = BlackRook;
     } else if ((board[fromY][fromX] == BlackPawn && gameInfo.variant != VariantXiangqi ||
-                board[fromY][fromX] == BlackLance && gameInfo.variant != VariantSuper && gameInfo.variant != VariantShogi)
+                board[fromY][fromX] == BlackLance && gameInfo.variant != VariantSuper && gameInfo.variant != VariantChu)
 	       && toY < promoRank && promoChar
                ) {
 	/* black pawn promotion */
@@ -9931,12 +10138,15 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
 	board[toY][toX] = EmptySquare;
       }
     }
+
     if(gameInfo.variant == VariantSChess && promoChar != NULLCHAR && promoChar != '=' && piece != WhitePawn && piece != BlackPawn) {
         board[fromY][fromX] = CharToPiece(piece < BlackPawn ? ToUpper(promoChar) : ToLower(promoChar)); // S-Chess gating
     } else
     if(promoChar == '+') {
         /* [HGM] Shogi-style promotions, to piece implied by original (Might overwrite ordinary Pawn promotion) */
         board[toY][toX] = (ChessSquare) (CHUPROMOTED piece);
+        if(gameInfo.variant == VariantChuChess && (piece == WhiteKnight || piece == BlackKnight))
+          board[toY][toX] = piece + WhiteLion - WhiteKnight; // adjust Knight promotions to Lion
     } else if(!appData.testLegality && promoChar != NULLCHAR && promoChar != '=') { // without legality testing, unconditionally believe promoChar
         ChessSquare newPiece = CharToPiece(piece < BlackPawn ? ToUpper(promoChar) : ToLower(promoChar));
 	if((newPiece <= WhiteMan || newPiece >= BlackPawn && newPiece <= BlackMan) // unpromoted piece specified
@@ -10059,7 +10269,7 @@ MakeMove (int fromX, int fromY, int toX, int toY, int promoChar)
       default:
 	break;
       case MT_CHECK:
-        if(gameInfo.variant != VariantShogi)
+        if(!IS_SHOGI(gameInfo.variant))
             strcat(parseList[forwardMostMove - 1], "+");
 	break;
       case MT_CHECKMATE:
@@ -10067,8 +10277,6 @@ MakeMove (int fromX, int fromY, int toX, int toY, int promoChar)
 	strcat(parseList[forwardMostMove - 1], "#");
 	break;
     }
-
-    killX = killY = -1; // [HGM] lion: used up
 }
 
 /* Updates currentMove if not pausing */
@@ -10088,6 +10296,8 @@ ShowMove (int fromX, int fromY, int toX, int toY)
 	currentMove = forwardMostMove;
     }
 
+    killX = killY = -1; // [HGM] lion: used up
+
     if (instant) return;
 
     DisplayMove(currentMove - 1);
@@ -10136,40 +10346,75 @@ SendEgtPath (ChessProgramState *cps)
 }
 
 static int
-NonStandardBoardSize ()
-{
-      /* [HGM] Awkward testing. Should really be a table */
-      int overruled = gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 0;
-      if( gameInfo.variant == VariantUnknown || *engineVariant) return 0; // engine-defined name never needs prefix
-      if( gameInfo.variant == VariantXiangqi )
-           overruled = gameInfo.boardWidth != 9 || gameInfo.boardHeight != 10 || gameInfo.holdingsSize != 0;
-      if( gameInfo.variant == VariantShogi )
-           overruled = gameInfo.boardWidth != 9 || gameInfo.boardHeight != 9 || gameInfo.holdingsSize != 7;
-      if( gameInfo.variant == VariantBughouse || gameInfo.variant == VariantCrazyhouse )
-           overruled = gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 5;
-      if( gameInfo.variant == VariantCapablanca || gameInfo.variant == VariantCapaRandom ||
-          gameInfo.variant == VariantGothic || gameInfo.variant == VariantFalcon || gameInfo.variant == VariantJanus )
-           overruled = gameInfo.boardWidth != 10 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 0;
-      if( gameInfo.variant == VariantCourier )
-           overruled = gameInfo.boardWidth != 12 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 0;
-      if( gameInfo.variant == VariantSuper )
-           overruled = gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 8;
-      if( gameInfo.variant == VariantGreat )
-           overruled = gameInfo.boardWidth != 10 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 8;
-      if( gameInfo.variant == VariantSChess )
-           overruled = gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 7;
-      if( gameInfo.variant == VariantGrand )
-           overruled = gameInfo.boardWidth != 10 || gameInfo.boardHeight != 10 || gameInfo.holdingsSize != 7;
-      if( gameInfo.variant == VariantChu )
-           overruled = gameInfo.boardWidth != 12 || gameInfo.boardHeight != 12 || gameInfo.holdingsSize != 0;
-      return overruled;
+NonStandardBoardSize (VariantClass v, int boardWidth, int boardHeight, int holdingsSize)
+{
+      int width = 8, height = 8, holdings = 0;             // most common sizes
+      if( v == VariantUnknown || *engineVariant) return 0; // engine-defined name never needs prefix
+      // correct the deviations default for each variant
+      if( v == VariantXiangqi ) width = 9,  height = 10;
+      if( v == VariantShogi )   width = 9,  height = 9,  holdings = 7;
+      if( v == VariantBughouse || v == VariantCrazyhouse) holdings = 5;
+      if( v == VariantCapablanca || v == VariantCapaRandom ||
+          v == VariantGothic || v == VariantFalcon || v == VariantJanus )
+                                width = 10;
+      if( v == VariantCourier ) width = 12;
+      if( v == VariantSuper )                            holdings = 8;
+      if( v == VariantGreat )   width = 10,              holdings = 8;
+      if( v == VariantSChess )                           holdings = 7;
+      if( v == VariantGrand )   width = 10, height = 10, holdings = 7;
+      if( v == VariantChuChess) width = 10, height = 10;
+      if( v == VariantChu )     width = 12, height = 12;
+      return boardWidth >= 0   && boardWidth   != width  || // -1 is default,
+             boardHeight >= 0  && boardHeight  != height || // and thus by definition OK
+             holdingsSize >= 0 && holdingsSize != holdings;
+}
+
+char variantError[MSG_SIZ];
+
+char *
+SupportedVariant (char *list, VariantClass v, int boardWidth, int boardHeight, int holdingsSize, int proto, char *engine)
+{     // returns error message (recognizable by upper-case) if engine does not support the variant
+      char *p, *variant = VariantName(v);
+      static char b[MSG_SIZ];
+      if(NonStandardBoardSize(v, boardWidth, boardHeight, holdingsSize)) { /* [HGM] make prefix for non-standard board size. */
+	   snprintf(b, MSG_SIZ, "%dx%d+%d_%s", boardWidth, boardHeight,
+                                               holdingsSize, variant); // cook up sized variant name
+           /* [HGM] varsize: try first if this deviant size variant is specifically known */
+           if(StrStr(list, b) == NULL) {
+               // specific sized variant not known, check if general sizing allowed
+               if(proto != 1 && StrStr(list, "boardsize") == NULL) {
+                   snprintf(variantError, MSG_SIZ, "Board size %dx%d+%d not supported by %s",
+                            boardWidth, boardHeight, holdingsSize, engine);
+                   return NULL;
+               }
+               /* [HGM] here we really should compare with the maximum supported board size */
+           }
+      } else snprintf(b, MSG_SIZ,"%s", variant);
+      if(proto == 1) return b; // for protocol 1 we cannot check and hope for the best
+      p = StrStr(list, b);
+      while(p && (p != list && p[-1] != ',' || p[strlen(b)] && p[strlen(b)] != ',') ) p = StrStr(p+1, b);
+      if(p == NULL) {
+          // occurs not at all in list, or only as sub-string
+          snprintf(variantError, MSG_SIZ, _("Variant %s not supported by %s"), b, engine);
+          if(p = StrStr(list, b)) { // handle requesting parent variant when only size-overridden is supported
+              int l = strlen(variantError);
+              char *q;
+              while(p != list && p[-1] != ',') p--;
+              q = strchr(p, ',');
+              if(q) *q = NULLCHAR;
+              snprintf(variantError + l, MSG_SIZ - l,  _(", but %s is"), p);
+              if(q) *q= ',';
+          }
+          return NULL;
+      }
+      return b;
 }
 
 void
 InitChessProgram (ChessProgramState *cps, int setup)
 /* setup needed to setup FRC opening position */
 {
-    char buf[MSG_SIZ], b[MSG_SIZ];
+    char buf[MSG_SIZ], *b;
     if (appData.noChessProgram) return;
     hintRequested = FALSE;
     bookRequested = FALSE;
@@ -10187,37 +10432,20 @@ InitChessProgram (ChessProgramState *cps, int setup)
 	SendToProgram(buf, cps);
     }
 
+    setboardSpoiledMachineBlack = FALSE;
     SendToProgram(cps->initString, cps);
     if (gameInfo.variant != VariantNormal &&
 	gameInfo.variant != VariantLoadable
         /* [HGM] also send variant if board size non-standard */
-        || gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 0
-                                            ) {
-      char *v = VariantName(gameInfo.variant);
-      if (cps->protocolVersion != 1 && StrStr(cps->variants, v) == NULL) {
-        /* [HGM] in protocol 1 we have to assume all variants valid */
-	snprintf(buf, MSG_SIZ, _("Variant %s not supported by %s"), v, cps->tidy);
-	DisplayFatalError(buf, 0, 1);
+        || gameInfo.boardWidth != 8 || gameInfo.boardHeight != 8 || gameInfo.holdingsSize != 0) {
+
+      b = SupportedVariant(cps->variants, gameInfo.variant, gameInfo.boardWidth,
+                           gameInfo.boardHeight, gameInfo.holdingsSize, cps->protocolVersion, cps->tidy);
+      if (b == NULL) {
+	DisplayFatalError(variantError, 0, 1);
 	return;
       }
 
-      if(NonStandardBoardSize()) { /* [HGM] make prefix for non-standard board size. */
-	snprintf(b, MSG_SIZ, "%dx%d+%d_%s", gameInfo.boardWidth, gameInfo.boardHeight,
-		 gameInfo.holdingsSize, VariantName(gameInfo.variant)); // cook up sized variant name
-           /* [HGM] varsize: try first if this defiant size variant is specifically known */
-           if(StrStr(cps->variants, b) == NULL) {
-               // specific sized variant not known, check if general sizing allowed
-               if (cps->protocolVersion != 1) { // for protocol 1 we cannot check and hope for the best
-                   if(StrStr(cps->variants, "boardsize") == NULL) {
-		     snprintf(buf, MSG_SIZ, "Board size %dx%d+%d not supported by %s",
-                            gameInfo.boardWidth, gameInfo.boardHeight, gameInfo.holdingsSize, cps->tidy);
-                       DisplayFatalError(buf, 0, 1);
-                       return;
-                   }
-                   /* [HGM] here we really should compare with the maximum supported board size */
-               }
-           }
-      } else snprintf(b, MSG_SIZ,"%s", VariantName(gameInfo.variant));
       snprintf(buf, MSG_SIZ, "variant %s\n", b);
       SendToProgram(buf, cps);
     }
@@ -10257,7 +10485,7 @@ InitChessProgram (ChessProgramState *cps, int setup)
 	SendToProgram("easy\n", cps);
     }
     if (cps->usePing) {
-      snprintf(buf, MSG_SIZ, "ping %d\n", ++cps->lastPing);
+      snprintf(buf, MSG_SIZ, "ping %d\n", initPing = ++cps->lastPing);
       SendToProgram(buf, cps);
     }
     cps->initDone = TRUE;
@@ -10616,7 +10844,9 @@ SwapEngines (int n)
     SWAP(fenOverride, p)
     SWAP(NPS, h)
     SWAP(accumulateTC, h)
+    SWAP(drawDepth, h)
     SWAP(host, p)
+    SWAP(pseudo, h)
 }
 
 int
@@ -10897,7 +11127,7 @@ GameEnds (ChessMove result, char *resultDetails, int whosays)
 	      result, resultDetails ? resultDetails : "(null)", whosays);
     }
 
-    fromX = fromY = -1; // [HGM] abort any move the user is entering.
+    fromX = fromY = killX = killY = -1; // [HGM] abort any move the user is entering. // [HGM] lion
 
     if(pausing) PauseEvent(); // can happen when we abort a paused game (New Game or Quit)
 
@@ -11167,8 +11397,7 @@ GameEnds (ChessMove result, char *resultDetails, int whosays)
 	    ExitAnalyzeMode();
             DoSleep( appData.delayBeforeQuit );
 	    SendToProgram("quit\n", &first);
-            DoSleep( appData.delayAfterQuit );
-	    DestroyChildProcess(first.pr, first.useSigterm);
+	    DestroyChildProcess(first.pr, 4 + first.useSigterm);
 	    first.reload = TRUE;
 	}
 	first.pr = NoProc;
@@ -11193,8 +11422,7 @@ GameEnds (ChessMove result, char *resultDetails, int whosays)
 	if (second.pr != NoProc) {
             DoSleep( appData.delayBeforeQuit );
 	    SendToProgram("quit\n", &second);
-            DoSleep( appData.delayAfterQuit );
-	    DestroyChildProcess(second.pr, second.useSigterm);
+	    DestroyChildProcess(second.pr, 4 + second.useSigterm);
 	    second.reload = TRUE;
 	}
 	second.pr = NoProc;
@@ -11296,7 +11524,8 @@ FeedMovesToProgram (ChessProgramState *cps, int upto)
     if(currentlyInitializedVariant != gameInfo.variant) {
       char buf[MSG_SIZ];
         // [HGM] variantswitch: make engine aware of new variant
-	if(cps->protocolVersion > 1 && StrStr(cps->variants, VariantName(gameInfo.variant)) == NULL)
+	if(!SupportedVariant(cps->variants, gameInfo.variant, gameInfo.boardWidth,
+                             gameInfo.boardHeight, gameInfo.holdingsSize, cps->protocolVersion, ""))
 		return; // [HGM] refrain from feeding moves altogether if variant is unsupported!
 	snprintf(buf, MSG_SIZ, "variant %s\n", VariantName(gameInfo.variant));
 	SendToProgram(buf, cps);
@@ -11393,6 +11622,7 @@ Reset (int redraw, int init)
     ClearPremoveHighlights();
     gotPremove = FALSE;
     alarmSounded = FALSE;
+    killX = killY = -1; // [HGM] lion
 
     GameEnds(EndOfFile, NULL, GE_PLAYER);
     if(appData.serverMovesName != NULL) {
@@ -11573,6 +11803,7 @@ LoadGameOneMove (ChessMove readAhead)
       case WhiteNonPromotion:
       case BlackNonPromotion:
       case NormalMove:
+      case FirstLeg:
       case WhiteKingSideCastle:
       case WhiteQueenSideCastle:
       case BlackKingSideCastle:
@@ -11594,6 +11825,7 @@ LoadGameOneMove (ChessMove readAhead)
         toX = currentMoveString[2] - AAA;
         toY = currentMoveString[3] - ONE;
 	promoChar = currentMoveString[4];
+	if(promoChar == ';') promoChar = NULLCHAR;
 	break;
 
       case WhiteDrop:
@@ -11760,6 +11992,7 @@ LoadGameOneMove (ChessMove readAhead)
 
 	thinkOutput[0] = NULLCHAR;
 	MakeMove(fromX, fromY, toX, toY, promoChar);
+	killX = killY = -1; // [HGM] lion: used up
 	currentMove = forwardMostMove;
 	return TRUE;
     }
@@ -12006,22 +12239,40 @@ void
 PackMove (int fromX, int fromY, int toX, int toY, ChessSquare promoPiece)
 {
     int sq = fromX + (fromY<<4);
-    int piece = quickBoard[sq];
+    int piece = quickBoard[sq], rook;
     quickBoard[sq] = 0;
     moveDatabase[movePtr].to = pieceList[piece] = sq = toX + (toY<<4);
-    if(piece == pieceList[1] && fromY == toY && (toX > fromX+1 || toX < fromX-1) && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1) {
+    if(piece == pieceList[1] && fromY == toY) {
+      if((toX > fromX+1 || toX < fromX-1) && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1) {
 	int from = toX>fromX ? BOARD_RGHT-1 : BOARD_LEFT;
 	moveDatabase[movePtr++].piece = Q_WCASTL;
 	quickBoard[sq] = piece;
 	piece = quickBoard[from]; quickBoard[from] = 0;
 	moveDatabase[movePtr].to = pieceList[piece] = sq = toX>fromX ? sq-1 : sq+1;
+      } else if((rook = quickBoard[sq]) && pieceType[rook] == WhiteRook) { // FRC castling
+	quickBoard[sq] = 0; // remove Rook
+	moveDatabase[movePtr].to = sq = (toX>fromX ? BOARD_RGHT-2 : BOARD_LEFT+2); // King to-square
+	moveDatabase[movePtr++].piece = Q_WCASTL;
+	quickBoard[sq] = pieceList[1]; // put King
+	piece = rook;
+	moveDatabase[movePtr].to = pieceList[rook] = sq = toX>fromX ? sq-1 : sq+1;
+      }
     } else
-    if(piece == pieceList[2] && fromY == toY && (toX > fromX+1 || toX < fromX-1) && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1) {
+    if(piece == pieceList[2] && fromY == toY) {
+      if((toX > fromX+1 || toX < fromX-1) && fromX != BOARD_LEFT && fromX != BOARD_RGHT-1) {
 	int from = (toX>fromX ? BOARD_RGHT-1 : BOARD_LEFT) + (BOARD_HEIGHT-1 <<4);
 	moveDatabase[movePtr++].piece = Q_BCASTL;
 	quickBoard[sq] = piece;
 	piece = quickBoard[from]; quickBoard[from] = 0;
 	moveDatabase[movePtr].to = pieceList[piece] = sq = toX>fromX ? sq-1 : sq+1;
+      } else if((rook = quickBoard[sq]) && pieceType[rook] == BlackRook) { // FRC castling
+	quickBoard[sq] = 0; // remove Rook
+	moveDatabase[movePtr].to = sq = (toX>fromX ? BOARD_RGHT-2 : BOARD_LEFT+2);
+	moveDatabase[movePtr++].piece = Q_BCASTL;
+	quickBoard[sq] = pieceList[2]; // put King
+	piece = rook;
+	moveDatabase[movePtr].to = pieceList[rook] = sq = toX>fromX ? sq-1 : sq+1;
+      }
     } else
     if(epOK && (pieceType[piece] == WhitePawn || pieceType[piece] == BlackPawn) && fromX != toX && quickBoard[sq] == 0) {
 	quickBoard[(fromY<<4)+toX] = 0;
@@ -12257,6 +12508,7 @@ GameContainsPosition (FILE *f, ListGame *lg)
 	    case WhiteNonPromotion:
 	    case BlackNonPromotion:
 	    case NormalMove:
+	    case FirstLeg:
 	    case WhiteKingSideCastle:
 	    case WhiteQueenSideCastle:
 	    case BlackKingSideCastle:
@@ -12321,6 +12573,7 @@ LoadGame (FILE *f, int gameNumber, char *title, int useList)
     if (gameMode != BeginningOfGame) {
       Reset(FALSE, TRUE);
     }
+    killX = killY = -1; // [HGM] lion: in case we did not Reset
 
     gameFileFP = f;
     if (lastLoadGameFP != NULL && lastLoadGameFP != f) {
@@ -12474,6 +12727,7 @@ LoadGame (FILE *f, int gameNumber, char *title, int useList)
 	    break;
 
 	  case NormalMove:
+	  case FirstLeg:
 	    /* Only a NormalMove can be at the start of a game
 	     * without a position diagram. */
 	    if (lastLoadGameStart == EndOfFile ) {
@@ -13738,6 +13992,7 @@ ExitEvent (int status)
       return;
     }
 
+    if (appData.icsActive) printf("\n"); // [HGM] end on new line after closing XBoard
     if (appData.icsActive && appData.colorize) Colorize(ColorNone, FALSE);
 
     if (telnetISR != NULL) {
@@ -13764,14 +14019,12 @@ ExitEvent (int status)
 
         DoSleep( appData.delayBeforeQuit );
 	SendToProgram("quit\n", &first);
-        DoSleep( appData.delayAfterQuit );
-	DestroyChildProcess(first.pr, 10 /* [AS] first.useSigterm */ );
+	DestroyChildProcess(first.pr, 4 + first.useSigterm /* [AS] first.useSigterm */ );
     }
     if (second.pr != NoProc) {
         DoSleep( appData.delayBeforeQuit );
 	SendToProgram("quit\n", &second);
-        DoSleep( appData.delayAfterQuit );
-	DestroyChildProcess(second.pr, 10 /* [AS] second.useSigterm */ );
+	DestroyChildProcess(second.pr, 4 + second.useSigterm /* [AS] second.useSigterm */ );
     }
     if (first.isr != NULL) {
 	RemoveInputSource(first.isr);
@@ -14002,7 +14255,10 @@ AnalyzeModeEvent ()
 	first.maybeThinking = FALSE; /* avoid killing GNU Chess */
 	EngineOutputPopUp();
     }
-    if (!appData.icsEngineAnalyze) gameMode = AnalyzeMode;
+    if (!appData.icsEngineAnalyze) {
+	gameMode = AnalyzeMode;
+	ClearEngineOutputPane(0); // [TK] exclude: to print exclusion/multipv header
+    }
     pausing = FALSE;
     ModeHighlight();
     SetGameInfo();
@@ -14323,7 +14579,8 @@ TwoMachinesEvent P((void))
     }
     if(WaitForEngine(&second, TwoMachinesEventIfReady)) return; // (if needed:) started up second engine, so wait for features
 
-    if(second.protocolVersion >= 2 && !strstr(second.variants, VariantName(gameInfo.variant))) {
+    if(!SupportedVariant(second.variants, gameInfo.variant, gameInfo.boardWidth,
+                         gameInfo.boardHeight, gameInfo.holdingsSize, second.protocolVersion, second.tidy)) {
 	startingEngine = FALSE;
 	DisplayError("second engine does not play this", 0);
 	return;
@@ -17382,12 +17639,12 @@ PositionToFEN (int move, char *overrideCastling, int moveCounts)
                 if(PieceToChar(piece) == '+') {
                     /* [HGM] write promoted pieces as '+<unpromoted>' (Shogi) */
                     *p++ = '+';
-                    piece = (ChessSquare)(DEMOTED piece);
+                    piece = (ChessSquare)(CHUDEMOTED piece);
                 }
                 *p++ = (piece == DarkSquare ? '*' : PieceToChar(piece));
                 if(p[-1] == '~') {
                     /* [HGM] flag promoted pieces as '<promoted>~' (Crazyhouse) */
-                    p[-1] = PieceToChar((ChessSquare)(DEMOTED piece));
+                    p[-1] = PieceToChar((ChessSquare)(CHUDEMOTED piece));
                     *p++ = '~';
                 }
 	    }
@@ -17433,7 +17690,7 @@ PositionToFEN (int move, char *overrideCastling, int moveCounts)
   } else {
   if(nrCastlingRights) {
      q = p;
-     if(gameInfo.variant == VariantFischeRandom || gameInfo.variant == VariantCapaRandom) {
+     if(appData.fischerCastling) {
        /* [HGM] write directly from rights */
            if(boards[move][CASTLING][2] != NoRights &&
               boards[move][CASTLING][0] != NoRights   )
@@ -17541,7 +17798,7 @@ PositionToFEN (int move, char *overrideCastling, int moveCounts)
 Boolean
 ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
 {
-    int i, j, k, w=0;
+    int i, j, k, w=0, subst=0, shuffle=0;
     char *p, c;
     int emptycount, virgin[BOARD_FILES];
     ChessSquare piece;
@@ -17565,7 +17822,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
 		    appData.NrRanks = gameInfo.boardHeight - i; i=0;
                 }
 		break;
-#if(BOARD_FILES >= 10)
+#if(BOARD_FILES >= 10)*0
             } else if(*p=='x' || *p=='X') { /* [HGM] X means 10 */
                 p++; emptycount=10;
                 if (j + emptycount > gameInfo.boardWidth) return FALSE;
@@ -17580,6 +17837,16 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
                 if (j + emptycount > gameInfo.boardWidth) return FALSE;
                 while (emptycount--)
                         board[i][(j++)+gameInfo.holdingsWidth] = EmptySquare;
+            } else if (*p == '<') {
+                if(i == BOARD_HEIGHT-1) shuffle = 1;
+                else if (i != 0 || !shuffle) return FALSE;
+                p++;
+            } else if (shuffle && *p == '>') {
+                p++; // for now ignore closing shuffle range, and assume rank-end
+            } else if (*p == '?') {
+                if (j >= gameInfo.boardWidth) return FALSE;
+                if (i != 0  && i != BOARD_HEIGHT-1) return FALSE; // only on back-rank
+		board[i][(j++)+gameInfo.holdingsWidth] = ClearBoard; p++; subst++; // placeHolder
             } else if (*p == '+' || isalpha(*p)) {
                 if (j >= gameInfo.boardWidth) return FALSE;
                 if(*p=='+') {
@@ -17618,7 +17885,9 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
     /* [HGM] look for Crazyhouse holdings here */
     while(*p==' ') p++;
     if( gameInfo.holdingsWidth && p[-1] == '/' || *p == '[') {
+        int swap=0, wcnt=0, bcnt=0;
         if(*p == '[') p++;
+        if(*p == '<') swap++, p++;
         if(*p == '-' ) p++; /* empty holdings */ else {
             if( !gameInfo.holdingsWidth ) return FALSE; /* no room to put holdings! */
             /* if we would allow FEN reading to set board size, we would   */
@@ -17631,18 +17900,46 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
                     if( i >= gameInfo.holdingsSize ) return FALSE;
                     board[BOARD_HEIGHT-1-i][0] = piece; /* black holdings */
                     board[BOARD_HEIGHT-1-i][1]++;       /* black counts   */
+                    bcnt++;
                 } else {
                     i = (int)piece - (int)WhitePawn;
 		    i = PieceToNumber((ChessSquare)i);
                     if( i >= gameInfo.holdingsSize ) return FALSE;
                     board[i][BOARD_WIDTH-1] = piece;    /* white holdings */
                     board[i][BOARD_WIDTH-2]++;          /* black holdings */
+                    wcnt++;
+                }
+            }
+            if(subst) { // substitute back-rank question marks by holdings pieces
+                for(j=BOARD_LEFT; j<BOARD_RGHT; j++) {
+                    int k, m, n = bcnt + 1;
+                    if(board[0][j] == ClearBoard) {
+                        if(!wcnt) return FALSE;
+                        n = rand() % wcnt;
+                        for(k=0, m=n; k<gameInfo.holdingsSize; k++) if((m -= board[k][BOARD_WIDTH-2]) < 0) {
+                            board[0][j] = board[k][BOARD_WIDTH-1]; wcnt--;
+                            if(--board[k][BOARD_WIDTH-2] == 0) board[k][BOARD_WIDTH-1] = EmptySquare;
+                            break;
+                        }
+                    }
+                    if(board[BOARD_HEIGHT-1][j] == ClearBoard) {
+                        if(!bcnt) return FALSE;
+                        if(n >= bcnt) n = rand() % bcnt; // use same randomization for black and white if possible
+                        for(k=0, m=n; k<gameInfo.holdingsSize; k++) if((n -= board[BOARD_HEIGHT-1-k][1]) < 0) {
+                            board[BOARD_HEIGHT-1][j] = board[BOARD_HEIGHT-1-k][0]; bcnt--;
+                            if(--board[BOARD_HEIGHT-1-k][1] == 0) board[BOARD_HEIGHT-1-k][0] = EmptySquare;
+                            break;
+                        }
+                    }
                 }
+                subst = 0;
             }
         }
         if(*p == ']') p++;
     }
 
+    if(subst) return FALSE; // substitution requested, but no holdings
+
     while(*p == ' ') p++;
 
     /* Active color */
@@ -17669,7 +17966,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
     board[EP_STATUS] = EP_UNKNOWN;
     for(i=0; i<nrCastlingRights; i++ ) {
         board[CASTLING][i] =
-            gameInfo.variant == VariantFischeRandom || gameInfo.variant == VariantCapaRandom ? NoRights : initialRights[i];
+            appData.fischerCastling ? NoRights : initialRights[i];
     }   /* assume possible unless obviously impossible */
     if(initialRights[0]!=NoRights && board[castlingRank[0]][initialRights[0]] != WhiteRook) board[CASTLING][0] = NoRights;
     if(initialRights[1]!=NoRights && board[castlingRank[1]][initialRights[1]] != WhiteRook) board[CASTLING][1] = NoRights;
@@ -17683,6 +17980,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
 
     while(*p==' ') p++;
     if(nrCastlingRights) {
+      int fischer = 0;
       if(gameInfo.variant == VariantSChess) for(i=0; i<BOARD_FILES; i++) virgin[i] = 0;
       if(*p >= 'A' && *p <= 'Z' || *p >= 'a' && *p <= 'z' || *p=='-') {
           /* castling indicator present, so default becomes no castlings */
@@ -17691,7 +17989,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
           }
       }
       while(*p=='K' || *p=='Q' || *p=='k' || *p=='q' || *p=='-' ||
-             (gameInfo.variant == VariantFischeRandom || gameInfo.variant == VariantCapaRandom || gameInfo.variant == VariantSChess) &&
+             (appData.fischerCastling || gameInfo.variant == VariantSChess) &&
              ( *p >= 'a' && *p < 'a' + gameInfo.boardWidth) ||
              ( *p >= 'A' && *p < 'A' + gameInfo.boardWidth)   ) {
         int c = *p++, whiteKingFile=NoRights, blackKingFile=NoRights;
@@ -17713,6 +18011,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
               board[CASTLING][2] = whiteKingFile;
 	      if(board[CASTLING][0] != NoRights) virgin[board[CASTLING][0]] |= VIRGIN_W;
 	      if(board[CASTLING][2] != NoRights) virgin[board[CASTLING][2]] |= VIRGIN_W;
+              if(whiteKingFile != BOARD_WIDTH>>1|| i != BOARD_RGHT-1) fischer = 1;
               break;
           case'Q':
               for(i=BOARD_LEFT;  i<BOARD_RGHT && board[0][i]!=WhiteRook && i<whiteKingFile; i++);
@@ -17720,6 +18019,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
               board[CASTLING][2] = whiteKingFile;
 	      if(board[CASTLING][1] != NoRights) virgin[board[CASTLING][1]] |= VIRGIN_W;
 	      if(board[CASTLING][2] != NoRights) virgin[board[CASTLING][2]] |= VIRGIN_W;
+              if(whiteKingFile != BOARD_WIDTH>>1|| i != BOARD_LEFT) fischer = 1;
               break;
           case'k':
               for(i=BOARD_RGHT-1; board[BOARD_HEIGHT-1][i]!=BlackRook && i>blackKingFile; i--);
@@ -17727,6 +18027,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
               board[CASTLING][5] = blackKingFile;
 	      if(board[CASTLING][3] != NoRights) virgin[board[CASTLING][3]] |= VIRGIN_B;
 	      if(board[CASTLING][5] != NoRights) virgin[board[CASTLING][5]] |= VIRGIN_B;
+              if(blackKingFile != BOARD_WIDTH>>1|| i != BOARD_RGHT-1) fischer = 1;
               break;
           case'q':
               for(i=BOARD_LEFT; i<BOARD_RGHT && board[BOARD_HEIGHT-1][i]!=BlackRook && i<blackKingFile; i++);
@@ -17734,6 +18035,7 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
               board[CASTLING][5] = blackKingFile;
 	      if(board[CASTLING][4] != NoRights) virgin[board[CASTLING][4]] |= VIRGIN_B;
 	      if(board[CASTLING][5] != NoRights) virgin[board[CASTLING][5]] |= VIRGIN_B;
+              if(blackKingFile != BOARD_WIDTH>>1|| i != BOARD_LEFT) fischer = 1;
           case '-':
               break;
           default: /* FRC castlings */
@@ -17767,7 +18069,9 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
       }
       for(i=0; i<nrCastlingRights; i++)
         if(board[CASTLING][i] != NoRights) initialRights[i] = board[CASTLING][i];
-      if(gameInfo.variant == VariantSChess) for(i=0; i<BOARD_FILES; i++) board[VIRGIN][i] = virgin[i];
+      if(gameInfo.variant == VariantSChess)
+        for(i=0; i<BOARD_FILES; i++) board[VIRGIN][i] = shuffle ? VIRGIN_W | VIRGIN_B : virgin[i]; // when shuffling assume all virgin
+      if(fischer && shuffle) appData.fischerCastling = TRUE;
     if (appData.debugMode) {
         fprintf(debugFP, "FEN castling rights:");
         for(i=0; i<nrCastlingRights; i++)
@@ -17778,6 +18082,8 @@ ParseFEN (Board board, int *blackPlaysFirst, char *fen, Boolean autoSize)
       while(*p==' ') p++;
     }
 
+    if(shuffle) SetUpShuffle(board, appData.defaultFrcPosition);
+
     /* read e.p. field in games that know e.p. capture */
     if(gameInfo.variant != VariantShogi    && gameInfo.variant != VariantXiangqi &&
        gameInfo.variant != VariantShatranj && gameInfo.variant != VariantCourier &&