X-Git-Url: http://winboard.nl/cgi-bin?p=uci2wb.git;a=blobdiff_plain;f=UCI2WB.c;h=ff5ec8cdfb142053da5a38a346c25fb35b47d3d9;hp=c075731fd01b4cf87d80ddc08d0eee70e4cb3ff5;hb=7bd5b32b970229a4a9cc23ca2e8849e30c6d9823;hpb=19d15a4533382e6c7ff78165279151bef8209aee

diff --git a/UCI2WB.c b/UCI2WB.c
index c075731..ff5ec8c 100644
--- a/UCI2WB.c
+++ b/UCI2WB.c
@@ -1,6 +1,15 @@
-/************************* UCI2WB by H.G.Muller ****************************/
-
-#define VERSION "1.9"
+/****************************************************************************/
+/*                           UCI2WB by H.G.Muller                           */
+/*                                                                          */
+/* UCI2WB is an adapter to run engines that communicate in various dialects */
+/* of the Universal Chess Interface in a GUI that supports XBoard protocol  */
+/* (CECP). It supports UCI (when used for Xiangqi: the 'Cyclone dialect'),  */
+/* as well as USI and UCCI when used with the flags -s or -x, respectively. */
+/* This version of UCI2WB is released under the GNU General Public License, */
+/* of which you should have received a copy together with this file.        */
+/****************************************************************************/
+
+#define VERSION "2.1"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -30,11 +39,15 @@
 #define NONE  2
 #define ANALYZE 3
 
-char move[2000][10], checkOptions[8192], iniPos[256], hashOpt[20], pause, pondering, ponder, post, hasHash, c, sc='c', *suffix, *variants;
-int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug;
-int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500]; char currMove[20], moveMap[500][10]; // for analyze mode
+char move[2000][10], checkOptions[8192], iniPos[256], hashOpt[20], pause, pondering, suspended, ponder, post, hasHash, c, sc='c', suffix[81], *variants;
+int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug, flob;
+int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500], frc, byo = -1;
+char currMove[20], moveMap[500][10], /* for analyze mode */ canPonder[20], threadOpt[20];
+char board[100];  // XQ board for UCCI
+char *nameWord = "name ", *valueWord = "value ", *wTime = "w", *bTime = "b", *wInc = "winc", *bInc = "binc", newGame; // keywords that differ in UCCI
+int unit = 1, drawOffer;
 
-FILE *toE, *fromE;
+FILE *toE, *fromE, *fromF;
 int pid;
 
 #ifdef WIN32
@@ -77,18 +90,69 @@ Sync (int action)
 }
 
 void
+FromFEN(char *fen)
+{	int i=0;
+	while(*fen) {
+	    char c = *fen++;
+	    if(c >= 'A') board[i++] = c; else
+	    if(c == '/') i++; else
+	    if(c == ' ') break; else
+	    while(c-- > '0' && i < 99) board[i++] = 0;
+	    if(i >= 99) break;
+	}
+}
+
+char *
+ToFEN(int stm)
+{
+	int i, n=0; static char fen[200]; char *p = fen;
+	for(i=0; i<99; i++) {
+	    char c = board[i];
+	    if(c >= 'A')  { if(n) *p++ = '0' + n; n = 0;  *p++ = c; } else n ++;
+	    if(i%10 == 8) { if(n) *p++ = '0' + n; n = -1; *p++ = '/'; }
+	}
+	sprintf(p-1, " %c - - 0 1", stm);
+	return fen;
+}
+
+int
+Sqr(char *m, int j)
+{
+	int n = m[j] - 'a' + 10*('9' - m[j+1]);
+	if(n < 0) n = 0; else if(n > 99) n = 99; return n;
+}
+
+int
+Play(int nr)
+{
+	int i, last = -1;
+	FromFEN(iniPos + 4); // in XQ iniPos always has just "fen " prefix
+	for(i=0; i<nr; i++) {
+	    int from=Sqr(move[i], 0), to=Sqr(move[i], 2);
+	    if(board[to] || (board[from]|32)  == 'p' && move[i][1] != move[i][3]) last = i;
+	    board[to] = board[from]; board[from] = 0;
+	}
+	return last;
+}
+
+void
 StartSearch(char *ponder)
 {	// send the 'go' command to engine. Suffix by ponder.
-	int nr = moveNr + (ponder[0] != 0); // we ponder for one move ahead!
-	fprintf(toE, "\ngo btime %d wtime %d", stm == BLACK ^ sc=='s' ? myTime : hisTime, stm == WHITE ^ sc=='s' ? myTime : hisTime);
-	DPRINT(    "\n# go btime %d wtime %d", stm == BLACK ^ sc=='s' ? myTime : hisTime, stm == WHITE ^ sc=='s' ? myTime : hisTime);
+	int x = (ponder[0] != 0);                   // during ponder stm is the opponent
+	int black = (stm == BLACK ^ x ^ sc == 's'); // set if our color is what the engine calls black
+	int nr = moveNr + x;                        // we ponder for one move ahead!
+	int t = (flob ? inc + myTime/40 : 1000*byo*(byo>0)); // byoyomi time 
+	if(sc == 'x') black = 1; else drawOffer = 0;// in UCCI 'black' refers to us and 'white' to opponent
+	if(!x && drawOffer) ponder = " draw", drawOffer = 0; //pass draw offer only when not pondering
+	fprintf(toE, "\ngo%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t);
+	DPRINT(    "\n# go%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t);
 	if(sTime > 0) { fprintf(toE, " movetime %d", sTime); DPRINT(" movetime %d", sTime); } else
 	if(mps) { fprintf(toE, " movestogo %d", mps*(nr/(2*mps)+1)-nr/2); DPRINT(" movestogo %d", mps*(nr/(2*mps)+1)-nr/2); }
-	if(inc && !suffix) { fprintf(toE, " winc %d binc %d", inc, inc); DPRINT(" winc %d binc %d", inc, inc); }
+	if(flob || byo >= 0) sprintf(suffix, " byoyomi %d", t); // for engines running purely on byoyomi
+	if(inc && !*suffix) { fprintf(toE, " %s %d %s %d", wInc, inc, bInc, inc); DPRINT(" %s %d %s %d", wInc, inc, bInc, inc); }
 	if(depth > 0) { fprintf(toE, " depth %d", depth); DPRINT(" depth %d", depth); }
-        if(suffix) { fprintf(toE, suffix, inc); DPRINT(suffix, inc); }
-	fprintf(toE, "%s\n", ponder);
-	DPRINT("%s\n", ponder);
+        if(*suffix) { fprintf(toE, suffix, inc); DPRINT(suffix, inc); }
+	fprintf(toE, "\n"); DPRINT("\n");
 }
 
 void
@@ -103,10 +167,25 @@ StopPonder(int pondering)
 void
 LoadPos(int moveNr)
 {
-	int j;
-	fprintf(toE, "%s moves", iniPos);
-	DPRINT(    "# %s moves", iniPos);
-	for(j=0; j<moveNr; j++) { fprintf(toE, " %s", move[j]); DPRINT(" %s", move[j]); }
+	int j, lastCapt = 0; char *pos = iniPos, buf[200], stm;
+	if(sc == 'x') { // UCCI: send only reversible moves
+	    lastCapt = Play(moveNr); // find last capture (returns -1 if none!)
+	    Play(++lastCapt);        // reconstruct board after last capture
+	    stm = (!strstr(iniPos+4, " b ") ^ lastCapt & 1 ? 'w' :  'b');
+	    sprintf(buf, "position fen %s", ToFEN(stm)); pos = buf; // send it as FEN (with "position" in UCCI!)
+	}
+	fprintf(toE, "%s moves", pos);
+	DPRINT(    "# %s moves", pos);
+	for(j=lastCapt; j<moveNr; j++) { fprintf(toE, " %s", move[j]); DPRINT(" %s", move[j]); }
+}
+
+void
+StartPonder()
+{
+	if(!move[moveNr][0]) return; // no ponder move
+	LoadPos(moveNr+1);
+	pondering = 1; lastDepth = 1;
+	StartSearch(" ponder");
 }
 
 char *Convert(char *pv)
@@ -141,48 +220,62 @@ Move4GUI(char *m)
     }
 }
 
+int
+GetChar()
+{
+    int c;
+    if(fromF) {
+	if((c = fgetc(fromF)) != EOF) return c;
+	fclose(fromF); fromF = 0; printf("# end fake\n");
+    }
+    return fgetc(fromE);
+}
+
 void *
 Engine2GUI()
 {
     char line[1024], command[256];
 
+    if(fromF = fopen("DefectiveEngineOptions.ini", "r")) printf("# fake engine input\n");
     while(1) {
 	int i=0, x; char *p, dummy;
 
 	fflush(stdout); fflush(toE);
-	while((line[i] = x = fgetc(fromE)) != EOF && line[i] != '\n') i++;
+	while((line[i] = x = GetChar()) != EOF && line[i] != '\n') i++;
 	line[++i] = 0;
 	if(x == EOF) exit(0);
 	DPRINT("# engine said: %s", line), fflush(stdout);
-	sscanf(line, "%s", command);
+	if(sscanf(line, "%s", command) != 1) continue;
 	if(!strcmp(command, "bestmove")) {
-	    if(pause) { pondering = pause = 0; Sync(WAKEUP); continue; } // bestmove was reply to ponder miss or analysis result; ignore.
+	    if(pause == 1) { pondering = pause = 0; Sync(WAKEUP); continue; } // bestmove was reply to ponder miss or analysis result; ignore.
+	    else if(pondering) { pondering = 0; printf("%d 0 0 0 UCI violation! Engine moves during ponder\n", lastDepth+1); continue; } // ignore ponder search
 	    // move was a move to be played
+	    if(p = strstr(line+8, " draw")) *p = 0, printf("offer draw\n"); // UCCI
 	    if(strstr(line+9, "resign")) { printf("resign\n"); computer = NONE; }
+	    if(strstr(line+9, "win")) { printf("%s {claim}\n", stm== WHITE ? "1-0" :"0-1"); computer = NONE; } // USI
 	    if(strstr(line+9, "(none)") || strstr(line+9, "null") ||
 	       strstr(line+9, "0000")) { printf("%s\n", lastScore < -99999 ? "resign" : "1/2-1/2 {stalemate}"); computer = NONE; }
 	    sscanf(line, "bestmove %s", move[moveNr++]);
 	    myTime -= (GetTickCount() - startTime)*1.02 + inc; // update own clock, so we can give correct wtime, btime with ponder
 	    if(mps && ((moveNr+1)/2) % mps == 0) myTime += tc; if(sTime) myTime = sTime; // new session or move starts
+	    stm = WHITE+BLACK - stm;
 	    // first start a new ponder search, if pondering is on and we have a move to ponder on
 	    if(p = strstr(line+9, "ponder")) {
+	      sscanf(p+7, "%s", move[moveNr]);
 	      if(computer != NONE && ponder) {
-		sscanf(p+7, "%s", move[moveNr]);
 		DPRINT("# ponder on %s\n", move[moveNr]);
-		LoadPos(moveNr+1); // load position
-		// and set engine pondering
-		pondering = 1; lastDepth = 1;
-		StartSearch(" ponder");
+		StartPonder();
 	      }
 	      p[-1] = '\n'; *p = 0; // strip off ponder move
-	    }
+	    } else move[moveNr][0] = 0;
 	    Move4GUI(line+9);
 	    printf("move %s\n", line+9); // send move to GUI
-	    if(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == WHITE ? "1-0" : "0-1"); computer = NONE; }
-	    stm = WHITE+BLACK - stm;
+            if(move[moveNr][0]) printf("Hint: %s\n", move[moveNr]);
+	    if(pause) { pause = 0; Sync(WAKEUP); } // release commands that came in during think
+	    if(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == BLACK ? "1-0" : "0-1"); computer = NONE; }
 	}
 	else if(!strcmp(command, "info")) {
-	    int d=0, s=0, t=0, n=0;
+	    int d=0, s=0, t=(GetTickCount() - startTime)/10, n=1;
 	    char *pv;
 	    if(sscanf(line+5, "string times @ %c", &dummy) == 1) { printf("# %s", line+12); continue; }
 	    if(collect && (pv = strstr(line+5, "currmove "))) {
@@ -217,12 +310,20 @@ Engine2GUI()
 	    if(p = strstr(line+6, " min "))  sscanf(p+1, "min %d", &min), *p = '\n';
 	    if(p = strstr(line+6, " max "))  sscanf(p+1, "max %d", &max), *p = '\n';
 	    if(p = strstr(line+6, " default "))  sscanf(p+1, "default %[^\n]*", val), *p = '\n';
-	    if(p = strstr(line+6, " name ")) sscanf(p+1, "name %[^\n]*", name);
-	    if(!strcmp(name, "Hash") || !strcmp(name, "USI_Hash")) {
+	    if(!(p = strstr(line+6, " name "))) p = line+1; sscanf(p+6, "%[^\n]", name); // 'name' is omitted in UCCI
+	    if(!strcasecmp(name, "UCI_Chess960")) { frc=2; continue; }
+	    if(frc< 0 && (strstr(name, "960") || strcasestr(name, "frc")) && !strcmp(type, "check")) {
+		fprintf(toE, "setoption name %s value true\n", name); strcpy(val, "true"); // set non-standard suspected FRC options
+	    }
+	    if(!strcasecmp(name, "Threads")) { strcpy(threadOpt, name); continue; }
+	    if(!strcasecmp(name, "Ponder") || !strcasecmp(name, "USI_Ponder")) { strcpy(canPonder, name); continue; }
+	    if(!strcasecmp(name, "Hash") || !strcasecmp(name, "USI_Hash") || !strcasecmp(name, "hashsize")) {
 		memory = oldMem = atoi(val); hasHash = 1; 
 		strcpy(hashOpt, name);
 		continue;
 	    }
+	    if(!strcasecmp(name, "newgame") && !strcmp(type, "button")) { newGame++; continue; }
+	    if(!strcasecmp(name, "usemillisec")) { unit = (!strcmp(val, "false") ? 2 : 1); continue; }
 	    // pass on engine-defined option as WB option feature
 	    if(!strcmp(type, "filename")) type[4] = 0;
 	    sprintf(buf, "feature option=\"%s -%s", name, type); q = buf + strlen(buf);
@@ -244,11 +345,17 @@ Engine2GUI()
 	    if(buf[0]) printf("%s", buf);
 	}
 	else if(!strcmp(command, "id")) {
-	    char name[256];
+	    static char name[256], version[256];
 	    if(sscanf(line, "id name %[^\n]", name) == 1) printf("feature myname=\"%s (U%cI2WB)\"\n", name, sc-32);
+	    if(sscanf(line, "id version %[^\n]", version) == 1 && *name) printf("feature myname=\"%s %s (U%cI2WB)\"\n", name, version, sc-32);
 	}
 	else if(!strcmp(command, "readyok")) { pause = 0; Sync(WAKEUP); } // resume processing of GUI commands
-	else if(sscanf(command, "u%ciok", &c)==1 && c==sc)   printf("feature smp=1 memory=%d done=1\n", hasHash), Sync(WAKEUP); // done with options
+	else if(sc == 'x'&& !strcmp(command, "ucciok") || sscanf(command, "u%ciok", &c)==1 && c==sc) {
+	    if(frc) printf("feature variants=\"normal,fischerandom\" oocastle=%d\n", frc<0); // unannounced FRC uses O-O castling
+	    printf("feature smp=1 memory=%d done=1\n", hasHash);
+	    if(unit == 2) unit = 1, fprintf(toE, "setoption usemillisec true\n");
+	    Sync(WAKEUP); // done with options
+	}
     }
 }
 
@@ -266,23 +373,23 @@ Move4Engine(char *m)
       m[2] = 'a'+'0'+size - m[2];
       m[3] = 'a'+'0'+size - m[3];
       if(m[4] == '=') m[4] = 0; // no '=' in USI format!
-      else if(m[4] != '\n') m[4] = '+'; // cater to WB 4.4 bug :-(
+      else if(m[4]) m[4] = '+'; // cater to WB 4.4 bug :-(
     }
 }
 
 void
 GUI2Engine()
 {
-    char line[256], command[256], *p, *q, *r;
+    char line[256], command[256], *p, *q, *r, mySide;
 
     while(1) {
 	int i, x;
 
-	if(computer == stm || computer == ANALYZE) {
+	if((computer == stm || computer == ANALYZE) && !suspended) {
 	    DPRINT("# start search\n");
-	    LoadPos(moveNr); // load position
+	    LoadPos(moveNr); fflush(stdout); // load position
 	    // and set engine thinking (note USI swaps colors!)
-	    startTime = GetTickCount();
+	    startTime = GetTickCount(); mySide = stm; // remember side we last played for
 	    if(computer == ANALYZE) {
 		fprintf(toE, "\ngo infinite"); DPRINT("\n# go infinite");
 		if(sm & 1) { // some moves are disabled
@@ -291,23 +398,24 @@ GUI2Engine()
 		}
 		fprintf(toE, "\n"); DPRINT("\n");
 	    // code for searchmoves goes here
-	    } else StartSearch("");
+	    } else { pause = 2; StartSearch(""); fflush(stdout); fflush(toE); Sync(PAUSE); } // block input during thinking
 	}
       nomove:
 	fflush(toE); fflush(stdout);
 	i = 0; while((x = getchar()) != EOF && (line[i] = x) != '\n') i++;
-	line[++i] = 0; if(x == EOF) { printf("# EOF\n"); exit(-1); }
+	line[++i] = 0; if(x == EOF) { printf("# EOF\n"); fprintf(toE, "quit\n"); exit(-1); }
 	sscanf(line, "%s", command);
 	if(!strcmp(command, "new")) {
-	    computer = BLACK; moveNr = 0; depth = -1;
-	    stm = WHITE; strcpy(iniPos, "position startpos");
-	    if(memory != oldMem && hasHash) fprintf(toE, "setoption name %s value %d\n", hashOpt, memory);
+	    computer = BLACK; moveNr = 0; depth = -1; move[0][0] = 0;
+	    stm = WHITE; strcpy(iniPos, "position startpos"); frc &= ~1;
+	    if(memory != oldMem && hasHash) fprintf(toE, "setoption %s%s %s%d\n", nameWord, hashOpt, valueWord, memory);
 	    oldMem = memory;
 	    // we can set other options here
+	    if(sc == 'x') { if(newGame) fprintf(toE, "setoption newgame\n"); } else // optional in UCCI
 	    pause = 1; // wait for option settings to take effect
-	    fprintf(toE, "isready\n");
-	    fprintf(toE, "u%cinewgame\n", sc); fflush(toE);
+	    fprintf(toE, "isready\n"); fflush(toE);
 	    Sync(PAUSE); // wait for readyok
+	    fprintf(toE, "u%cinewgame\n", sc); fflush(toE);
 	}
 	else if(!strcmp(command, "usermove")) {
 	    sscanf(line, "usermove %s", command); // strips off linefeed
@@ -316,8 +424,10 @@ GUI2Engine()
 	    // when pondering we either continue the ponder search as normal search, or abort it
 	    if(pondering || computer == ANALYZE) {
 		if(pondering && !strcmp(command, move[moveNr])) { // ponder hit
-		    pondering = 0; moveNr++; startTime = GetTickCount(); // clock starts running now
-		    fprintf(toE, "ponderhit\n"); DPRINT("# ponderhit\n");
+		    char *draw = drawOffer ? " draw" : ""; drawOffer = 0;
+		    pondering = 0; pause = 2; moveNr++; startTime = GetTickCount(); // clock starts running now
+		    fprintf(toE, "ponderhit%s\n", draw); DPRINT("# ponderhit%s\n", draw); fflush(toE); fflush(stdout);
+		    Sync(PAUSE); // block input during thinking
 		    goto nomove;
 		}
 		StopPonder(1);
@@ -328,32 +438,36 @@ GUI2Engine()
 	    int sec = 0;
 	    sscanf(line, "level %d %d:%d %d", &mps, &tc, &sec, &inc) == 4 ||
 	    sscanf(line, "level %d %d %d", &mps, &tc, &inc);
-	    tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0;
+	    tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0; tc /= unit; inc /= unit;
 	}
 	else if(!strcmp(command, "option")) {
 	    char name[80], *p;
 	    if(sscanf(line+7, "UCI2WB debug output=%d", &debug) == 1) ; else
+	    if(sscanf(line+7, "Floating Byoyomi=%d", &flob) == 1) ; else
+	    if(sscanf(line+7, "Byoyomi=%d", &byo) == 1) ; else
 	    if(p = strchr(line, '=')) {
 		*p++ = 0;
 		if(strstr(checkOptions, line+7)) sprintf(p, "%s\n", atoi(p) ? "true" : "false");
-		fprintf(toE, "setoption name %s value %s", line+7, p); DPRINT("# setoption name %s value %s", line+7, p);
-	    } else { fprintf(toE, "setoption name %s\n", line+7); DPRINT("# setoption name %s\n", line+7); }
+		fprintf(toE, "setoption name %s value %s", line+7, p); DPRINT("# setoption %s%s %s%s", nameWord, line+7, valueWord, p);
+	    } else { fprintf(toE, "setoption %s%s\n", nameWord, line+7); DPRINT("# setoption %s%s\n", nameWord, line+7); }
 	}
 	else if(!strcmp(command, "protover")) {
 	    if(!variants) variants = sc=='s' ? "shogi,5x5+5_shogi" : VARIANTS;
-	    printf("feature variants=\"%s\" setboard=1 usermove=1 debug=1 ping=1 reuse=0 exclude=1 done=0\n", variants);
+	    printf("feature variants=\"%s\" setboard=1 usermove=1 debug=1 ping=1 reuse=0 exclude=1 pause=1 sigint=0 sigterm=0 done=0\n", variants);
 	    printf("feature option=\"UCI2WB debug output -check %d\"\n", debug);
-	    fprintf(toE, "u%ci\n", sc); fflush(toE); // this prompts UCI engine for options
+	    if(sc == 's') printf("feature option=\"Floating Byoyomi -check %d\"\nfeature option=\"Byoyomi -spin %d -1 1000\"\n", flob, byo);
+	    fprintf(toE, sc == 'x' ? "ucci\n" : "u%ci\n", sc); fflush(toE); // prompt UCI engine for options
 	    Sync(PAUSE); // wait for uciok
 	}
 	else if(!strcmp(command, "setboard")) {
-		if(strstr(line+9, " b ")) stm = BLACK;
+		stm = (strstr(line+9, " b ") ? BLACK : WHITE);
                 if(p = strchr(line+9, '[')) { char c;
                     *p++ = 0; q = strchr(p, ']'); *q = 0; r = q + 4; 
 		    if(sc == 's') q[2] = 'w' + 'b' - q[2], strcpy(r=q+3, " 1\n"); // Shogi: reverse color
 		    else r = strchr(strchr(q+4, ' ') + 1, ' '); // skip to second space (after e.p. square)
 		    *r = 0; sprintf(command, "%s%s %s %s", line+9, q+1, p, r+1);
                 } else strcpy(command, line+9);
+		if(frc == -1 && (p = strchr(command, ' '))) strncpy(p+3, "KQkq", 4); // unannounced FRC
 		sprintf(iniPos, "%s%sfen %s", iniPos[0]=='p' ? "position " : "", sc=='s' ? "s" : "", command);
 		iniPos[strlen(iniPos)-1] = sm = 0; collect = (computer == ANALYZE);
 	}
@@ -361,6 +475,7 @@ GUI2Engine()
 		if(!strcmp(line+8, "shogi\n")) size = 9, strcpy(iniPos, "position startpos");
 		if(!strcmp(line+8, "5x5+5_shogi\n")) size = 5, strcpy(iniPos, "position startpos");
 		if(!strcmp(line+8, "xiangqi\n")) strcpy(iniPos, "fen rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR r");
+		if(!strcmp(line+8, "fischerandom\n")) { frc |= 1; if(frc > 0) fprintf(toE, "setoption name UCI_Chess960 value true\n"); }
 	}
 	else if(!strcmp(command, "undo") && (i=1) || !strcmp(command, "remove") && (i=2)) {
 	    if(pondering || computer == ANALYZE) StopPonder(1);
@@ -377,22 +492,33 @@ GUI2Engine()
 	    if(!(sm & 2)) goto nomove; // no moves enabled; continue current search
 	    if(computer == ANALYZE) StopPonder(1); // abort old analysis
 	}
+	else if(!strcmp(command, "pause")) {
+	    if(computer == stm) myTime -= GetTickCount() - startTime;
+	    suspended = 1 + pondering; // remember if we were pondering, and stop search ignoring bestmove
+	    StopPonder(pondering || computer == stm);
+	}
+	else if(!strcmp(command, "resume")) {
+	    if(suspended == 2) StartPonder(); // restart interrupted ponder search
+	    suspended = 0; // causes thinking to start in normal way if on move or analyzing
+	}
 	else if(!strcmp(command, "xboard")) ;
 	else if(!strcmp(command, "analyze"))computer = ANALYZE, collect = 1, sm = 0;
 	else if(!strcmp(command, "exit"))   computer = NONE, StopPonder(1);
 	else if(!strcmp(command, "force"))  computer = NONE, StopPonder(pondering);
 	else if(!strcmp(command, "go"))     computer = stm;
-	else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  *= 10;
-	else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime *= 10;
+	else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  = (10*myTime)/unit;
+	else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime = (10*hisTime)/unit;
 	else if(!strcmp(command, "post"))   post = 1;
 	else if(!strcmp(command, "nopost")) post = 0;
-	else if(!strcmp(command, "easy"))   ponder = 0;
-	else if(!strcmp(command, "hard"))   ponder = 1;
-	else if(!strcmp(command, "ping"))   pause = 1, fprintf(toE, "isready\n"), fflush(toE), Sync(PAUSE), printf("pong %s", line+5);
+	else if(!strcmp(command, "easy") && !!*canPonder) ponder = 0, StopPonder(pondering), fprintf(toE, "setoption %s%s %sfalse\n", nameWord, canPonder, valueWord);
+	else if(!strcmp(command, "hard") && !!*canPonder) ponder = 1, fprintf(toE, "setoption %s%s %strue\n", nameWord, canPonder, valueWord), StartPonder();
+	else if(!strcmp(command, "ping"))   { /* static int done; if(!done) pause = 1, fprintf(toE, "isready\n"), fflush(toE), printf("# send isready\n"), fflush(stdout), Sync(PAUSE); done = 1;*/ printf("po%s", line+2); }
 	else if(!strcmp(command, "memory")) sscanf(line, "memory %d", &memory);
-	else if(!strcmp(command, "cores"))  sscanf(line, "cores %d", &cores);
+	else if(!strcmp(command, "cores")&& !!*threadOpt) sscanf(line, "cores %d", &cores), fprintf(toE, "setoption %s%s %s%d\n", nameWord, threadOpt, valueWord, cores);
 	else if(!strcmp(command, "sd"))     sscanf(line, "sd %d", &depth);
-	else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0;
+	else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0, sTime /= unit;
+	else if(!strcmp(command, "offer"))  drawOffer = 1;
+	else if(!strcmp(command, "result")) { if(sc == 's') fprintf(toE, "gameover %s\n", line[8] == '/' ? "draw" : (line[7] == '0') == mySide ? "win" : "lose"); }
 	else if(!strcmp(command, "quit"))   fprintf(toE, "quit\n"), fflush(toE), exit(0);
     }
 }
@@ -492,7 +618,11 @@ main(int argc, char **argv)
 	if(argc > 1 && argv[1][0] == '-') { sc = argv[1][1]; argc--; argv++; }
 	if(argc < 2) { printf("usage is: U%cI2WB [debug] [-s] <engine.exe> [<engine directory>]\n", sc-32); exit(-1); }
 	if(argc > 2) dir = argv[2];
-        if(argc > 3) suffix = argv[3];
+        if(argc > 3) strncpy(suffix, argv[3], 80);
+
+        if(sc == 'x') nameWord = valueWord = bTime = "", wTime = "opp", bInc = "increment", wInc = "oppincrement", unit = 1000; // switch to UCCI keywords
+	else if(sc == 'f' ) frc = -1, sc = 'c';   // UCI for unannounced Chess960
+	else if(sc == 'n') sc = 'c'; // UCI for normal Chess
 
 	// spawn engine proc
 	if(StartEngine(argv[1], dir) != NO_ERROR) { perror(argv[1]), exit(-1); }
@@ -503,7 +633,7 @@ main(int argc, char **argv)
 #ifdef WIN32
 	CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Engine2GUI, (LPVOID) NULL, 0, &thread_id);
 #else
-        { pthread_t t; signal(SIGINT, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
+        { pthread_t t; signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
 #endif
 
 	// handle GUI->engine traffic in original thread