X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=moves.c;h=7ffe59df8517cb72390671185ed9cfc713c1c1c5;hb=e6e38912837a4fe2464356408d10dee950b3121c;hp=fa41620624525080c8bb99497b8dc951af4dfee8;hpb=f111a0eab598dd35c865985f85a93955f4fe5b3e;p=xboard.git

diff --git a/moves.c b/moves.c
index fa41620..7ffe59d 100644
--- a/moves.c
+++ b/moves.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
  *
@@ -1224,6 +1224,7 @@ GenLegal (Board board, int  flags, MoveCallback callback, VOIDSTAR closure, Ches
             if(ff <= BOARD_LEFT+2) { left = ff+1; right = BOARD_LEFT+3; }
             for(k=left; k<=right && ft != NoRights; k++) /* first test if blocked */
                 if(k != ft && board[0][k] != EmptySquare) ft = NoRights;
+            if(ft == 0 && ff != 1 && board[0][1] != EmptySquare) ft = NoRights; /* Rook can be blocked on b1 */
             if(ff > BOARD_LEFT+2)
             for(k=left+1; k<=right && ft != NoRights; k++) /* then if not checked */
                 if(!ignoreCheck && CheckTest(board, flags, 0, ff, 0, k, FALSE)) ft = NoRights;
@@ -1250,6 +1251,7 @@ GenLegal (Board board, int  flags, MoveCallback callback, VOIDSTAR closure, Ches
             if(ff <= BOARD_LEFT+2) { left = ff+1; right = BOARD_LEFT+3; }
             for(k=left; k<=right && ft != NoRights; k++) /* first test if blocked */
                 if(k != ft && board[BOARD_HEIGHT-1][k] != EmptySquare) ft = NoRights;
+            if(ft == 0 && ff != 1 && board[BOARD_HEIGHT-1][1] != EmptySquare) ft = NoRights; /* Rook can be blocked on b8 */
             if(ff > BOARD_LEFT+2)
             for(k=left+1; k<=right && ft != NoRights; k++) /* then if not checked */
                 if(!ignoreCheck && CheckTest(board, flags, BOARD_HEIGHT-1, ff, BOARD_HEIGHT-1, k, FALSE)) ft = NoRights;
@@ -1310,6 +1312,15 @@ CheckTest (Board board, int flags, int rf, int ff, int rt, int ft, int enPassant
         king = flags & F_WHITE_ON_MOVE ? WhiteWazir : BlackWazir;
     if(gameInfo.variant == VariantKnightmate)
         king = flags & F_WHITE_ON_MOVE ? WhiteUnicorn : BlackUnicorn;
+    if(gameInfo.variant == VariantChu) { // strictly speaking this is not needed, as Chu officially has no check
+	int r, f, k = king, royals=0, prince = flags & F_WHITE_ON_MOVE ? WhiteMonarch : BlackMonarch;
+	for(r=0; r<BOARD_HEIGHT; r++) for(f=BOARD_LEFT; f<BOARD_RGHT; f++) {
+	    if(board[r][f] == k || board[r][f] == prince) {
+		if(++royals > 1) return FALSE; // no check if we have two royals (ignores double captureby Lion!)
+		king = board[r][f]; // remember hich one we had
+	    }
+	}
+    }
 
     if (rt >= 0) {
 	if (enPassant) {
@@ -1618,7 +1629,7 @@ MateTest (Board board, int flags)
 	else if(gameInfo.variant == VariantGiveaway) return MT_STEALMATE; // no check exists, stalemated = win
 
         return inCheck ? MT_CHECKMATE
-		       : (gameInfo.variant == VariantXiangqi || gameInfo.variant == VariantShatranj || gameInfo.variant == VariantShogi) ?
+		       : (gameInfo.variant == VariantXiangqi || gameInfo.variant == VariantShatranj || IS_SHOGI(gameInfo.variant)) ?
 			  MT_STAINMATE : MT_STALEMATE;
     }
 }