Keep track of virginity of back-rank pieces in variant seirawan

[xboard.git] / moves.c

diff --git a/moves.c b/moves.c
index a458a84..5f4b3f9 100644 (file)
--- a/moves.c
+++ b/moves.c
@@ -146,7 +146,8 @@ CopyBoard (Board to, Board from)
     for (i = 0; i < BOARD_HEIGHT; i++)
       for (j = 0; j < BOARD_WIDTH; j++)
        to[i][j] = from[i][j];
-    for (j = 0; j < BOARD_FILES-1; j++) // [HGM] gamestate: copy castling rights and ep status
+    for (j = 0; j < BOARD_FILES; j++) // [HGM] gamestate: copy castling rights and ep status
+       to[VIRGIN][j] = from[VIRGIN][j],
        to[CASTLING][j] = from[CASTLING][j];
     to[HOLDINGS_SET] = 0; // flag used in ICS play
 }
@@ -1127,9 +1128,11 @@ LegalityTest (Board board, int flags, int rf, int ff, int rt, int ft, int promoC
     if(gameInfo.variant == VariantSChess && promoChar && promoChar != '=' && board[rf][ff] != WhitePawn && board[rf][ff] != BlackPawn) {
         if(board[rf][ff] < BlackPawn) { // white
             if(rf != 0) return IllegalMove; // must be on back rank
+            if(!(board[VIRGIN][ff] & VIRGIN_W)) return IllegalMove; // non-virgin
             if(board[PieceToNumber(CharToPiece(ToUpper(promoChar)))][BOARD_WIDTH-2] == 0) return ImpossibleMove;// must be in stock
         } else {
             if(rf != BOARD_HEIGHT-1) return IllegalMove;
+            if(!(board[VIRGIN][ff] & VIRGIN_B)) return IllegalMove; // non-virgin
             if(board[BOARD_HEIGHT-1-PieceToNumber(CharToPiece(ToLower(promoChar)))][1] == 0) return ImpossibleMove;
         }
     } else
@@ -1356,9 +1359,11 @@ Disambiguate (Board board, int flags, DisambiguateClosure *closure)
     if(gameInfo.variant == VariantSChess && c && c != '=' && closure->piece != WhitePawn && closure->piece != BlackPawn) {
         if(closure->piece < BlackPawn) { // white
             if(closure->rf != 0) closure->kind = IllegalMove; // must be on back rank
+            if(!(board[VIRGIN][closure->ff] & VIRGIN_W)) closure->kind = IllegalMove; // non-virgin
             if(board[PieceToNumber(CharToPiece(ToUpper(c)))][BOARD_WIDTH-2] == 0) closure->kind = ImpossibleMove;// must be in stock
         } else {
             if(closure->rf != BOARD_HEIGHT-1) closure->kind = IllegalMove;
+            if(!(board[VIRGIN][closure->ff] & VIRGIN_B)) closure->kind = IllegalMove; // non-virgin
             if(board[BOARD_HEIGHT-1-PieceToNumber(CharToPiece(ToLower(c)))][1] == 0) closure->kind = ImpossibleMove;
         }
     } else