Allow use of second-row pieces for non-promoted in drop games

[xboard.git] / backend.c

diff --git a/backend.c b/backend.c
index 24558d5..b248d03 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -6986,7 +6986,7 @@ UserMoveEvent(int fromX, int fromY, int toX, int toY, int promoChar)
           // holdings might not be sent yet in ICS play; we have to figure out which piece belongs here
           if(fromX == 0) fromY = BOARD_HEIGHT-1 - fromY; // black holdings upside-down
           fromX = fromX ? WhitePawn : BlackPawn; // first piece type in selected holdings
-          while(PieceToChar(fromX) == '.' || PieceToNumber(fromX) != fromY && fromX != (int) EmptySquare) fromX++;
+          while(PieceToChar(fromX) == '.' || PieceToChar(fromX) == '+' || PieceToNumber(fromX) != fromY && fromX != (int) EmptySquare) fromX++;
          fromY = DROP_RANK;
     }
 
@@ -9975,6 +9975,7 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
     /* FRC castling assumed when king captures friendly rook. [HGM] or RxK for S-Chess */
     if (board[fromY][fromX] == WhiteKing && board[toY][toX] == WhiteRook ||
         board[fromY][fromX] == WhiteRook && board[toY][toX] == WhiteKing) {
+      board[EP_STATUS] = EP_NONE; // capture was fake!
       board[fromY][fromX] = EmptySquare;
       board[toY][toX] = EmptySquare;
       if((toX > fromX) != (piece == WhiteRook)) {
@@ -9984,6 +9985,7 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
       }
     } else if (board[fromY][fromX] == BlackKing && board[toY][toX] == BlackRook ||
                board[fromY][fromX] == BlackRook && board[toY][toX] == BlackKing) {
+      board[EP_STATUS] = EP_NONE;
       board[fromY][fromX] = EmptySquare;
       board[toY][toX] = EmptySquare;
       if((toX > fromX) != (piece == BlackRook)) {
@@ -10147,8 +10149,8 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
         p = (int) captured;
         if (p >= (int) BlackPawn) {
           p -= (int)BlackPawn;
-          if(gameInfo.variant == VariantShogi && DEMOTED p >= 0) {
-                  /* in Shogi restore piece to its original  first */
+          if(DEMOTED p >= 0 && PieceToChar(p) == '+') {
+                  /* Restore shogi-promoted piece to its original  first */
                   captured = (ChessSquare) (DEMOTED captured);
                   p = DEMOTED p;
           }
@@ -10158,7 +10160,7 @@ ApplyMove (int fromX, int fromY, int toX, int toY, int promoChar, Board board)
           board[p][BOARD_WIDTH-1] = BLACK_TO_WHITE captured;
        } else {
           p -= (int)WhitePawn;
-          if(gameInfo.variant == VariantShogi && DEMOTED p >= 0) {
+          if(DEMOTED p >= 0 && PieceToChar(p) == '+') {
                   captured = (ChessSquare) (DEMOTED captured);
                   p = DEMOTED p;
           }
@@ -14657,8 +14659,10 @@ TwoMachinesEvent P((void))
 
     if(!SupportedVariant(second.variants, gameInfo.variant, gameInfo.boardWidth,
                          gameInfo.boardHeight, gameInfo.holdingsSize, second.protocolVersion, second.tidy)) {
-       startingEngine = FALSE;
+       startingEngine = matchMode = FALSE;
        DisplayError("second engine does not play this", 0);
+       gameMode = TwoMachinesPlay; ModeHighlight(); // Needed to make sure menu item is unchecked
+       EditGameEvent(); // switch back to EditGame mode
        return;
     }