From 0395f743108b8ef1c43b36c2a0314ee155d45f18 Mon Sep 17 00:00:00 2001 From: H.G. Muller Date: Fri, 15 Jan 2010 14:32:21 +0100 Subject: [PATCH] Fix reading castling rights FEN in knightmate and twokings Scanning for a King on the back-rank did not work in these variants, because either the Unicorn castles, or there might be two Kings there. --- backend.c | 16 ++++++++++++---- 1 files changed, 12 insertions(+), 4 deletions(-) diff --git a/backend.c b/backend.c index 571ff13..a220324 100644 --- a/backend.c +++ b/backend.c @@ -13900,10 +13900,12 @@ ParseFEN(board, blackPlaysFirst, fen) } /* assume possible unless obviously impossible */ if(initialRights[0]>=0 && board[castlingRank[0]][initialRights[0]] != WhiteRook) FENcastlingRights[0] = -1; if(initialRights[1]>=0 && board[castlingRank[1]][initialRights[1]] != WhiteRook) FENcastlingRights[1] = -1; - if(initialRights[2]>=0 && board[castlingRank[2]][initialRights[2]] != WhiteKing) FENcastlingRights[2] = -1; + if(initialRights[2]>=0 && board[castlingRank[2]][initialRights[2]] != WhiteUnicorn + && board[castlingRank[2]][initialRights[2]] != WhiteKing) FENcastlingRights[2] = -1; if(initialRights[3]>=0 && board[castlingRank[3]][initialRights[3]] != BlackRook) FENcastlingRights[3] = -1; if(initialRights[4]>=0 && board[castlingRank[4]][initialRights[4]] != BlackRook) FENcastlingRights[4] = -1; - if(initialRights[5]>=0 && board[castlingRank[5]][initialRights[5]] != BlackKing) FENcastlingRights[5] = -1; + if(initialRights[5]>=0 && board[castlingRank[5]][initialRights[5]] != BlackUnicorn + && board[castlingRank[5]][initialRights[5]] != BlackKing) FENcastlingRights[5] = -1; FENrulePlies = 0; while(*p==' ') p++; @@ -13924,9 +13926,15 @@ ParseFEN(board, blackPlaysFirst, fen) if(board[BOARD_HEIGHT-1][i] == BlackKing) blackKingFile = i; if(board[0 ][i] == WhiteKing) whiteKingFile = i; } + if(gameInfo.variant == VariantTwoKings || gameInfo.variant == VariantKnightmate) + whiteKingFile = blackKingFile = BOARD_WIDTH >> 1; // scanning fails in these variants + if(whiteKingFile<0 || board[0][whiteKingFile]!=WhiteUnicorn + && board[0][whiteKingFile]!=WhiteKing) whiteKingFile = -1; + if(blackKingFile<0 || board[BOARD_HEIGHT-1][blackKingFile]!=BlackUnicorn + && board[BOARD_HEIGHT-1][blackKingFile]!=BlackKing) blackKingFile = -1; switch(c) { case'K': - for(i=BOARD_RGHT-1; board[0][i]!=WhiteRook && i>whiteKingFile; i--); + for(i=BOARD_RGHT-1; i>whiteKingFile && board[0][i]!=WhiteRook; i--); FENcastlingRights[0] = i != whiteKingFile ? i : -1; FENcastlingRights[2] = whiteKingFile; break; @@ -13936,7 +13944,7 @@ ParseFEN(board, blackPlaysFirst, fen) FENcastlingRights[2] = whiteKingFile; break; case'k': - for(i=BOARD_RGHT-1; board[BOARD_HEIGHT-1][i]!=BlackRook && i>blackKingFile; i--); + for(i=BOARD_RGHT-1; i>blackKingFile && board[BOARD_HEIGHT-1][i]!=BlackRook; i--); FENcastlingRights[3] = i != blackKingFile ? i : -1; FENcastlingRights[5] = blackKingFile; break; -- 1.7.0.4