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Checking for rook color when setting castling

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In Chess960 we can have legal positions with
opponent rook in A or H file and with castling
available, for instance:

4k3/pppppppp/8/8/8/8/PPPPPPPP/rR2K3 w Q - 0 1

In those cases we pick up the wrong rook when
setting castling.

Fix it by checking the color of the rook.

Bug reported by Matthew Lai.

No functional change.
This commit is contained in:
Marco Costalba 2015-05-29 05:38:40 +02:00
parent 8e95c39bfa
commit 2795aedbc3
1 changed files with 3 additions and 2 deletions
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5
src/position.cpp
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@ -266,14 +266,15 @@ void Position::set(const string& fenStr, bool isChess960, Thread* th) {
{ {
Square rsq; Square rsq;
Color c = islower(token) ? BLACK : WHITE; Color c = islower(token) ? BLACK : WHITE;
Piece rook = make_piece(c, ROOK);
token = char(toupper(token)); token = char(toupper(token));
if (token == 'K') if (token == 'K')
for (rsq = relative_square(c, SQ_H1); type_of(piece_on(rsq)) != ROOK; --rsq) {} for (rsq = relative_square(c, SQ_H1); piece_on(rsq) != rook; --rsq) {}
else if (token == 'Q') else if (token == 'Q')
for (rsq = relative_square(c, SQ_A1); type_of(piece_on(rsq)) != ROOK; ++rsq) {} for (rsq = relative_square(c, SQ_A1); piece_on(rsq) != rook; ++rsq) {}
else if (token >= 'A' && token <= 'H') else if (token >= 'A' && token <= 'H')
rsq = make_square(File(token - 'A'), relative_rank(c, RANK_1)); rsq = make_square(File(token - 'A'), relative_rank(c, RANK_1));