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Fix SAN disambiguation bug

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Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2011-05-29 10:47:13 +01:00
parent 70125a3be0
commit 462a39ec49
1 changed files with 13 additions and 8 deletions
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15
src/move.cpp
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@ -115,12 +115,14 @@ const string move_to_san(Position& pos, Move m) {
// Collect all legal moves of piece type 'pt' with destination 'to' // Collect all legal moves of piece type 'pt' with destination 'to'
MoveStack* last = generate<MV_LEGAL>(pos, mlist); MoveStack* last = generate<MV_LEGAL>(pos, mlist);
int f = 0, r = 0; int f = 0, r = 0, cnt = 0;
for (MoveStack* cur = mlist; cur != last; cur++) for (MoveStack* cur = mlist; cur != last; cur++)
if ( move_to(cur->move) == to if ( move_to(cur->move) == to
&& pos.type_of_piece_on(move_from(cur->move)) == pt) && pos.type_of_piece_on(move_from(cur->move)) == pt)
{ {
cnt++;
if (square_file(move_from(cur->move)) == square_file(from)) if (square_file(move_from(cur->move)) == square_file(from))
f++; f++;
@ -128,16 +130,19 @@ const string move_to_san(Position& pos, Move m) {
r++; r++;
} }
assert(f > 0 && r > 0); assert(cnt > 0 && f > 0 && r > 0);
// Disambiguation if we have more then one piece with destination 'to' // Disambiguation if we have more then one piece with destination 'to'
if (f == 1 && r > 1) if (cnt > 1)
{
if (f == 1)
san += file_to_char(square_file(from)); san += file_to_char(square_file(from));
else if (f > 1 && r == 1) else if (r == 1)
san += rank_to_char(square_rank(from)); san += rank_to_char(square_rank(from));
else if (f > 1 && r > 1) else
san += square_to_string(from); san += square_to_string(from);
} }
}
if (pos.move_is_capture(m)) if (pos.move_is_capture(m))
{ {