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Better castle move detector in move_to_san()

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Merged from iPhone Glaurung.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-03-22 14:32:00 +01:00
parent b82c3021fa
commit 66d165921d
1 changed files with 12 additions and 7 deletions
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19
src/san.cpp
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@ -70,23 +70,28 @@ const std::string move_to_san(const Position& pos, Move m) {
assert(pos.is_ok());
assert(move_is_ok(m));
Square from, to;
PieceType pt;
from = move_from(m);
to = move_to(m);
pt = type_of_piece(pos.piece_on(move_from(m)));
std::string san = "";
if (m == MOVE_NONE)
return "(none)";
else if (m == MOVE_NULL)
return "(null)";
else if (move_is_long_castle(m))
else if (move_is_long_castle(m) || (int(to - from) == -2 && pt == KING))
san = "O-O-O";
else if (move_is_short_castle(m))
else if (move_is_short_castle(m) || (int(to - from) == 2 && pt == KING))
san = "O-O";
else
{
Piece pc = pos.piece_on(move_from(m));
if (type_of_piece(pc) != PAWN)
if (pt != PAWN)
{
san += piece_type_to_char(type_of_piece(pc), true);
Square from = move_from(m);
san += piece_type_to_char(pt, true);
switch (move_ambiguity(pos, m)) {
case AMBIGUITY_NONE:
break;
@ -105,7 +110,7 @@ const std::string move_to_san(const Position& pos, Move m) {
}
if (pos.move_is_capture(m))
{
if (type_of_piece(pc) == PAWN)
if (pt == PAWN)
san += file_to_char(square_file(move_from(m)));
san += "x";
}