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Rewrite generate_pawn_moves() and simplify evasions

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Big cleanup and semplification of pawns evasions that
now are pseudo-legal as the remaining moves. This
allow us to remove a lot of tricky code.

Verified against perft: no functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-11-03 12:29:07 +01:00
parent deecb3757c
commit 0855d93de8
6 changed files with 118 additions and 188 deletions
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8
src/position.cpp
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@@ -458,13 +458,6 @@ void Position::find_checkers() {
/// Position::pl_move_is_legal() tests whether a pseudo-legal move is legal
bool Position::pl_move_is_legal(Move m) const {
// If we're in check, all pseudo-legal moves are legal, because our
// check evasion generator only generates true legal moves.
return is_check() || pl_move_is_legal(m, pinned_pieces(side_to_move()));
}
bool Position::pl_move_is_legal(Move m, Bitboard pinned) const {
assert(is_ok());
@@ -1337,7 +1330,6 @@ int Position::see(Square from, Square to) const {
Bitboard attackers, stmAttackers, b;
assert(!shortcut || from != SQ_NONE);
assert(square_is_ok(from) || from == SQ_NONE);
assert(square_is_ok(to));