/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2020 The Stockfish developers (see AUTHORS file)
+ Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
// En passant captures are a tricky special case. Because they are rather
// uncommon, we do it simply by testing whether the king is attacked after
// the move is made.
- if (type_of(m) == ENPASSANT)
+ if (type_of(m) == EN_PASSANT)
{
Square ksq = square<KING>(us);
Square capsq = to - pawn_push(us);
Piece pc = moved_piece(m);
// Use a slower but simpler function for uncommon cases
+ // yet we skip the legality check of MoveList<LEGAL>().
if (type_of(m) != NORMAL)
- return MoveList<LEGAL>(*this).contains(m);
+ return checkers() ? MoveList< EVASIONS>(*this).contains(m)
+ : MoveList<NON_EVASIONS>(*this).contains(m);
// Is not a promotion, so promotion piece must be empty
if (promotion_type(m) - KNIGHT != NO_PIECE_TYPE)
// of direct checks and ordinary discovered check, so the only case we
// need to handle is the unusual case of a discovered check through
// the captured pawn.
- case ENPASSANT:
+ case EN_PASSANT:
{
Square capsq = make_square(file_of(to), rank_of(from));
Bitboard b = (pieces() ^ from ^ capsq) | to;
Square from = from_sq(m);
Square to = to_sq(m);
Piece pc = piece_on(from);
- Piece captured = type_of(m) == ENPASSANT ? make_piece(them, PAWN) : piece_on(to);
+ Piece captured = type_of(m) == EN_PASSANT ? make_piece(them, PAWN) : piece_on(to);
assert(color_of(pc) == us);
assert(captured == NO_PIECE || color_of(captured) == (type_of(m) != CASTLING ? them : us));
// update non-pawn material.
if (type_of(captured) == PAWN)
{
- if (type_of(m) == ENPASSANT)
+ if (type_of(m) == EN_PASSANT)
{
capsq -= pawn_push(us);
// Update board and piece lists
remove_piece(capsq);
- if (type_of(m) == ENPASSANT)
+ if (type_of(m) == EN_PASSANT)
board[capsq] = NO_PIECE;
// Update material hash key and prefetch access to materialTable
// If the moving piece is a pawn do some special extra work
if (type_of(pc) == PAWN)
{
- // Set en-passant square if the moved pawn can be captured
+ // Set en passant square if the moved pawn can be captured
if ( (int(to) ^ int(from)) == 16
&& (pawn_attacks_bb(us, to - pawn_push(us)) & pieces(them, PAWN)))
{
{
Square capsq = to;
- if (type_of(m) == ENPASSANT)
+ if (type_of(m) == EN_PASSANT)
{
capsq -= pawn_push(us);
}
st->key ^= Zobrist::side;
- prefetch(TT.first_entry(st->key));
+ prefetch(TT.first_entry(key()));
++st->rule50;
st->pliesFromNull = 0;
/// Position::key_after() computes the new hash key after the given move. Needed
/// for speculative prefetch. It doesn't recognize special moves like castling,
-/// en-passant and promotions.
+/// en passant and promotions.
Key Position::key_after(Move m) const {
assert(is_ok(m));
- // Only deal with normal moves, assume others pass a simple see
+ // Only deal with normal moves, assume others pass a simple SEE
if (type_of(m) != NORMAL)
return VALUE_ZERO >= threshold;