template<CastlingRight Cr, bool Checks, bool Chess960>
ExtMove* generate_castling(const Position& pos, ExtMove* moveList, Color us) {
- static const bool KingSide = (Cr == WHITE_OO || Cr == BLACK_OO);
+ constexpr bool KingSide = (Cr == WHITE_OO || Cr == BLACK_OO);
if (pos.castling_impeded(Cr) || !pos.can_castle(Cr))
return moveList;
assert(!pos.checkers());
- const Direction K = Chess960 ? kto > kfrom ? WEST : EAST
- : KingSide ? WEST : EAST;
+ const Direction step = Chess960 ? kto > kfrom ? WEST : EAST
+ : KingSide ? WEST : EAST;
- for (Square s = kto; s != kfrom; s += K)
+ for (Square s = kto; s != kfrom; s += step)
if (pos.attackers_to(s) & enemies)
return moveList;
// Compute our parametrized parameters at compile time, named according to
// the point of view of white side.
- const Color Them = (Us == WHITE ? BLACK : WHITE);
- const Bitboard TRank8BB = (Us == WHITE ? Rank8BB : Rank1BB);
- const Bitboard TRank7BB = (Us == WHITE ? Rank7BB : Rank2BB);
- const Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
- const Direction Up = (Us == WHITE ? NORTH : SOUTH);
- const Direction UpRight = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
- const Direction UpLeft = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
+ constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
+ constexpr Bitboard TRank8BB = (Us == WHITE ? Rank8BB : Rank1BB);
+ constexpr Bitboard TRank7BB = (Us == WHITE ? Rank7BB : Rank2BB);
+ constexpr Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
+ constexpr Direction Up = (Us == WHITE ? NORTH : SOUTH);
+ constexpr Direction UpRight = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
+ constexpr Direction UpLeft = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
Bitboard emptySquares;
// if the pawn is not on the same file as the enemy king, because we
// don't generate captures. Note that a possible discovery check
// promotion has been already generated amongst the captures.
- Bitboard dcCandidates = pos.discovered_check_candidates();
+ Bitboard dcCandidates = pos.blockers_for_king(Them);
if (pawnsNotOn7 & dcCandidates)
{
Bitboard dc1 = shift<Up>(pawnsNotOn7 & dcCandidates) & emptySquares & ~file_bb(ksq);
&& !(PseudoAttacks[Pt][from] & target & pos.check_squares(Pt)))
continue;
- if (pos.discovered_check_candidates() & from)
+ if (pos.blockers_for_king(~us) & from)
continue;
}
template<Color Us, GenType Type>
ExtMove* generate_all(const Position& pos, ExtMove* moveList, Bitboard target) {
- const bool Checks = Type == QUIET_CHECKS;
+ constexpr bool Checks = Type == QUIET_CHECKS;
moveList = generate_pawn_moves<Us, Type>(pos, moveList, target);
moveList = generate_moves<KNIGHT, Checks>(pos, moveList, Us, target);
assert(!pos.checkers());
Color us = pos.side_to_move();
- Bitboard dc = pos.discovered_check_candidates();
+ Bitboard dc = pos.blockers_for_king(~us) & pos.pieces(us);
while (dc)
{
template<>
ExtMove* generate<LEGAL>(const Position& pos, ExtMove* moveList) {
- Bitboard pinned = pos.pinned_pieces(pos.side_to_move());
- Square ksq = pos.square<KING>(pos.side_to_move());
+ Color us = pos.side_to_move();
+ Bitboard pinned = pos.blockers_for_king(us) & pos.pieces(us);
+ Square ksq = pos.square<KING>(us);
ExtMove* cur = moveList;
moveList = pos.checkers() ? generate<EVASIONS >(pos, moveList)