void DirecDiagNESW::Do2Move(Position& position, Square from, const Square ksq, const Color us) const {
const PieceTypeEvent ptEvent1(position.GetOccupiedBB(), Color::Null, ksq);
position.GetStateInfo()->m_checkersBB |=
PiecetypePrograms::m_BISHOP.GetAttacks2From(ptEvent1) &
(
us == Color::Black
?
position.GetBbOf30<Color::Black>(PieceType::N05_Bishop, PieceType::N13_Horse)
:
position.GetBbOf30<Color::White>(PieceType::N05_Bishop, PieceType::N13_Horse)
)
;
}
Key Book::GetBookKey(const Position& pos) {
Key key = 0;
Bitboard bb = pos.GetOccupiedBB();
while (bb.Exists1Bit()) {
const Square sq = bb.PopFirstOneFromI9();
key ^= m_ZobPiece[pos.GetPiece(sq)][sq];
}
const Hand hand = pos.GetHand(pos.GetTurn());
for (HandPiece hp = HPawn; hp < HandPieceNum; ++hp) {
key ^= m_ZobHand[hp][hand.NumOf(hp)];
}
if (pos.GetTurn() == White) {
key ^= m_ZobTurn;
}
return key;
}