virtual inline void DoFutilityPruning01(
bool& isContinue,
bool& INCHECK,
bool& givesCheck,
Move& move,
Move& ttMove,
ScoreIndex& futilityScore,
ScoreIndex& futilityBase,
Position& pos,
ScoreIndex& beta,
ScoreIndex& bestScore,
const Depth depth
)const override {
// 非PVノードのとき☆（＾ｑ＾）
if (!INCHECK // 駒打ちは王手回避のみなので、ここで弾かれる。
&& !givesCheck
&& move != ttMove)
{
futilityScore =
futilityBase + PieceScore::GetCapturePieceScore(pos.GetPiece(move.To()));
if (move.IsPromotion()) {
futilityScore += PieceScore::GetPromotePieceScore(move.GetPieceTypeFrom());
}
if (futilityScore < beta) {
bestScore = std::max(bestScore, futilityScore);
isContinue = true;
return;
}
// todo: ＭｏｖｅＰｉｃｋｅｒ のオーダリングで SEE してるので、ここで SEE するの勿体無い。
if (futilityBase < beta
&& depth < Depth0
&&
(
pos.GetTurn()==Color::Black
?
pos.GetSee1<Color::Black,Color::White>(move, beta - futilityBase)
:
pos.GetSee1<Color::White,Color::Black>(move, beta - futilityBase)
)
<= ScoreZero)
{
bestScore = std::max(bestScore, futilityBase);
isContinue = true;
return;
}
}
}
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;
}
MoveAndScoreIndex Book::GetProbe(const Position& position, const std::string& fName, const bool pickBest) {
BookEntry entry;
u16 best = 0;
u32 sum = 0;
Move move = g_MOVE_NONE;//該当なしのときに使う値☆
const Key key = this->GetBookKey(position);
const ScoreIndex min_book_score = static_cast<ScoreIndex>(static_cast<int>(position.GetRucksack()->m_engineOptions["Min_Book_Score"]));
ScoreIndex score = ScoreZero;
if (this->m_fileName_ != fName && !this->OpenBook(fName.c_str())) {
// 定跡ファイルが開けなかった場合☆
return MoveAndScoreIndex(g_MOVE_NONE, ScoreNone);
}
Binary_search(key);
// 現在の局面における定跡手の数だけループする。
while (read(reinterpret_cast<char*>(&entry), sizeof(entry)), entry.m_key == key && good()) {
best = std::max(best, entry.m_count);
sum += entry.m_count;
// 指された確率に従って手が選択される。
// count が大きい順に並んでいる必要はない。
if (min_book_score <= entry.m_score
&& ((m_random_.GetRandom() % sum < entry.m_count)
|| (pickBest && entry.m_count == best)))
{
const Move tmp = Move(entry.m_fromToPro);
const Square to = tmp.To();
if (tmp.IsDrop()) {
const PieceType ptDropped = tmp.GetPieceTypeDropped();
move = ConvMove::Convert30_MakeDropMove_da(ConvMove::FROM_PIECETYPE_DA10(ptDropped), to);
}
else {
// 定跡の手（持ち駒以外）を、ムーブの書式に変換している？？（＾ｑ＾）？
const Square from = tmp.From();
const Move fromMove = ConvMove::FROM_PIECETYPE_ONBOARD10(ConvPiece::TO_PIECE_TYPE10(position.GetPiece(from)));
if (tmp.IsPromotion()) {
move = UtilMovePos::BUILD_CARD_CAPTURE_PROMOTE(position,fromMove, from, to);
}
else {
move = UtilMovePos::BUILD_CARD_CAPTURE(position, fromMove, from, to);
}
}
score = entry.m_score;
}
}
return MoveAndScoreIndex(move, score);
}