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check the entry after tt move in tt cut #321

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check the entry after tt move in tt cut #321

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c72655d
stuff
xu-shawn Nov 9, 2025
adf5930
take 2
xu-shawn Nov 9, 2025
33669c8
la
xu-shawn Nov 12, 2025
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24 changes: 23 additions & 1 deletion src/search.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -415,7 +415,29 @@ Value Worker::search(
&& (tt_data->bound() == Bound::Exact
|| (tt_data->bound() == Bound::Lower && tt_data->score >= beta)
|| (tt_data->bound() == Bound::Upper && tt_data->score <= alpha))) {
return tt_data->score;
if (depth <= 7) {
return tt_data->score;
}

if (tt_data->move == Move::none()) {
return tt_data->score;
}

MoveGen movegen{pos};
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@TheRealGioviok TheRealGioviok Nov 11, 2025

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Would be nice to reuse this later in search.


if (movegen.is_legal(tt_data->move)) {
Position pos_after = pos.move(tt_data->move, m_td.push_psqt_state());
auto tt_data_after = m_searcher.tt.probe(pos_after, ply);
m_td.pop_psqt_state();

if (!tt_data_after) {
return tt_data->score;
}

if ((tt_data->score >= beta) == (tt_data_after->score <= -beta)) {
return tt_data->score;
}
}
}

// Update ttpv
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