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Guard against using TB and mate scores as eval #730

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Nov 15, 2024
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Guard against using TB and mate scores as eval #730

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2 changes: 1 addition & 1 deletion src/search.c
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Original file line number Diff line number Diff line change
Expand Up @@ -311,7 +311,7 @@ static int AlphaBeta(Thread *thread, Stack *ss, int alpha, int beta, Depth depth
ss->staticEval = eval = CorrectEval(thread, eval);

// Use ttScore as eval if it is more informative
if (ttScore != NOSCORE && TTScoreIsMoreInformative(ttBound, ttScore, eval))
if (abs(ttScore) < TBWIN_IN_MAX && TTScoreIsMoreInformative(ttBound, ttScore, eval))
eval = ttScore;

// Improving if not in check, and current eval is higher than 2 plies ago
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