diff options
Diffstat (limited to 'src/grossmeister')
| -rw-r--r-- | src/grossmeister/search.rs | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/src/grossmeister/search.rs b/src/grossmeister/search.rs index 0ca5ef4..c195527 100644 --- a/src/grossmeister/search.rs +++ b/src/grossmeister/search.rs @@ -50,18 +50,20 @@ impl Grossmeister { if let Some(transposition) = self.transposition() { if transposition.depth >= depth_left { match transposition.node_type { - NodeType::PV | NodeType::Cut => { + NodeType::PV => { + return transposition.score.clamp(alpha, beta); + } + NodeType::Cut => { if transposition.score >= beta { - return beta - } - if transposition.score > alpha { - alpha = transposition.score + return beta; } + alpha = transposition.score.clamp(alpha, beta); } NodeType::All => { if transposition.score <= alpha { - return alpha + return alpha; } + beta = transposition.score.clamp(alpha, beta); } } } @@ -171,18 +173,20 @@ impl Grossmeister { if let Some(transposition) = self.transposition() { match transposition.node_type { - NodeType::PV | NodeType::Cut => { + NodeType::PV => { + return transposition.score.clamp(alpha, beta); + } + NodeType::Cut => { if transposition.score >= beta { - return beta - } - if transposition.score > alpha { - alpha = transposition.score + return beta; } + alpha = transposition.score.clamp(alpha, beta); } NodeType::All => { if transposition.score <= alpha { - return alpha + return alpha; } + beta = transposition.score.clamp(alpha, beta); } } } |