diff options
Diffstat (limited to 'src/board')
| -rw-r--r-- | src/board/engine.rs | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/src/board/engine.rs b/src/board/engine.rs index d550418..b6daacf 100644 --- a/src/board/engine.rs +++ b/src/board/engine.rs @@ -135,7 +135,7 @@ impl Board { match self.transposition_table[(self.hash % TTABLE_SIZE) as usize] { Some(item) => { - if item.node_type == NodeType::PV { + if item.node_type == NodeType::PV && item.hash == self.hash { moves.insert(0, item.best_move); } } @@ -158,13 +158,6 @@ impl Board { self.unmake_move(mov, captured_piece, ep_target_before, castling_rights_before, hash_before); if score >= beta { - self.transposition_table[(self.hash % TTABLE_SIZE) as usize] = Some(TranspositionTableItem { - hash: self.hash, - best_move: mov, - depth: depth_left, // TODO: should be actual depth searched - node_type: NodeType::Cut, - score, - }); return (beta, principal_variation); } if score > alpha { @@ -172,6 +165,14 @@ impl Board { principal_variation = Vec::with_capacity(depth_left as usize); principal_variation.push(mov); principal_variation.append(&mut subtree_pv); + + self.transposition_table[(self.hash % TTABLE_SIZE) as usize] = Some(TranspositionTableItem { + hash: self.hash, + best_move: mov, + depth: depth_left, // TODO: should be actual depth searched + node_type: NodeType::PV, + score, + }); } } else { self.unmake_move(mov, captured_piece, ep_target_before, castling_rights_before, hash_before); @@ -198,7 +199,7 @@ impl Board { match self.transposition_table[(self.hash % TTABLE_SIZE) as usize] { Some(item) => { - if item.node_type == NodeType::PV { + if item.node_type == NodeType::PV && item.hash == self.hash { moves.insert(0, item.best_move); } } |