feat!: remove transposition table from quiescence

1 files changed, 0 insertions, 42 deletions

diff --git a/src/grossmeister/search.rs b/src/grossmeister/search.rs
index a5696d6..eafb8a7 100644
--- a/src/grossmeister/search.rs
+++ b/src/grossmeister/search.rs
@@ -171,38 +171,9 @@ impl Grossmeister {
             return 0.0
         }
 
-        if let Some(transposition) = self.transposition() {
-            match transposition.node_type {
-                NodeType::PV => {
-                    return transposition.score.clamp(alpha, beta);
-                }
-                NodeType::Cut => {
-                    if transposition.score >= beta {
-                        return beta;
-                    }
-                    alpha = transposition.score.clamp(alpha, beta);
-                }
-                NodeType::All => {
-                    if transposition.score <= alpha {
-                        return alpha;
-                    }
-                    beta = transposition.score.clamp(alpha, beta);
-                }
-            }
-        }
-
-        let mut transposition = TranspositionTableItem {
-            hash: self.board.hash,
-            depth: 0,
-            mov: None,
-            score: alpha,
-            node_type: NodeType::All,
-        };
-
         // Mate distance pruning
         let mating_score = Grossmeister::MDP(&mut alpha, &mut beta, root_distance);
         if mating_score != 0.0 {
-            transposition.score = mating_score;
             return mating_score
         }
 
@@ -237,22 +208,10 @@ impl Grossmeister {
                 self.board.unmake_move(mov, captured_piece, ep_target_before, castling_rights_before, hash_before);
 
                 if evaluation >= beta {
-                    transposition.mov = Some(mov);
-                    transposition.score = beta;
-                    transposition.node_type = NodeType::Cut;
-                    self.store_transposition(transposition);
-
                     return beta; // Fail-hard beta-cutoff
                 }
                 if evaluation > alpha {
-                    transposition.mov = Some(mov);
-                    transposition.score = evaluation;
-                    transposition.node_type = NodeType::Cut;
                     alpha = evaluation;
-                } else if transposition.node_type == NodeType::All {
-                    transposition.mov = None;
-                    transposition.score = alpha;
-                    transposition.node_type = NodeType::All;
                 }
             } else {
                 self.board.unmake_move(mov, captured_piece, ep_target_before, castling_rights_before, hash_before);
@@ -263,7 +222,6 @@ impl Grossmeister {
             return -SCORE_MATE + root_distance as Score
         }
 
-        self.store_transposition(transposition);
         alpha
     }