Insert TT entries at the end of quiescence

src/search/quiescence.rs

@@ -2,7 +2,11 @@ use anyhow::{bail, Result};
 
 use crate::{board::game::Game, evaluation::pesto::pesto};
 
-use super::{move_ordering::score_move, time::TimeInfo};
+use super::{
+    move_ordering::score_move,
+    time::TimeInfo,
+    transposition_table::{NodeType, TTEntry},
+};
 
 pub fn quiescence(
     game: &mut Game,
@@ -35,6 +39,7 @@ pub fn quiescence(
 
     let color = game.current_player();
     let mut best_score = stand_pat;
+    let mut best_move = entry.and_then(|entry| entry.mv);
     let mut moves = game.board.pseudo_moves_all_captures();
 
     moves.sort_unstable_by_key(|mv| {
@@ -66,6 +71,7 @@ pub fn quiescence(
 
         if score > alpha {
             alpha = score;
+            best_move = Some(mv);
         }
 
         if score >= beta {
@@ -73,5 +79,14 @@ pub fn quiescence(
         }
     }
 
+    let node_type = match best_score {
+        s if s >= beta => NodeType::LowerBound,
+        s if s <= alpha => NodeType::UpperBound,
+        _ => NodeType::Exact,
+    };
+
+    game.tt
+        .insert(TTEntry::new(game.hash, best_move, 0, best_score, node_type));
+
     Ok(best_score)
 }