Add TT lookups in quiescence, move TT inside Game, remove redundant occupancy and time limit functions

src/search/iterative_deepening.rs

@@ -6,21 +6,19 @@ use crate::{
 
 use super::{
     negamax,
-    time::{time_limit_reached, TimeInfo},
-    transposition_table::TranspositionTable,
+    time::{soft_limit, TimeInfo},
 };
 
 pub fn iterative_deepening(
     game: &mut Game,
     max_depth: u8,
     remaining_time: u128,
-    tt: &mut TranspositionTable,
 ) -> anyhow::Result<Option<Move>> {
     let (mut best_move, mut best_score) = (None, MIN_SCORE);
     let time = std::time::Instant::now();
 
     for depth in 1..=max_depth {
-        if time_limit_reached(&time, remaining_time, best_score) {
+        if soft_limit(&time, remaining_time, best_score) {
             return Ok(best_move);
         }
 
@@ -31,7 +29,6 @@ pub fn iterative_deepening(
             depth,
             0,
             &TimeInfo::new(time, remaining_time),
-            tt,
         );
 
         if let Ok(search_result) = search_result {
@@ -44,6 +41,12 @@ pub fn iterative_deepening(
         }
     }
 
+    // tt.lookup(game.hash).map(|entry| {
+    //     if entry.mv.is_some() {
+    //         best_move = entry.mv;
+    //     }
+    // });
+
     Ok(best_move)
 }
 
@@ -52,10 +55,7 @@ mod tests {
     use crate::{
         board::fen::from_fen,
         movegen::attack_generator::init_attacks,
-        search::{
-            iterative_deepening, transposition_table::TranspositionTable, MAX_DEPTH, MAX_TT_SIZE,
-            REMAINING_TIME_DEFAULT,
-        },
+        search::{iterative_deepening, MAX_DEPTH, REMAINING_TIME_DEFAULT},
     };
 
     const FEN: &str = "1r2k2r/2P1pq1p/2npb3/1p3ppP/p3P3/P2B1Q2/1P1PNPP1/R3K2R w KQk g6 0 1";
@@ -64,15 +64,9 @@ mod tests {
     fn test_iterative_deepening() -> anyhow::Result<()> {
         init_attacks();
         let mut game = from_fen(FEN).unwrap();
-        let mut tt = TranspositionTable::new(MAX_TT_SIZE);
         let time_now = std::time::Instant::now();
 
-        iterative_deepening::iterative_deepening(
-            &mut game,
-            MAX_DEPTH,
-            REMAINING_TIME_DEFAULT,
-            &mut tt,
-        )?;
+        iterative_deepening::iterative_deepening(&mut game, MAX_DEPTH, REMAINING_TIME_DEFAULT)?;
 
         dbg!(time_now.elapsed());