Add depth based logging

src/search/negamax.rs

@@ -19,6 +19,7 @@ pub fn negamax(
     depth: u8,
     plies: u8,
     time_info: &TimeInfo,
+    total_nodes_searched: &mut u64,
 ) -> Result<i32> {
     if hard_limit(&time_info.time, time_info.remaining_time_in_ms) {
         bail!("Time is up! In Negamax");
@@ -29,7 +30,8 @@ pub fn negamax(
     }
 
     if depth == 0 {
-        let q_score = quiescence(game, alpha, beta, time_info).map_err(|e| anyhow!("{e}"))?;
+        let q_score = quiescence(game, alpha, beta, time_info, total_nodes_searched)
+            .map_err(|e| anyhow!("{e}"))?;
         return Ok(q_score);
     }
 
@@ -49,15 +51,39 @@ pub fn negamax(
             game.unmake_move();
             continue;
         }
-
         legal_moves += 1;
+        *total_nodes_searched += 1;
 
         let score = if legal_moves == 1 {
-            -negamax(game, -beta, -alpha, depth - 1, plies + 1, time_info)?
+            -negamax(
+                game,
+                -beta,
+                -alpha,
+                depth - 1,
+                plies + 1,
+                time_info,
+                total_nodes_searched,
+            )?
         } else {
-            let mut score = -negamax(game, -alpha - 1, -alpha, depth - 1, plies + 1, time_info)?;
+            let mut score = -negamax(
+                game,
+                -alpha - 1,
+                -alpha,
+                depth - 1,
+                plies + 1,
+                time_info,
+                total_nodes_searched,
+            )?;
             if score > alpha && score < beta {
-                score = -negamax(game, -beta, -alpha, depth - 1, plies + 1, time_info)?;
+                score = -negamax(
+                    game,
+                    -beta,
+                    -alpha,
+                    depth - 1,
+                    plies + 1,
+                    time_info,
+                    total_nodes_searched,
+                )?;
             }
             score
         };
@@ -110,7 +136,7 @@ mod tests {
 
         let e3f2 = Move::new(Square::E3, Square::F2);
         let time_info = TimeInfo::new(std::time::Instant::now(), 1000);
-        negamax(&mut game, MIN_SCORE, MAX_SCORE, 2, 0, &time_info)
+        negamax(&mut game, MIN_SCORE, MAX_SCORE, 2, 0, &time_info, &mut 0)
             .expect("Expected a search result");
 
         assert_eq!(e3f2, game.tt.lookup(game.hash).unwrap().mv.unwrap());
@@ -118,7 +144,7 @@ mod tests {
         let mut game = from_fen(FEN_MATE_IN_1[1]).unwrap();
 
         let e3f2 = Move::new(Square::E3, Square::F2);
-        negamax(&mut game, MIN_SCORE, MAX_SCORE, 2, 0, &time_info)
+        negamax(&mut game, MIN_SCORE, MAX_SCORE, 2, 0, &time_info, &mut 0)
             .expect("Expected a search result");
 
         assert_eq!(e3f2, game.tt.lookup(game.hash).unwrap().mv.unwrap());