fix quiescence check bug

src/search.rs

@@ -389,11 +389,12 @@ pub fn negamax(game: &mut Board, sc: &mut SearchControl, hash: &mut Cache, mut a
     if depth == 0 {
         // check extend
         if check {
-            depth = 1;
+            //depth = 1;
         }
         else {
-            return quiescence_search(game, sc, hash, alpha, beta, 9);
+            
         }
+        return quiescence_search(game, sc, hash, alpha, beta, 9);
     }
 
     sc.nodes += 1;
@@ -555,7 +556,7 @@ fn quiescence_search(board: &mut Board, sc: &mut SearchControl, hash: &mut Cache
         }
     }
 
-    let last_move = sc.last_move;
+    let _last_move = sc.last_move;
 
     if board.get_piece(KING, board.turn) == 0 { return checkmated(); }
 
@@ -563,13 +564,14 @@ fn quiescence_search(board: &mut Board, sc: &mut SearchControl, hash: &mut Cache
 
     let val = evaluate(board);
 
+    // TODO handle checks better
     if !check {
         if val >= beta {
             return beta;
         }
-        if val > alpha {
-            alpha = val;
-        }
+    }
+    if val > alpha {
+        alpha = val;
     }
 
     if depth <= 0 {