verify boardstate when collecting PV

znxftw · Dec 23, 2024 · 407d621 · 407d621
1 parent 6bc73e2
commit 407d621
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/Rudim/Common/TranspositionTable.cs b/Rudim/Common/TranspositionTable.cs
@@ -67,8 +67,14 @@ public static List<Move> CollectPrincipalVariation(BoardState boardState)
 
                 if (pv.Contains(entry.BestMove))
                     break;
-                pv.Add(entry.BestMove);
+
                 boardState.MakeMove(entry.BestMove);
+                if (boardState.IsInCheck(boardState.SideToMove.Other()))
+                {
+                    boardState.UnmakeMove(entry.BestMove);
+                    break;
+                }
+                pv.Add(entry.BestMove);
             }
 
             for (int i = pv.Count - 1; i >= 0; i--)