Null move prune at lower depth (#128)

* nmp at depth >= 2 * 3
TerjeKir · Jan 6, 2020 · bc37604 · bc37604
1 parent d365f75
commit bc37604
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/search.c b/src/search.c
@@ -318,7 +318,7 @@ static int AlphaBeta(int alpha, int beta, int depth, Position *pos, SearchInfo *
             return eval;
 
         // Null Move Pruning
-        if (doNull && eval >= beta && (pos->bigPieces[pos->side] > 0) && depth >= 4) {
+        if (doNull && eval >= beta && (pos->bigPieces[pos->side] > 0) && depth >= 3) {
 
             int R = 3 + depth / 4;