&& history < -3000 * depth + 3000)
continue;
+ history += thisThread->mainHistory[us][from_to(move)];
+
// Futility pruning: parent node (~5 Elo)
if ( !ss->inCheck
&& lmrDepth < 8
- && ss->staticEval + 172 + 145 * lmrDepth + history / 256 <= alpha)
+ && ss->staticEval + 172 + 145 * lmrDepth + history / 128 <= alpha)
continue;
// Prune moves with negative SEE (~20 Elo)