continue;
// Value based pruning
- if (depth < 6 * OnePly && approximateEval < beta)
+ if (depth < 7 * OnePly && approximateEval < beta)
{
if (futilityValue == VALUE_NONE)
futilityValue = evaluate(pos, ei, threadID)
- + (depth < 2 * OnePly ? FutilityMargin1
- : FutilityMargin2 + (depth - 2*OnePly) * 32);
+ + (depth < 2 * OnePly ? FutilityMargin1 :
+ + (depth < 6 * OnePly ? FutilityMargin2 + (depth - 2*OnePly) * 32
+ : FutilityMargin2 + (depth - 2*OnePly) * 64));
+
if (futilityValue < beta)
{
if (futilityValue > bestValue)