This reverts commit
36c82b751ce227c05bfb
Seems a regression against 2.3.1 tested with 20K games at 60"+0.05
With patch applied
ELO: 15.44 +-2.8 (95%) LOS: 100.0%
Total: 20000 W: 3928 L: 3040 D: 13032
Without patch applied
ELO: 18.76 +-2.8 (95%) LOS: 100.0%
Total: 20000 W: 3903 L: 2824 D: 13273
bench:
4781239
// but fixing this made program slightly weaker.
Depth predictedDepth = newDepth - reduction<PvNode>(depth, moveCount);
futilityValue = ss->staticEval + ss->evalMargin + futility_margin(predictedDepth, moveCount)
- + 2 * Gain[pos.piece_moved(move)][to_sq(move)];
+ + Gain[pos.piece_moved(move)][to_sq(move)];
if (futilityValue < beta)
{