&& !ss->skipNullMove
&& depth < 4 * ONE_PLY
&& !inCheck
- && eval - FutilityMargins[depth][0] >= beta
- && eval - futility_margin(depth, (ss-1)->futMc) >= beta
++ && eval - futility_margin(depth, (ss-1)->futilityMoveCount) >= beta
&& abs(beta) < VALUE_MATE_IN_MAX_PLY
&& pos.non_pawn_material(pos.side_to_move()))
- return eval - FutilityMargins[depth][0];
- return eval - futility_margin(depth, (ss-1)->futMc);
++ return eval - futility_margin(depth, (ss-1)->futilityMoveCount);
// Step 8. Null move search with verification search (is omitted in PV nodes)
if ( !PvNode
<< " currmovenumber " << moveCount + PVIdx << sync_endl;
}
++ ss->futilityMoveCount = 0;
ext = DEPTH_ZERO;
captureOrPromotion = pos.is_capture_or_promotion(move);
givesCheck = pos.move_gives_check(move, ci);
continue;
}
++
++ // We have not pruned the move that will be searched, but remember how
++ // far in the move list we are to be more aggressive in the child node.
++ ss->futilityMoveCount = moveCount;
}
// Check for legality only before to do the move