int Reductions[MAX_MOVES]; // [depth or moveNumber]
Depth reduction(bool i, Depth d, int mn) {
- int r = Reductions[d / ONE_PLY] * Reductions[mn] / 1024;
+ int r = Reductions[d / ONE_PLY] * Reductions[mn];
return ((r + 512) / 1024 + (!i && r > 1024)) * ONE_PLY;
}
void Search::init() {
for (int i = 1; i < MAX_MOVES; ++i)
- Reductions[i] = int(733.3 * std::log(i));
+ Reductions[i] = int(22.9 * std::log(i));
}
if ( !captureOrPromotion
&& !givesCheck
- && !pos.advanced_pawn_push(move))
+ && (!pos.advanced_pawn_push(move) || pos.non_pawn_material(~us) > BishopValueMg))
{
// Move count based pruning (~30 Elo)
if (moveCountPruning)
if (!pos.see_ge(move, Value(-29 * lmrDepth * lmrDepth)))
continue;
}
- else if (!pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
+ else if ((!givesCheck || !(pos.blockers_for_king(~us) & from_sq(move)))
+ && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
continue;
}