}
else if (ttHit)
{
- // Never assume anything on values stored in TT
+ // Never assume anything about values stored in TT
ss->staticEval = eval = tte->eval();
if (eval == VALUE_NONE)
ss->staticEval = eval = evaluate(pos);
// Check extension (~2 Elo)
else if ( givesCheck
- && (pos.blockers_for_king(~us) & from_sq(move) || pos.see_ge(move)))
+ && (pos.is_discovery_check_on_king(~us, move) || pos.see_ge(move)))
extension = ONE_PLY;
// Castling extension
&& !givesCheck
&& (!pos.advanced_pawn_push(move) || pos.non_pawn_material(~us) > BishopValueMg))
{
- // Move count based pruning (~30 Elo)
+ // Move count based pruning
if (moveCountPruning)
continue;
if (!pos.see_ge(move, Value(-29 * lmrDepth * lmrDepth)))
continue;
}
- else if ((!givesCheck || !extension)
- && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
+ else if ( (!givesCheck || !extension)
+ && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
continue;
}
Depth r = reduction(improving, depth, moveCount);
// Reduction if other threads are searching this position.
- if (th.marked())
+ if (th.marked())
r += ONE_PLY;
// Decrease reduction if position is or has been on the PV
r += ONE_PLY;
// Decrease/increase reduction for moves with a good/bad history (~30 Elo)
- r -= ss->statScore / 20000 * ONE_PLY;
+ r -= ss->statScore / 16384 * ONE_PLY;
}
Depth d = clamp(newDepth - r, ONE_PLY, newDepth);
{
if (ttHit)
{
- // Never assume anything on values stored in TT
+ // Never assume anything about values stored in TT
if ((ss->staticEval = bestValue = tte->eval()) == VALUE_NONE)
ss->staticEval = bestValue = evaluate(pos);