else
{
if ((ss-1)->currentMove != MOVE_NULL)
- {
- int bonus = -(ss-1)->statScore / 512;
-
- ss->staticEval = eval = evaluate(pos) + bonus;
- }
+ ss->staticEval = eval = evaluate(pos);
else
ss->staticEval = eval = -(ss-1)->staticEval + 2 * Tempo;
}
}
- // Step 11. Internal iterative deepening (~1 Elo)
- if (depth >= 7 && !ttMove)
- {
- search<NT>(pos, ss, alpha, beta, depth - 7, cutNode);
-
- tte = TT.probe(posKey, ttHit);
- ttValue = ttHit ? value_from_tt(tte->value(), ss->ply, pos.rule50_count()) : VALUE_NONE;
- ttMove = ttHit ? tte->move() : MOVE_NONE;
- }
+ // Step 11. If the position is not in TT, decrease depth by 2
+ if ( PvNode
+ && depth >= 6
+ && !ttMove)
+ depth -= 2;
moves_loop: // When in check, search starts from here
&& (pos.is_discovery_check_on_king(~us, move) || pos.see_ge(move)))
extension = 1;
- // Passed pawn extension
- else if ( move == ss->killers[0]
- && pos.advanced_pawn_push(move)
- && pos.pawn_passed(us, to_sq(move)))
- extension = 1;
-
// Last captures extension
else if ( PieceValue[EG][pos.captured_piece()] > PawnValueEg
&& pos.non_pawn_material() <= 2 * RookValueMg)