// Depth limit for selective search:
Depth SelectiveDepth = 7*OnePly;
+ // Use dynamic LMR?
+ const bool UseDynamicLMR = false;
+
// Use internal iterative deepening?
const bool UseIIDAtPVNodes = true;
const bool UseIIDAtNonPVNodes = false;
&& !move_is_killer(move, ss[ply]))
{
// LMR dynamic reduction
- Depth R = (moveCount >= 2 * LMRNonPVMoves && depth > 7*OnePly ? 2*OnePly : OnePly);
+ Depth R = UseDynamicLMR
+ && moveCount >= 2 * LMRNonPVMoves
+ && depth > 7*OnePly ? 2*OnePly : OnePly;
ss[ply].reduction = R;
value = -search(pos, ss, -(beta-1), newDepth-R, ply+1, true, threadID);
Value bestValue = staticValue;
if (bestValue >= beta)
+ {
+ // Update transposition table before to leave
+ TT.store(pos, value_to_tt(bestValue, ply), depth, MOVE_NONE, VALUE_TYPE_EXACT);
return bestValue;
+ }
if (bestValue > alpha)
alpha = bestValue;
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);
- // Update transposition table
- TT.store(pos, value_to_tt(bestValue, ply), depth, MOVE_NONE, VALUE_TYPE_EXACT);
-
// Update killers only for good check moves
Move m = ss[ply].currentMove;
if (alpha >= beta && ok_to_history(pos, m)) // Only non capture moves are considered