// Called at the beginning of search() when starting to examine a new node.
void SearchStack::init() {
- pv[0] = pv[1] = MOVE_NONE;
+ pv[0] = pv[1] = bestMove = MOVE_NONE;
currentMove = threatMove = MOVE_NONE;
reduction = Depth(0);
eval = VALUE_NONE;
search<PvNode>(pos, ss, alpha, beta, d, ply);
ss->skipNullMove = false;
- ttMove = ss->pv[0];
+ ttMove = ss->bestMove;
tte = TT.retrieve(posKey);
}
return bestValue;
ValueType f = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT);
- move = (bestValue <= oldAlpha ? MOVE_NONE : ss->pv[0]);
+ move = (bestValue <= oldAlpha ? MOVE_NONE : ss->bestMove);
TT.store(posKey, value_to_tt(bestValue, ply), f, depth, move, ss->eval, ei.kingDanger[pos.side_to_move()]);
// Update killers and history only for non capture moves that fails high
Value oldAlpha = alpha;
TM.incrementNodeCounter(pos.thread());
- ss->pv[0] = ss->pv[1] = ss->currentMove = MOVE_NONE;
+ ss->pv[0] = ss->pv[1] = ss->bestMove = ss->currentMove = MOVE_NONE;
ss->eval = VALUE_NONE;
// Check for an instant draw or maximum ply reached
// Update transposition table
Depth d = (depth == Depth(0) ? Depth(0) : Depth(-1));
ValueType f = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT);
- TT.store(pos.get_key(), value_to_tt(bestValue, ply), f, d, ss->pv[0], ss->eval, ei.kingDanger[pos.side_to_move()]);
+ TT.store(pos.get_key(), value_to_tt(bestValue, ply), f, d, ss->bestMove, ss->eval, ei.kingDanger[pos.side_to_move()]);
// Update killers only for checking moves that fails high
if ( bestValue >= beta
- && !pos.move_is_capture_or_promotion(ss->pv[0]))
- update_killers(ss->pv[0], ss);
+ && !pos.move_is_capture_or_promotion(ss->bestMove))
+ update_killers(ss->bestMove, ss);
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);
Move* src = (ss+1)->pv;
Move* dst = ss->pv;
- *dst = ss->currentMove;
+ *dst = ss->bestMove = ss->currentMove;
do
*++dst = *src;
Move* dst = ss->pv;
Move* pdst = pss->pv;
- *dst = *pdst = ss->currentMove;
+ *dst = *pdst = pss->bestMove = ss->bestMove = ss->currentMove;
do
*++dst = *++pdst = *src;