Key posKey;
Move ttMove, move, excludedMove, bestMove, threatMove;
Depth ext, newDepth;
Key posKey;
Move ttMove, move, excludedMove, bestMove, threatMove;
Depth ext, newDepth;
Value bestValue, value, oldAlpha, ttValue;
Value refinedValue, nullValue, futilityValue;
bool pvMove, inCheck, singularExtensionNode, givesCheck;
bool captureOrPromotion, dangerous, doFullDepthSearch;
int moveCount, playedMoveCount;
Value bestValue, value, oldAlpha, ttValue;
Value refinedValue, nullValue, futilityValue;
bool pvMove, inCheck, singularExtensionNode, givesCheck;
bool captureOrPromotion, dangerous, doFullDepthSearch;
int moveCount, playedMoveCount;
Thread* thisThread = pos.this_thread();
moveCount = playedMoveCount = 0;
oldAlpha = alpha;
inCheck = pos.in_check();
Thread* thisThread = pos.this_thread();
moveCount = playedMoveCount = 0;
oldAlpha = alpha;
inCheck = pos.in_check();
- else
- {
- bestValue = -VALUE_INFINITE;
- ss->currentMove = threatMove = (ss+1)->excludedMove = bestMove = MOVE_NONE;
- (ss+1)->skipNullMove = false; (ss+1)->reduction = DEPTH_ZERO;
- (ss+2)->killers[0] = (ss+2)->killers[1] = MOVE_NONE;
- }
+
+ bestValue = -VALUE_INFINITE;
+ ss->currentMove = threatMove = (ss+1)->excludedMove = bestMove = MOVE_NONE;
+ ss->ply = (ss-1)->ply + 1;
+ (ss+1)->skipNullMove = false; (ss+1)->reduction = DEPTH_ZERO;
+ (ss+2)->killers[0] = (ss+2)->killers[1] = MOVE_NONE;
+
+ // Used to send selDepth info to GUI
+ if (PvNode && thisThread->maxPly < ss->ply)
+ thisThread->maxPly = ss->ply;
// is not a problem when sorting becuase sort is stable and move
// position in the list is preserved, just the PV is pushed up.
rm.score = -VALUE_INFINITE;
// is not a problem when sorting becuase sort is stable and move
// position in the list is preserved, just the PV is pushed up.
rm.score = -VALUE_INFINITE;
&& !Signals.stop
&& !thisThread->cutoff_occurred())
bestValue = Threads.split<FakeSplit>(pos, ss, alpha, beta, bestValue, &bestMove,
&& !Signals.stop
&& !thisThread->cutoff_occurred())
bestValue = Threads.split<FakeSplit>(pos, ss, alpha, beta, bestValue, &bestMove,
- depth, threatMove, moveCount, &mp, NT);
+ depth, threatMove, moveCount, mp, NT);
// case of Signals.stop or thread.cutoff_occurred() are set, but this is
// harmless because return value is discarded anyhow in the parent nodes.
// If we are in a singular extension search then return a fail low score.
// case of Signals.stop or thread.cutoff_occurred() are set, but this is
// harmless because return value is discarded anyhow in the parent nodes.
// If we are in a singular extension search then return a fail low score.
- if (!moveCount)
- return excludedMove ? oldAlpha : inCheck ? mated_in(ss->ply) : VALUE_DRAW;
+ // A split node has at least one move, the one tried before to be splitted.
+ if (!SpNode && !moveCount)
+ return excludedMove ? alpha : inCheck ? mated_in(ss->ply) : VALUE_DRAW;
// If we have pruned all the moves without searching return a fail-low score
if (bestValue == -VALUE_INFINITE)
{
assert(!playedMoveCount);
// If we have pruned all the moves without searching return a fail-low score
if (bestValue == -VALUE_INFINITE)
{
assert(!playedMoveCount);
}
// Step 21. Update tables
// Update transposition table entry, killers and history
if (!SpNode && !Signals.stop && !thisThread->cutoff_occurred())
{
}
// Step 21. Update tables
// Update transposition table entry, killers and history
if (!SpNode && !Signals.stop && !thisThread->cutoff_occurred())
{
- move = bestValue <= oldAlpha ? MOVE_NONE : bestMove;
- bt = bestValue <= oldAlpha ? BOUND_UPPER
- : bestValue >= beta ? BOUND_LOWER : BOUND_EXACT;
+ Move ttm = bestValue <= oldAlpha ? MOVE_NONE : bestMove;
+ Bound bt = bestValue <= oldAlpha ? BOUND_UPPER
+ : bestValue >= beta ? BOUND_LOWER : BOUND_EXACT;
- TT.store(posKey, value_to_tt(bestValue, ss->ply), bt, depth, move, ss->eval, ss->evalMargin);
+ TT.store(posKey, value_to_tt(bestValue, ss->ply), bt, depth, ttm, ss->eval, ss->evalMargin);
// Decrease history of all the other played non-capture moves
for (int i = 0; i < playedMoveCount - 1; i++)
// Decrease history of all the other played non-capture moves
for (int i = 0; i < playedMoveCount - 1; i++)