Value *alpha, Value *beta, Value *bestValue,
const Value futilityValue, const Value approximateValue,
Depth depth, int *moves,
- MovePicker *mp, Bitboard dcCandidates, int master, bool pvNode);
+ MovePicker *mp, int master, bool pvNode);
void wake_sleeping_threads();
#if !defined(_MSC_VER)
int perft(Position& pos, Depth depth)
{
Move move;
- MovePicker mp = MovePicker(pos, MOVE_NONE, depth, H);
- Bitboard dcCandidates = pos.discovered_check_candidates(pos.side_to_move());
int sum = 0;
+ MovePicker mp = MovePicker(pos, MOVE_NONE, depth, H);
// If we are at the last ply we don't need to do and undo
// the moves, just to count them.
if (depth <= OnePly) // Replace with '<' to test also qsearch
{
- while ((move = mp.get_next_move()) != MOVE_NONE) sum++;
+ while (mp.get_next_move()) sum++;
return sum;
}
// Loop through all legal moves
+ CheckInfo ci(pos);
while ((move = mp.get_next_move()) != MOVE_NONE)
{
- StateInfo st;
- pos.do_move(move, st, dcCandidates);
- sum += perft(pos, depth - OnePly);
- pos.undo_move(move);
+ StateInfo st;
+ pos.do_move(move, st, ci, pos.move_is_check(move, ci));
+ sum += perft(pos, depth - OnePly);
+ pos.undo_move(move);
}
return sum;
}
Value oldAlpha = alpha;
Value value;
- Bitboard dcCandidates = pos.discovered_check_candidates(pos.side_to_move());
+ CheckInfo ci(pos);
// Loop through all the moves in the root move list
for (int i = 0; i < rml.move_count() && !AbortSearch; i++)
<< " currmovenumber " << i + 1 << std::endl;
// Decide search depth for this move
+ bool moveIsCheck = pos.move_is_check(move);
bool captureOrPromotion = pos.move_is_capture_or_promotion(move);
bool dangerous;
- ext = extension(pos, move, true, captureOrPromotion, pos.move_is_check(move), false, false, &dangerous);
+ ext = extension(pos, move, true, captureOrPromotion, moveIsCheck, false, false, &dangerous);
newDepth = (Iteration - 2) * OnePly + ext + InitialDepth;
// Make the move, and search it
- pos.do_move(move, st, dcCandidates);
+ pos.do_move(move, st, ci, moveIsCheck);
if (i < MultiPV)
{
newDepth = depth - OnePly + ext;
// Make and search the move
- pos.do_move(move, st, ci.dcCandidates);
+ pos.do_move(move, st, ci, moveIsCheck);
if (moveCount == 1) // The first move in list is the PV
value = -search_pv(pos, ss, -beta, -alpha, newDepth, ply+1, threadID);
&& idle_thread_exists(threadID)
&& !AbortSearch
&& !thread_should_stop(threadID)
- && split(pos, ss, ply, &alpha, &beta, &bestValue, VALUE_NONE, VALUE_NONE, depth,
- &moveCount, &mp, ci.dcCandidates, threadID, true))
+ && split(pos, ss, ply, &alpha, &beta, &bestValue, VALUE_NONE, VALUE_NONE,
+ depth, &moveCount, &mp, threadID, true))
break;
}
// Futility pruning
if ( useFutilityPruning
&& !dangerous
- && !captureOrPromotion)
+ && !captureOrPromotion
+ && move != ttMove)
{
// History pruning. See ok_to_prune() definition
if ( moveCount >= 2 + int(depth)
}
// Make and search the move
- pos.do_move(move, st, ci.dcCandidates);
+ pos.do_move(move, st, ci, moveIsCheck);
// Try to reduce non-pv search depth by one ply if move seems not problematic,
// if the move fails high will be re-searched at full depth.
&& idle_thread_exists(threadID)
&& !AbortSearch
&& !thread_should_stop(threadID)
- && split(pos, ss, ply, &beta, &beta, &bestValue, futilityValue, approximateEval, depth, &moveCount,
- &mp, ci.dcCandidates, threadID, false))
+ && split(pos, ss, ply, &beta, &beta, &bestValue, futilityValue, approximateEval,
+ depth, &moveCount, &mp, threadID, false))
break;
}
StateInfo st;
Move ttMove, move;
Value staticValue, bestValue, value, futilityValue;
- bool isCheck, enoughMaterial;
+ bool isCheck, enoughMaterial, moveIsCheck;
const TTEntry* tte = NULL;
int moveCount = 0;
bool pvNode = (beta - alpha != 1);
moveCount++;
ss[ply].currentMove = move;
+ moveIsCheck = pos.move_is_check(move, ci);
+
// Futility pruning
if ( enoughMaterial
&& !isCheck
&& !pvNode
+ && !moveIsCheck
+ && move != ttMove
&& !move_is_promotion(move)
- && !pos.move_is_check(move, ci)
&& !pos.move_is_passed_pawn_push(move))
{
futilityValue = staticValue
continue;
// Make and search the move
- pos.do_move(move, st, ci.dcCandidates);
+ pos.do_move(move, st, ci, moveIsCheck);
value = -qsearch(pos, ss, -beta, -alpha, depth-OnePly, ply+1, threadID);
pos.undo_move(move);
// Make and search the move.
StateInfo st;
- pos.do_move(move, st, sp->dcCandidates);
+ pos.do_move(move, st, ci, moveIsCheck);
// Try to reduce non-pv search depth by one ply if move seems not problematic,
// if the move fails high will be re-searched at full depth.
// Make and search the move.
StateInfo st;
- pos.do_move(move, st, sp->dcCandidates);
+ pos.do_move(move, st, ci, moveIsCheck);
// Try to reduce non-pv search depth by one ply if move seems not problematic,
// if the move fails high will be re-searched at full depth.
bool split(const Position& p, SearchStack* sstck, int ply,
Value* alpha, Value* beta, Value* bestValue, const Value futilityValue,
const Value approximateEval, Depth depth, int* moves,
- MovePicker* mp, Bitboard dcCandidates, int master, bool pvNode) {
+ MovePicker* mp, int master, bool pvNode) {
assert(p.is_ok());
assert(sstck != NULL);
splitPoint->alpha = pvNode? *alpha : (*beta - 1);
splitPoint->beta = *beta;
splitPoint->pvNode = pvNode;
- splitPoint->dcCandidates = dcCandidates;
splitPoint->bestValue = *bestValue;
splitPoint->futilityValue = futilityValue;
splitPoint->approximateEval = approximateEval;