sync_cout << "info depth 0 score "
<< UCI::format_value(RootPos.checkers() ? -VALUE_MATE : VALUE_DRAW)
<< sync_endl;
-
- goto finalize;
}
+ else
+ {
+ for (size_t i = 0; i < Threads.size(); ++i)
+ Threads[i]->maxPly = 0;
- // Reset the threads, still sleeping: will wake up at split time
- for (size_t i = 0; i < Threads.size(); ++i)
- Threads[i]->maxPly = 0;
-
- Threads.timer->run = true;
- Threads.timer->notify_one(); // Wake up the recurring timer
-
- id_loop(RootPos); // Let's start searching !
-
- Threads.timer->run = false; // Stop the timer
+ Threads.timer->run = true;
+ Threads.timer->notify_one(); // Wake up the recurring timer
-finalize:
+ id_loop(RootPos); // Let's start searching !
- // When search is stopped this info is not printed
- sync_cout << "info nodes " << RootPos.nodes_searched()
- << " time " << Time::now() - SearchTime + 1 << sync_endl;
+ Threads.timer->run = false;
+ }
// When we reach the maximum depth, we can arrive here without a raise of
// Signals.stop. However, if we are pondering or in an infinite search,
RootPos.this_thread()->wait_for(Signals.stop);
}
- // Best move could be MOVE_NONE when searching on a stalemate position
sync_cout << "bestmove " << UCI::format_move(RootMoves[0].pv[0], RootPos.is_chess960())
<< " ponder " << UCI::format_move(RootMoves[0].pv[1], RootPos.is_chess960())
<< sync_endl;
multiPV = std::max(multiPV, skill.candidates_size());
// Iterative deepening loop until requested to stop or target depth reached
- while (++depth < MAX_PLY && !Signals.stop && (!Limits.depth || depth <= Limits.depth))
+ while (++depth < DEPTH_MAX && !Signals.stop && (!Limits.depth || depth <= Limits.depth))
{
// Age out PV variability metric
BestMoveChanges *= 0.5;
// Sort the PV lines searched so far and update the GUI
std::stable_sort(RootMoves.begin(), RootMoves.begin() + PVIdx + 1);
- if ( !Signals.stop
- && ( PVIdx + 1 == std::min(multiPV, RootMoves.size())
- || Time::now() - SearchTime > 3000))
+ if (Signals.stop)
+ sync_cout << "info nodes " << RootPos.nodes_searched()
+ << " time " << Time::now() - SearchTime << sync_endl;
+
+ else if ( PVIdx + 1 == std::min(multiPV, RootMoves.size())
+ || Time::now() - SearchTime > 3000)
sync_cout << uci_pv(pos, depth, alpha, beta) << sync_endl;
}
assert(PvNode || (alpha == beta - 1));
assert(depth > DEPTH_ZERO);
+ PVEntry pv;
Move quietsSearched[64];
StateInfo st;
const TTEntry *tte;
// a fail high/low. The biggest advantage to probing at PV nodes is to have a
// smooth experience in analysis mode. We don't probe at Root nodes otherwise
// we should also update RootMoveList to avoid bogus output.
- if ( !RootNode
+ if ( !PvNode
&& tte
&& tte->depth() >= depth
&& ttValue != VALUE_NONE // Only in case of TT access race
- && ( PvNode ? tte->bound() == BOUND_EXACT
- : ttValue >= beta ? (tte->bound() & BOUND_LOWER)
- : (tte->bound() & BOUND_UPPER)))
+ && (ttValue >= beta ? (tte->bound() & BOUND_LOWER)
+ : (tte->bound() & BOUND_UPPER)))
{
ss->currentMove = ttMove; // Can be MOVE_NONE
<< " currmovenumber " << moveCount + PVIdx << sync_endl;
}
+ if (PvNode)
+ (ss+1)->pv = NULL;
+
ext = DEPTH_ZERO;
captureOrPromotion = pos.capture_or_promotion(move);
// For PV nodes only, do a full PV search on the first move or after a fail
// high (in the latter case search only if value < beta), otherwise let the
// parent node fail low with value <= alpha and to try another move.
- if (PvNode && (moveCount == 1 || (value > alpha && (RootNode || value < beta))))
+ if (PvNode && (moveCount == 1 || (value > alpha && (RootNode || value < beta)))) {
+ pv.pv[0] = MOVE_NONE;
+ (ss+1)->pv = &pv;
value = newDepth < ONE_PLY ?
givesCheck ? -qsearch<PV, true>(pos, ss+1, -beta, -alpha, DEPTH_ZERO)
: -qsearch<PV, false>(pos, ss+1, -beta, -alpha, DEPTH_ZERO)
: - search<PV, false>(pos, ss+1, -beta, -alpha, newDepth, false);
+ }
// Step 17. Undo move
pos.undo_move(move);
if (moveCount == 1 || value > alpha)
{
rm.score = value;
- rm.extract_pv_from_tt(pos);
+ rm.pv.resize(1);
+ for (int i = 0; (ss+1)->pv && i < MAX_PLY && (ss+1)->pv->pv[i] != MOVE_NONE; ++i)
+ rm.pv.push_back((ss+1)->pv->pv[i]);
// We record how often the best move has been changed in each
// iteration. This information is used for time management: When
{
bestMove = SpNode ? splitPoint->bestMove = move : move;
+ if (NT == PV) {
+ ss->pv->update(move, (ss+1)->pv);
+ if (SpNode)
+ splitPoint->ss->pv->update(move, (ss+1)->pv);
+ }
+
if (PvNode && value < beta) // Update alpha! Always alpha < beta
alpha = SpNode ? splitPoint->alpha = value : value;
else
assert(PvNode || (alpha == beta - 1));
assert(depth <= DEPTH_ZERO);
+ PVEntry pv;
StateInfo st;
const TTEntry* tte;
Key posKey;
bool givesCheck, evasionPrunable;
Depth ttDepth;
- // To flag BOUND_EXACT a node with eval above alpha and no available moves
- if (PvNode)
+ if (PvNode) {
+ // To flag BOUND_EXACT a node with eval above alpha and no available moves
oldAlpha = alpha;
+ (ss+1)->pv = &pv;
+ ss->pv->pv[0] = MOVE_NONE;
+ }
+
ss->currentMove = bestMove = MOVE_NONE;
ss->ply = (ss-1)->ply + 1;
ttMove = tte ? tte->move() : MOVE_NONE;
ttValue = tte ? value_from_tt(tte->value(),ss->ply) : VALUE_NONE;
- if ( tte
+ if ( !PvNode
+ && tte
&& tte->depth() >= ttDepth
&& ttValue != VALUE_NONE // Only in case of TT access race
- && ( PvNode ? tte->bound() == BOUND_EXACT
- : ttValue >= beta ? (tte->bound() & BOUND_LOWER)
- : (tte->bound() & BOUND_UPPER)))
+ && (ttValue >= beta ? (tte->bound() & BOUND_LOWER)
+ : (tte->bound() & BOUND_UPPER)))
{
ss->currentMove = ttMove; // Can be MOVE_NONE
return ttValue;
if (value > alpha)
{
+ if (PvNode)
+ ss->pv->update(move, &pv);
+
if (PvNode && value < beta) // Update alpha here! Always alpha < beta
{
alpha = value;
<< " time " << elapsed
<< " pv";
- for (size_t j = 0; RootMoves[i].pv[j] != MOVE_NONE; ++j)
+ for (size_t j = 0; j < RootMoves[i].pv.size(); ++j)
ss << " " << UCI::format_move(RootMoves[i].pv[j], pos.is_chess960());
}
} // namespace
-/// RootMove::extract_pv_from_tt() builds a PV by adding moves from the TT table.
-/// We also consider both failing high nodes and BOUND_EXACT nodes here to
-/// ensure that we have a ponder move even when we fail high at root. This
-/// results in a long PV to print that is important for position analysis.
-
-void RootMove::extract_pv_from_tt(Position& pos) {
-
- StateInfo state[MAX_PLY], *st = state;
- const TTEntry* tte;
- int ply = 1; // At root ply is 1...
- Move m = pv[0]; // ...instead pv[] array starts from 0
- Value expectedScore = score;
-
- pv.clear();
-
- do {
- pv.push_back(m);
-
- assert(MoveList<LEGAL>(pos).contains(pv[ply - 1]));
-
- pos.do_move(pv[ply++ - 1], *st++);
- tte = TT.probe(pos.key());
- expectedScore = -expectedScore;
-
- } while ( tte
- && expectedScore == value_from_tt(tte->value(), ply)
- && pos.pseudo_legal(m = tte->move()) // Local copy, TT could change
- && pos.legal(m, pos.pinned_pieces(pos.side_to_move()))
- && ply < MAX_PLY
- && (!pos.is_draw() || ply <= 2));
-
- pv.push_back(MOVE_NONE); // Must be zero-terminating
-
- while (--ply) pos.undo_move(pv[ply - 1]);
-}
-
-
/// RootMove::insert_pv_in_tt() is called at the end of a search iteration, and
/// inserts the PV back into the TT. This makes sure the old PV moves are searched
/// first, even if the old TT entries have been overwritten.
StateInfo state[MAX_PLY], *st = state;
const TTEntry* tte;
- int idx = 0; // Ply starts from 1, we need to start from 0
+ int idx = 0;
- do {
+ for (; idx < int(pv.size()); ++idx) {
tte = TT.probe(pos.key());
if (!tte || tte->move() != pv[idx]) // Don't overwrite correct entries
TT.store(pos.key(), VALUE_NONE, BOUND_NONE, DEPTH_NONE, pv[idx], VALUE_NONE);
assert(MoveList<LEGAL>(pos).contains(pv[idx]));
-
- pos.do_move(pv[idx++], *st++);
-
- } while (pv[idx] != MOVE_NONE);
+ pos.do_move(pv[idx], *st++);
+ }
while (idx) pos.undo_move(pv[--idx]);
}
projects / stockfish / blobdiff