const Value EasyMoveMargin = Value(0x200);
// Last seconds noise filtering (LSN)
- const bool UseLSNFiltering = false;
+ const bool UseLSNFiltering = true;
const int LSNTime = 4000; // In milliseconds
const Value LSNValue = value_from_centipawns(200);
bool loseOnTime = false;
int SearchStartTime, MaxNodes, MaxDepth, MaxSearchTime;
int AbsoluteMaxSearchTime, ExtraSearchTime, ExactMaxTime;
bool UseTimeManagement, InfiniteSearch, PonderSearch, StopOnPonderhit;
- bool FirstRootMove, AbortSearch, Quit, AspirationFailLow;
+ bool FirstRootMove, AbortSearch, Quit, AspirationFailLow, ZugDetection;
// Log file
bool UseLogFile;
if (get_option_value_string("Book File") != OpeningBook.file_name())
OpeningBook.open(get_option_value_string("Book File"));
- Move bookMove = OpeningBook.get_move(pos);
+ Move bookMove = OpeningBook.get_move(pos, get_option_value_bool("Best Book Move"));
if (bookMove != MOVE_NONE)
{
if (PonderSearch)
MultiPV = get_option_value_int("MultiPV");
Chess960 = get_option_value_bool("UCI_Chess960");
UseLogFile = get_option_value_bool("Use Search Log");
+ ZugDetection = get_option_value_bool("Zugzwang detection"); // To be removed after 1.7.1
if (UseLogFile)
LogFile.open(get_option_value_string("Search Log Filename").c_str(), std::ios::out | std::ios::app);
{
assert(value_to_tt(nullValue, ply) == nullValue);
- // Special flag null values that are not zugzwang checked
- ValueType vt = (depth < 6 * OnePly ? VALUE_TYPE_NS_LO : VALUE_TYPE_LOWER);
- TT.store(posKey, nullValue, vt, depth, MOVE_NONE);
+ TT.store(posKey, nullValue, VALUE_TYPE_NS_LO, depth, MOVE_NONE);
return nullValue;
}
} else {
// Detect blocking evasions that are candidate to be pruned
evasionPrunable = isCheck
- && bestValue != -VALUE_INFINITE
+ && bestValue > value_mated_in(PLY_MAX)
&& !pos.move_is_capture(move)
&& pos.type_of_piece_on(move_from(move)) != KING
&& !pos.can_castle(pos.side_to_move());
Value v = value_from_tt(tte->value(), ply);
- return (allowNullmove || !(tte->type() & VALUE_TYPE_NULL))
+ return (allowNullmove || !(tte->type() & VALUE_TYPE_NULL) || !ZugDetection)
&& ( tte->depth() >= depth
|| v >= Max(value_mate_in(PLY_MAX), beta)
}
// Wait until the thread has finished launching and is gone to sleep
- while (threads[i].state != THREAD_SLEEPING);
+ while (threads[i].state != THREAD_SLEEPING) {}
}
}
SplitPoint* sp;
- for (sp = threads[threadID].splitPoint; sp && !sp->stopRequest; sp = sp->parent);
+ for (sp = threads[threadID].splitPoint; sp && !sp->stopRequest; sp = sp->parent) {}
return sp != NULL;
}