along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include "search.h"
+
#include <algorithm>
+#include <array>
+#include <atomic>
#include <cassert>
#include <cmath>
-#include <cstring> // For std::memset
+#include <cstdlib>
+#include <cstring>
+#include <initializer_list>
#include <iostream>
#include <sstream>
+#include <string>
+#include <utility>
+#include "bitboard.h"
#include "evaluate.h"
#include "misc.h"
#include "movegen.h"
#include "movepick.h"
+#include "nnue/evaluate_nnue.h"
+#include "nnue/nnue_common.h"
#include "position.h"
-#include "search.h"
+#include "syzygy/tbprobe.h"
#include "thread.h"
#include "timeman.h"
#include "tt.h"
#include "uci.h"
-#include "syzygy/tbprobe.h"
-#include "nnue/evaluate_nnue.h"
namespace Stockfish {
int Reductions[MAX_MOVES]; // [depth or moveNumber]
Depth reduction(bool i, Depth d, int mn, Value delta, Value rootDelta) {
- int r = Reductions[d] * Reductions[mn];
- return (r + 1372 - int(delta) * 1073 / int(rootDelta)) / 1024 + (!i && r > 936);
+ int reductionScale = Reductions[d] * Reductions[mn];
+ return (reductionScale + 1372 - int(delta) * 1073 / int(rootDelta)) / 1024
+ + (!i && reductionScale > 936);
}
constexpr int futility_move_count(bool improving, Depth depth) {
// Decrease further on cutNodes. (~1 Elo)
if ( ss->ttPv
&& !likelyFailLow)
- r -= cutNode && tte->depth() >= depth + 3 ? 3 : 2;
+ r -= cutNode && tte->depth() >= depth ? 3 : 2;
// Decrease reduction if opponent's move count is high (~1 Elo)
if ((ss-1)->moveCount > 8)
// Decrease reduction if ttMove has been singularly extended (~1 Elo)
if (singularQuietLMR)
r--;
-
+
// Increase reduction on repetition (~1 Elo)
if ( move == (ss-4)->currentMove
&& pos.has_repeated())