tuned TM values

bench 1379150
official-stockfish · Jan 13, 2025 · fc76759 · fc76759
1 parent c085670
commit fc76759
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Showing 2 changed files with 29 additions and 24 deletions.
diff --git a/src/search.cpp b/src/search.cpp
@@ -441,17 +441,19 @@ void Search::Worker::iterative_deepening() {
         // Do we have time for the next iteration? Can we stop searching now?
         if (limits.use_time_management() && !threads.stop && !mainThread->stopOnPonderhit)
         {
-            int nodesEffort = rootMoves[0].effort * 100 / std::max(size_t(1), size_t(nodes));
+            int nodesEffort = rootMoves[0].effort * 100000 / std::max(size_t(1), size_t(nodes));
 
-            double fallingEval = (11 + 2 * (mainThread->bestPreviousAverageScore - bestValue)
-                                  + (mainThread->iterValue[iterIdx] - bestValue))
-                               / 100.0;
-            fallingEval = std::clamp(fallingEval, 0.580, 1.667);
+            double fallingEval =
+              (11.396 + 2.035 * (mainThread->bestPreviousAverageScore - bestValue)
+               + 0.968 * (mainThread->iterValue[iterIdx] - bestValue))
+              / 100.0;
+            fallingEval = std::clamp(fallingEval, 0.5786, 1.6752);
 
             // If the bestMove is stable over several iterations, reduce time accordingly
-            timeReduction    = lastBestMoveDepth + 8 < completedDepth ? 1.495 : 0.687;
-            double reduction = (1.48 + mainThread->previousTimeReduction) / (2.17 * timeReduction);
-            double bestMoveInstability = 1 + 1.88 * totBestMoveChanges / threads.size();
+            timeReduction = lastBestMoveDepth + 8 < completedDepth ? 1.4857 : 0.7046;
+            double reduction =
+              (1.4540 + mainThread->previousTimeReduction) / (2.1593 * timeReduction);
+            double bestMoveInstability = 0.9929 + 1.8519 * totBestMoveChanges / threads.size();
 
             double totalTime =
               mainThread->tm.optimum() * fallingEval * reduction * bestMoveInstability;
@@ -462,7 +464,7 @@ void Search::Worker::iterative_deepening() {
 
             auto elapsedTime = elapsed();
 
-            if (completedDepth >= 10 && nodesEffort >= 97 && elapsedTime > totalTime * 0.739
+            if (completedDepth >= 10 && nodesEffort >= 97056 && elapsedTime > totalTime * 0.6540
                 && !mainThread->ponder)
                 threads.stop = true;
 
@@ -477,7 +479,7 @@ void Search::Worker::iterative_deepening() {
                     threads.stop = true;
             }
             else
-                threads.increaseDepth = mainThread->ponder || elapsedTime <= totalTime * 0.506;
+                threads.increaseDepth = mainThread->ponder || elapsedTime <= totalTime * 0.5138;
         }
 
         mainThread->iterValue[iterIdx] = bestValue;

diff --git a/src/timeman.cpp b/src/timeman.cpp
@@ -88,17 +88,19 @@ void TimeManagement::init(Search::LimitsType& limits,
     const TimePoint scaledInc   = limits.inc[us] / scaleFactor;
 
     // Maximum move horizon of 50 moves
-    int mtg = limits.movestogo ? std::min(limits.movestogo, 50) : 50;
+    int centiMTG = limits.movestogo ? std::min(limits.movestogo * 100, 5000) : 5051;
 
     // If less than one second, gradually reduce mtg
-    if (scaledTime < 1000 && double(mtg) / scaledInc > 0.05)
+    if (scaledTime < 1000 && double(centiMTG) / scaledInc > 5.051)
     {
-        mtg = scaledTime * 0.05;
+        centiMTG = scaledTime * 5.051;
     }
 
     // Make sure timeLeft is > 0 since we may use it as a divisor
-    TimePoint timeLeft = std::max(TimePoint(1), limits.time[us] + limits.inc[us] * (mtg - 1)
-                                                  - moveOverhead * (2 + mtg));
+    TimePoint timeLeft =
+      std::max(TimePoint(1),
+               limits.time[us]
+                 + (limits.inc[us] * (centiMTG - 100) - moveOverhead * (200 + centiMTG)) / 100);
 
     // x basetime (+ z increment)
     // If there is a healthy increment, timeLeft can exceed the actual available
@@ -107,31 +109,32 @@ void TimeManagement::init(Search::LimitsType& limits,
     {
         // Extra time according to timeLeft
         if (originalTimeAdjust < 0)
-            originalTimeAdjust = 0.3285 * std::log10(timeLeft) - 0.4830;
+            originalTimeAdjust = 0.3128 * std::log10(timeLeft) - 0.4354;
 
         // Calculate time constants based on current time left.
         double logTimeInSec = std::log10(scaledTime / 1000.0);
-        double optConstant  = std::min(0.00308 + 0.000319 * logTimeInSec, 0.00506);
-        double maxConstant  = std::max(3.39 + 3.01 * logTimeInSec, 2.93);
+        double optConstant  = std::min(0.0032116 + 0.000321123 * logTimeInSec, 0.00508017);
+        double maxConstant  = std::max(3.3977 + 3.03950 * logTimeInSec, 2.94761);
 
-        optScale = std::min(0.0122 + std::pow(ply + 2.95, 0.462) * optConstant,
-                            0.213 * limits.time[us] / timeLeft)
+        optScale = std::min(0.0121431 + std::pow(ply + 2.94693, 0.461073) * optConstant,
+                            0.213035 * limits.time[us] / timeLeft)
                  * originalTimeAdjust;
 
-        maxScale = std::min(6.64, maxConstant + ply / 12.0);
+        maxScale = std::min(6.67704, maxConstant + ply / 11.9847);
     }
 
     // x moves in y seconds (+ z increment)
     else
     {
-        optScale = std::min((0.88 + ply / 116.4) / mtg, 0.88 * limits.time[us] / timeLeft);
-        maxScale = std::min(6.3, 1.5 + 0.11 * mtg);
+        optScale =
+          std::min((0.88 + ply / 116.4) / (centiMTG / 100.0), 0.88 * limits.time[us] / timeLeft);
+        maxScale = std::min(6.3, 1.5 + 0.11 * (centiMTG / 100.0));
     }
 
     // Limit the maximum possible time for this move
     optimumTime = TimePoint(optScale * timeLeft);
     maximumTime =
-      TimePoint(std::min(0.825 * limits.time[us] - moveOverhead, maxScale * optimumTime)) - 10;
+      TimePoint(std::min(0.825179 * limits.time[us] - moveOverhead, maxScale * optimumTime)) - 10;
 
     if (options["Ponder"])
         optimumTime += optimumTime / 4;