X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftimeman.cpp;h=47f57ab3b8d290642ef1f34b47f75a5ecdf91d68;hp=c3f66d6cadbfe10f70f93ef3f4ce7148d066c625;hb=e3c85c314d9ae6c1fc25655261c7a1afb77d1568;hpb=2416242c966bfccd5a779e037dfe0d2d4cd8f3fe

diff --git a/src/timeman.cpp b/src/timeman.cpp
index c3f66d6c..47f57ab3 100644
--- a/src/timeman.cpp
+++ b/src/timeman.cpp
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -25,13 +25,15 @@
 #include "timeman.h"
 #include "uci.h"
 
+TimeManagement Time; // Our global time management object
+
 namespace {
 
   enum TimeType { OptimumTime, MaxTime };
 
   const int MoveHorizon   = 50;   // Plan time management at most this many moves ahead
-  const double MaxRatio   = 7.0;  // When in trouble, we can step over reserved time with this ratio
-  const double StealRatio = 0.33; // However we must not steal time from remaining moves over this ratio
+  const double MaxRatio   = 6.93;  // When in trouble, we can step over reserved time with this ratio
+  const double StealRatio = 0.36; // However we must not steal time from remaining moves over this ratio
 
 
   // move_importance() is a skew-logistic function based on naive statistical
@@ -41,9 +43,9 @@ namespace {
 
   double move_importance(int ply) {
 
-    const double XScale = 9.3;
-    const double XShift = 59.8;
-    const double Skew   = 0.172;
+    const double XScale = 8.27;
+    const double XShift = 59.;
+    const double Skew   = 0.179;
 
     return pow((1 + exp((ply - XShift) / XScale)), -Skew) + DBL_MIN; // Ensure non-zero
   }
@@ -63,7 +65,7 @@ namespace {
     double ratio1 = (TMaxRatio * moveImportance) / (TMaxRatio * moveImportance + otherMovesImportance);
     double ratio2 = (moveImportance + TStealRatio * otherMovesImportance) / (moveImportance + otherMovesImportance);
 
-    return myTime * std::min(ratio1, ratio2);
+    return int(myTime * std::min(ratio1, ratio2)); // Intel C++ asks an explicit cast
   }
 
 } // namespace
@@ -78,15 +80,31 @@ namespace {
 ///  inc >  0 && movestogo == 0 means: x basetime + z increment
 ///  inc >  0 && movestogo != 0 means: x moves in y minutes + z increment
 
-void TimeManager::init(const Search::LimitsType& limits, Color us, int ply)
+void TimeManagement::init(Search::LimitsType& limits, Color us, int ply)
 {
   int minThinkingTime = Options["Minimum Thinking Time"];
   int moveOverhead    = Options["Move Overhead"];
   int slowMover       = Options["Slow Mover"];
+  int npmsec          = Options["nodestime"];
+
+  // If we have to play in 'nodes as time' mode, then convert from time
+  // to nodes, and use resulting values in time management formulas.
+  // WARNING: Given npms (nodes per millisecond) must be much lower then
+  // real engine speed to avoid time losses.
+  if (npmsec)
+  {
+      if (!availableNodes) // Only once at game start
+          availableNodes = npmsec * limits.time[us]; // Time is in msec
 
-  // Initialize unstablePvFactor to 1 and search times to maximum values
+      // Convert from millisecs to nodes
+      limits.time[us] = (int)availableNodes;
+      limits.inc[us] *= npmsec;
+      limits.npmsec = npmsec;
+  }
+
+  startTime = limits.startTime;
   unstablePvFactor = 1;
-  optimumSearchTime = maximumSearchTime = std::max(limits.time[us], minThinkingTime);
+  optimumTime = maximumTime = std::max(limits.time[us], minThinkingTime);
 
   const int MaxMTG = limits.movestogo ? std::min(limits.movestogo, MoveHorizon) : MoveHorizon;
 
@@ -105,12 +123,10 @@ void TimeManager::init(const Search::LimitsType& limits, Color us, int ply)
       int t1 = minThinkingTime + remaining<OptimumTime>(hypMyTime, hypMTG, ply, slowMover);
       int t2 = minThinkingTime + remaining<MaxTime    >(hypMyTime, hypMTG, ply, slowMover);
 
-      optimumSearchTime = std::min(t1, optimumSearchTime);
-      maximumSearchTime = std::min(t2, maximumSearchTime);
+      optimumTime = std::min(t1, optimumTime);
+      maximumTime = std::min(t2, maximumTime);
   }
 
   if (Options["Ponder"])
-      optimumSearchTime += optimumSearchTime / 4;
-
-  optimumSearchTime = std::min(optimumSearchTime, maximumSearchTime);
+      optimumTime += optimumTime / 4;
 }