Add "Slow Mover" UCI parameter to adjust time management

With default value of 100 no change in regard of current
behaviour. Increasing the value makes SF to think a
longer time for each move. Decreasing the value makes SF
to move faster.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

diff --git a/src/timeman.cpp b/src/timeman.cpp
index 92d88e73cb0445f723694f67628afbb99ef361d0..9ca46c93313c7bf86f75f747ae7ed53923feeaaa 100644 (file)
--- a/src/timeman.cpp
+++ b/src/timeman.cpp
@@ -72,7 +72,7 @@ namespace {
   enum TimeType { OptimumTime, MaxTime };
 
   template<TimeType>
-  int remaining(int myTime, int movesToGo, int fullMoveNumber);
+  int remaining(int myTime, int movesToGo, int fullMoveNumber, int slowMover);
 }
 
 
@@ -107,6 +107,7 @@ void TimeManager::init(const Search::LimitsType& limits, int currentPly)
   int emergencyBaseTime    = Options["Emergency Base Time"];
   int emergencyMoveTime    = Options["Emergency Move Time"];
   int minThinkingTime      = Options["Minimum Thinking Time"];
+  int slowMover            = Options["Slow Mover"];
 
   // Initialize to maximum values but unstablePVExtraTime that is reset
   unstablePVExtraTime = 0;
@@ -124,8 +125,8 @@ void TimeManager::init(const Search::LimitsType& limits, int currentPly)
 
       hypMyTime = std::max(hypMyTime, 0);
 
-      t1 = minThinkingTime + remaining<OptimumTime>(hypMyTime, hypMTG, currentPly);
-      t2 = minThinkingTime + remaining<MaxTime>(hypMyTime, hypMTG, currentPly);
+      t1 = minThinkingTime + remaining<OptimumTime>(hypMyTime, hypMTG, currentPly, slowMover);
+      t2 = minThinkingTime + remaining<MaxTime>(hypMyTime, hypMTG, currentPly, slowMover);
 
       optimumSearchTime = std::min(optimumSearchTime, t1);
       maximumSearchTime = std::min(maximumSearchTime, t2);
@@ -142,12 +143,12 @@ void TimeManager::init(const Search::LimitsType& limits, int currentPly)
 namespace {
 
   template<TimeType T>
-  int remaining(int myTime, int movesToGo, int currentPly)
+  int remaining(int myTime, int movesToGo, int currentPly, int slowMover)
   {
     const float TMaxRatio   = (T == OptimumTime ? 1 : MaxRatio);
     const float TStealRatio = (T == OptimumTime ? 0 : StealRatio);
 
-    int thisMoveImportance = move_importance(currentPly);
+    int thisMoveImportance = move_importance(currentPly) * slowMover / 100;
     int otherMovesImportance = 0;
 
     for (int i = 1; i < movesToGo; i++)

diff --git a/src/ucioption.cpp b/src/ucioption.cpp
index 132760c9499dd4fad6c282414ea7c5f1fc85e6e5..c754353e0f82aa7349f2c49031a4edb2674076b8 100644 (file)
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@ -72,6 +72,7 @@ OptionsMap::OptionsMap() {
   o["Emergency Base Time"]         = UCIOption(200, 0, 30000);
   o["Emergency Move Time"]         = UCIOption(70, 0, 5000);
   o["Minimum Thinking Time"]       = UCIOption(20, 0, 5000);
+  o["Slow Mover"]                  = UCIOption(100, 10, 1000);
   o["UCI_Chess960"]                = UCIOption(false);
   o["UCI_AnalyseMode"]             = UCIOption(false);
 }