Add "Null driven IID" UCI option (default true)

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

diff --git a/src/search.cpp b/src/search.cpp
index 2a2e32f943fae435ef69719364504b7b2f58fedc..dd5e921ef41bb605e543295bcd3d40ee64f14b9b 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -393,6 +393,7 @@ void think(const Position &pos, bool infinite, bool ponder, int side_to_move,
   if (UseLogFile)
       LogFile.open(get_option_value_string("Search Log Filename").c_str(), std::ios::out | std::ios::app);
 
+  UseNullDrivenIID = get_option_value_bool("Null driven IID");
   UseQSearchFutilityPruning = get_option_value_bool("Futility Pruning (Quiescence Search)");
   UseFutilityPruning = get_option_value_bool("Futility Pruning (Main Search)");
 

diff --git a/src/ucioption.cpp b/src/ucioption.cpp
index 79f9886897794b0e211c5cbbf63c3cc4b7dcb2af..0c3837ce869b64cdf02d2d856f4427832a8fafcf 100644 (file)
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@ -120,6 +120,7 @@ namespace {
     o.push_back(Option("Full Depth Moves (non-PV nodes)", 3, 1, 100));
     o.push_back(Option("Threat Depth", 5, 0, 100));
     o.push_back(Option("Selective Plies", 7, 0, 10));
+    o.push_back(Option("Null driven IID", true));
     o.push_back(Option("Futility Pruning (Main Search)", true));
     o.push_back(Option("Futility Pruning (Quiescence Search)", true));
     o.push_back(Option("Futility Margin 0", 50, 0, 1000));