From: Marco Costalba <mcostalba@gmail.com>
Date: Thu, 11 Dec 2008 15:58:28 +0000 (+0100)
Subject: Disable "Null driven IID" by default
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=07b45151d2f7abfac7030f3bf401a36b5b8c7b8b

Disable "Null driven IID" by default

Testing is not clear. Probably we need to test
at deeper depths to have some clear results.

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

diff --git a/src/search.cpp b/src/search.cpp
index a54d41b9..26d8fde8 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -107,7 +107,7 @@ namespace {
   const bool UseIIDAtNonPVNodes = false;
 
   // Use null move driven internal iterative deepening?
-  bool UseNullDrivenIID = true;
+  bool UseNullDrivenIID = false;
 
   // Internal iterative deepening margin.  At Non-PV moves, when
   // UseIIDAtNonPVNodes is true, we do an internal iterative deepening search
diff --git a/src/ucioption.cpp b/src/ucioption.cpp
index 0c3837ce..054b6c17 100644
--- a/src/ucioption.cpp
+++ b/src/ucioption.cpp
@@ -120,7 +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("Null driven IID", false));
     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));