Remove doEvenDeeperSearch

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 7d567b8ab71058d9b6c78b2424142da9f568ec16..ae83ab3475831d91b07668c94599c89404b4ef3e 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1190,12 +1190,9 @@ moves_loop:  // When in check, search starts here
                 // Adjust full-depth search based on LMR results - if the result
                 // was good enough search deeper, if it was bad enough search shallower.
                 const bool doDeeperSearch     = value > (bestValue + 51 + 10 * (newDepth - d));
-                const bool doEvenDeeperSearch = value > alpha + 700 && ss->doubleExtensions <= 6;
                 const bool doShallowerSearch  = value < bestValue + newDepth;
 
-                ss->doubleExtensions = ss->doubleExtensions + doEvenDeeperSearch;
-
-                newDepth += doDeeperSearch - doShallowerSearch + doEvenDeeperSearch;
+                newDepth += doDeeperSearch - doShallowerSearch;
 
                 if (newDepth > d)
                     value = -search<NonPV>(pos, ss + 1, -(alpha + 1), -alpha, newDepth, !cutNode);