Revert "Do IID also when we already have a ttMove"

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 693bea940548f31d975db84c428d2b8273819c8a..a97d3e025b070922448486522a7c1068d68d2d44 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1237,7 +1237,7 @@ namespace {
 
     // Step 9. Internal iterative deepening
     if (    depth >= IIDDepth[PvNode]
-        && (ttMove == MOVE_NONE || (PvNode && tte->depth() <= depth - 4 * OnePly))
+        &&  ttMove == MOVE_NONE
         && (PvNode || (!isCheck && ss->eval >= beta - IIDMargin)))
     {
         Depth d = (PvNode ? depth - 2 * OnePly : depth / 2);