More IID for drop games

STC crazyhouse
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 8079 W: 4045 L: 3829 D: 205
http://35.161.250.236:6543/tests/view/5bd0e26e6e23db7639060c16

diff --git a/src/search.cpp b/src/search.cpp
index 4b3f817..6528572 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -838,7 +838,7 @@ namespace {
     }
 
     // Step 11. Internal iterative deepening (~2 Elo)
-    if (    depth >= 8 * ONE_PLY
+    if (    depth >= (8 - 2 * pos.captures_to_hand()) * ONE_PLY
         && !ttMove)
     {
         search<NT>(pos, ss, alpha, beta, depth - 7 * ONE_PLY, cutNode);