Simplify fail high reduction formula

Author: FauziAkram

src/search.cpp

@@ -1109,8 +1109,7 @@ Value Search::Worker::search(
 
         // Increase reduction if next ply has a lot of fail high
         if ((ss + 1)->cutoffCnt > 1)
-            r += 120 + 1024 * ((ss + 1)->cutoffCnt > 2) + 100 * ((ss + 1)->cutoffCnt > 3)
-               + 1024 * allNode;
+            r += 256 + 1024 * ((ss + 1)->cutoffCnt > 2) + 1024 * allNode;
 
         // For first picked move (ttMove) reduce reduction
         if (move == ttData.move)