X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=f26ab959ba27ee829c9c07c9c4069b9b3a0a57ba;hp=f1136e3e5b423cfaed45bae25fbc591c341690a7;hb=6ed81f09ffa513f0938c1a16fa4edd55e552c178;hpb=272936eaba8d3a40f4d2d6649fb9a06912bd162c

diff --git a/src/search.cpp b/src/search.cpp
index f1136e3e..f26ab959 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -71,7 +71,7 @@ namespace {
   int Reductions[MAX_MOVES]; // [depth or moveNumber]
 
   Depth reduction(bool i, Depth d, int mn) {
-    int r = Reductions[d / ONE_PLY] * Reductions[mn] / 1024;
+    int r = Reductions[d / ONE_PLY] * Reductions[mn];
     return ((r + 512) / 1024 + (!i && r > 1024)) * ONE_PLY;
   }
 
@@ -149,7 +149,7 @@ namespace {
 void Search::init() {
 
   for (int i = 1; i < MAX_MOVES; ++i)
-     Reductions[i] = int(733.3 * std::log(i));
+     Reductions[i] = int(22.9 * std::log(i));
 }
 
 
@@ -958,7 +958,7 @@ moves_loop: // When in check, search starts from here
 
           if (   !captureOrPromotion
               && !givesCheck
-              && !pos.advanced_pawn_push(move))
+              && (!pos.advanced_pawn_push(move) || pos.non_pawn_material(~us) > BishopValueMg))
           {
               // Move count based pruning (~30 Elo)
               if (moveCountPruning)
@@ -984,7 +984,8 @@ moves_loop: // When in check, search starts from here
               if (!pos.see_ge(move, Value(-29 * lmrDepth * lmrDepth)))
                   continue;
           }
-          else if (!pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
+          else if ((!givesCheck || !(pos.blockers_for_king(~us) & from_sq(move)))
+                  && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
                   continue;
       }