X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=e6446768066afa33f95d8b6f2aec9faa62abc90e;hp=8993a4b05fbf3069c8f55e092cfa4d27ee6b8dc5;hb=4ae5a7b45a430aea5f4b21f9455b4db74ed1c44a;hpb=93349d0dbd22f063b39e6815c02835a4748fffbc

diff --git a/src/search.cpp b/src/search.cpp
index 8993a4b0..e6446768 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -739,7 +739,7 @@ namespace {
     }
     else if (ttHit)
     {
-        // Never assume anything on values stored in TT
+        // Never assume anything about values stored in TT
         ss->staticEval = eval = tte->eval();
         if (eval == VALUE_NONE)
             ss->staticEval = eval = evaluate(pos);
@@ -978,7 +978,7 @@ moves_loop: // When in check, search starts from here
 
       // Check extension (~2 Elo)
       else if (    givesCheck
-               && (pos.blockers_for_king(~us) & from_sq(move) || pos.see_ge(move)))
+               && (pos.is_discovery_check_on_king(~us, move) || pos.see_ge(move)))
           extension = ONE_PLY;
 
       // Castling extension
@@ -1013,7 +1013,7 @@ moves_loop: // When in check, search starts from here
               && !givesCheck
               && (!pos.advanced_pawn_push(move) || pos.non_pawn_material(~us) > BishopValueMg))
           {
-              // Move count based pruning (~30 Elo)
+              // Move count based pruning
               if (moveCountPruning)
                   continue;
 
@@ -1037,8 +1037,8 @@ moves_loop: // When in check, search starts from here
               if (!pos.see_ge(move, Value(-29 * lmrDepth * lmrDepth)))
                   continue;
           }
-          else if ((!givesCheck || !extension)
-                  && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
+          else if (  (!givesCheck || !extension)
+                   && !pos.see_ge(move, -PawnValueEg * (depth / ONE_PLY))) // (~20 Elo)
                   continue;
       }
 
@@ -1115,7 +1115,7 @@ moves_loop: // When in check, search starts from here
                   r += ONE_PLY;
 
               // Decrease/increase reduction for moves with a good/bad history (~30 Elo)
-              r -= ss->statScore / 20000 * ONE_PLY;
+              r -= ss->statScore / 16384 * ONE_PLY;
           }
 
           Depth d = clamp(newDepth - r, ONE_PLY, newDepth);
@@ -1341,7 +1341,7 @@ moves_loop: // When in check, search starts from here
     {
         if (ttHit)
         {
-            // Never assume anything on values stored in TT
+            // Never assume anything about values stored in TT
             if ((ss->staticEval = bestValue = tte->eval()) == VALUE_NONE)
                 ss->staticEval = bestValue = evaluate(pos);