X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fpawns.cpp;h=3023021d408a853a93c2294c73f4bec74b01aa50;hb=b7ecdaada7e2690dd286c41d3a73463f06fb088f;hp=04222a2aa4ee98544afd22d193850c5012fa5ba4;hpb=97a0e4e8170df33b927c48d734e0132e9ef8a22f;p=stockfish

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 04222a2a..3023021d 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -124,6 +124,8 @@ namespace {
                 || (   stoppers == blocked && r >= RANK_5
                     && (shift<Up>(support) & ~(theirPawns | doubleAttackThem)));
 
+        passed &= !(forward_file_bb(Us, s) & ourPawns);
+
         // Passed pawns will be properly scored later in evaluation when we have
         // full attack info.
         if (passed)
@@ -193,7 +195,7 @@ Score Entry::evaluate_shelter(const Position& pos, Square ksq) {
 
   Score bonus = make_score(5, 5);
 
-  File center = clamp(file_of(ksq), FILE_B, FILE_G);
+  File center = Utility::clamp(file_of(ksq), FILE_B, FILE_G);
   for (File f = File(center - 1); f <= File(center + 1); ++f)
   {
       b = ourPawns & file_bb(f);
@@ -202,7 +204,7 @@ Score Entry::evaluate_shelter(const Position& pos, Square ksq) {
       b = theirPawns & file_bb(f);
       int theirRank = b ? relative_rank(Us, frontmost_sq(Them, b)) : 0;
 
-      File d = map_to_queenside(f);
+      File d = edge_distance(f);
       bonus += make_score(ShelterStrength[d][ourRank], 0);
 
       if (ourRank && (ourRank == theirRank - 1))