Fix material key for King

[stockfish] / src / material.cpp

diff --git a/src/material.cpp b/src/material.cpp
index b6e239644eefb3c24bcdd861bfe3a675b466d81b..89147352ffe8b62c310a3dd2679806f7cb8fc6f8 100644 (file)
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -192,7 +192,7 @@ Entry* probe(const Position& pos, Table& entries, Endgames& endgames) {
   Value npm_w = pos.non_pawn_material(WHITE);
   Value npm_b = pos.non_pawn_material(BLACK);
 
-  if (npm_w + npm_b == VALUE_ZERO)
+  if (npm_w + npm_b == VALUE_ZERO && pos.pieces(PAWN))
   {
       if (!pos.count<PAWN>(BLACK))
       {