diff --git a/Reversi.xcodeproj/project.xcworkspace/xcuserdata/sasa.xcuserdatad/UserInterfaceState.xcuserstate b/Reversi.xcodeproj/project.xcworkspace/xcuserdata/sasa.xcuserdatad/UserInterfaceState.xcuserstate
index f37f07e..8c16edd 100644
Binary files a/Reversi.xcodeproj/project.xcworkspace/xcuserdata/sasa.xcuserdatad/UserInterfaceState.xcuserstate and b/Reversi.xcodeproj/project.xcworkspace/xcuserdata/sasa.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Reversi/book/cow.h b/Reversi/book/cow.h
index f899d19..9df28f2 100644
--- a/Reversi/book/cow.h
+++ b/Reversi/book/cow.h
@@ -40,7 +40,6 @@ const ankerl::unordered_dense::map<std::pair<uint64_t, uint64_t>, uint64_t> book
 
 const ankerl::unordered_dense::map<std::pair<uint64_t, uint64_t>, uint64_t> book_ura_yotto = {
     {std::make_pair(0x800080800, 0x101E140000), 0x20000},
-    {std::make_pair(0x101A100000, 0x8040E0800), 0x8}
 };
 
 
diff --git a/Reversi/reversi.cpp b/Reversi/reversi.cpp
index 02f7328..f3305d8 100644
--- a/Reversi/reversi.cpp
+++ b/Reversi/reversi.cpp
@@ -1449,8 +1449,7 @@ inline int score_fixedstone(const uint64_t &playerboard, const uint64_t &opponen
 }
 
 inline int countscore(const uint64_t &playerboard, const uint64_t &opponentboard, const char &afterIndex) {
-    return (afterIndex >= 60) ? __builtin_popcountll(playerboard) - __builtin_popcountll(opponentboard) :
-           (!playerboard) ? MIN_INF :
+    return (!playerboard) ? MIN_INF :
            (!opponentboard) ? MAX_INF :
            (afterIndex >= 41) ? score_stone(playerboard, opponentboard)*3 + score_fixedstone(playerboard, opponentboard) * 20:
            score_stone(playerboard, opponentboard)*3 + score_fixedstone(playerboard, opponentboard)*20 + score_putable(playerboard, opponentboard);