From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Sun, 2 Sep 2018 15:10:00 +0000 (+0200)
Subject: Skip king safety evaluation if checking is illegal
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=4f7f868d55b4ef40699d56cccbc04eac17b6257f;p=fairystockfish.git

Skip king safety evaluation if checking is illegal

STC racingkings
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 120 W: 106 L: 10 D: 4
http://35.161.250.236:6543/tests/view/5b8bfdd66e23db0fbab0dd3f
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 69a9ca4..e9307df 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -427,7 +427,7 @@ namespace {
     constexpr Bitboard Camp = (Us == WHITE ? AllSquares ^ Rank6BB ^ Rank7BB ^ Rank8BB
                                            : AllSquares ^ Rank1BB ^ Rank2BB ^ Rank3BB);
 
-    if (!pos.count<KING>(Us))
+    if (!pos.count<KING>(Us) || !pos.checking_permitted())
         return SCORE_ZERO;
 
     const Square ksq = pos.square<KING>(Us);