From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Thu, 23 Jan 2020 18:25:59 +0000 (+0100)
Subject: Speed-up for CTF variants
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=645590b4ba6af4476dbaa0ce7db42cd92ad8af32;p=fairystockfish.git

Speed-up for CTF variants

racingkings STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 576 W: 235 L: 151 D: 190
http://www.variantfishtest.org:6543/tests/view/5e28c2806e23db46beba4cc8

kingofthehill STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 842 W: 410 L: 309 D: 123
http://www.variantfishtest.org:6543/tests/view/5e28c2726e23db46beba4cc5
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index e552fe0..86f383a 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -892,7 +892,7 @@ namespace {
             {
                 Square s2 = pop_lsb(&target_squares);
                 int dist =  distance(s1, s2)
-                          + (isKingCTF ? popcount(pos.attackers_to(s2) & pos.pieces(Them)) : 0)
+                          + (isKingCTF ? popcount(pos.attackers_to(s2, Them)) : 0)
                           + !!(pos.pieces(Us) & s2);
                 score += make_score(2500, 2500) / (1 + scale * dist * dist);
             }