From: gbtami <gbtami@gmail.com>
Date: Wed, 7 Aug 2019 11:58:05 +0000 (+0200)
Subject: Fix updating gates on castling move
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=0f48768c5ecbc705f4a92096598ad748eaccc7f6;p=fairystockfish.git

Fix updating gates on castling move
---

diff --git a/src/position.cpp b/src/position.cpp
index def94c0..1eede29 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -1296,8 +1296,8 @@ void Position::do_move(Move m, StateInfo& newSt, bool givesCheck) {
   {
       if (is_ok(from) && (gates(us) & from))
           st->gatesBB[us] ^= from;
-      if (type_of(m) == CASTLING)
-          st->gatesBB[us] ^= to;
+      if (type_of(m) == CASTLING && (gates(us) & to_sq(m)))
+          st->gatesBB[us] ^= to_sq(m);
       if (gates(them) & to)
           st->gatesBB[them] ^= to;
       if (!count_in_hand(us, ALL_PIECES) && !captures_to_hand())