From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Fri, 3 Apr 2020 21:57:04 +0000 (+0200)
Subject: Consider Janggi cannon restrictions in evaluation
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=2ffdf8ba25f8c12b504af17a10b418f0607b8ee0;p=fairystockfish.git

Consider Janggi cannon restrictions in evaluation

janggi
LLR: 2.99 (-2.94,2.94) [0.00,10.00]
Total: 694 W: 364 L: 260 D: 70
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 638789f..12c7067 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -321,6 +321,12 @@ namespace {
             score -= make_score(PieceValue[MG][Pt], PieceValue[EG][Pt]) / 3;
         }
 
+        if (Pt == JANGGI_CANNON)
+        {
+            b &= ~pos.pieces(Pt);
+            b &= attacks_bb(Us, Pt, s, pos.pieces() ^ pos.pieces(Pt));
+        }
+
         if (pos.blockers_for_king(Us) & s)
             b &= LineBB[pos.square<KING>(Us)][s];