From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Fri, 3 Apr 2020 21:48:33 +0000 (+0200)
Subject: Tweak king safety evaluation for Janggi
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=e99f9e1c933d85c568924b1de93ae2c1482f0f54;p=fairystockfish.git

Tweak king safety evaluation for Janggi

janggi
LLR: 3.00 (-2.94,2.94) [0.00,10.00]
Total: 590 W: 325 L: 220 D: 45
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 58a7c27..638789f 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -584,7 +584,8 @@ namespace {
                  +  69 * kingAttacksCount[Them] * (2 + 8 * pos.check_counting() + pos.captures_to_hand()) / 2
                  +   3 * kingFlankAttack * kingFlankAttack / 8
                  +       mg_value(mobility[Them] - mobility[Us])
-                 - 873 * !(pos.major_pieces(Them) || pos.captures_to_hand() || pos.king_type() == WAZIR) / (1 + pos.check_counting() + pos.two_boards() + pos.makpong())
+                 - 873 * !(pos.major_pieces(Them) || pos.captures_to_hand() || (pos.king_type() == WAZIR && !pos.diagonal_lines()))
+                       / (1 + pos.check_counting() + pos.two_boards() + pos.makpong())
                  - 100 * bool(attackedBy[Us][KNIGHT] & attackedBy[Us][KING])
                  -   6 * mg_value(score) / 8
                  -   4 * kingFlankDefense