From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Sun, 1 Mar 2020 19:06:37 +0000 (+0100)
Subject: Consider board size in shogi king danger
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=96b6dba17678b02bcdfd659f37da8c4316f177e6;p=fairystockfish.git

Consider board size in shogi king danger

shogi
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 2688 W: 1391 L: 1251 D: 46

minishogi
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 2208 W: 1169 L: 1035 D: 4
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 4248f76..cf696d0 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -584,7 +584,7 @@ namespace {
 
     // For drop games, king danger is independent of game phase
     if (pos.captures_to_hand())
-        score = make_score(mg_value(score), mg_value(score)) * 2 / (2 + 3 * !pos.shogi_doubled_pawn());
+        score = make_score(mg_value(score), mg_value(score)) * 2 / (2 + 16 / pos.max_rank() * !pos.shogi_doubled_pawn());
 
     if (T)
         Trace::add(KING, Us, score);