From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Fri, 2 Nov 2018 19:09:48 +0000 (+0100)
Subject: Skip scale factor evaluation for drop games
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=3ff7f754485512ace086a659f494f90cbd24e2a0;p=fairystockfish.git

Skip scale factor evaluation for drop games

shogi
ELO: 30.48 +-33.6 (95%) LOS: 96.4%
Total: 400 W: 210 L: 175 D: 15

euroshogi
ELO: 7.82 +-33.2 (95%) LOS: 67.8%
Total: 400 W: 194 L: 185 D: 21

minishogi
ELO: 6.95 +-32.9 (95%) LOS: 66.1%
Total: 400 W: 190 L: 182 D: 28

crazyhouse STC
LLR: -2.97 (-2.94,2.94) [-10.00,5.00]
Total: 8880 W: 4262 L: 4393 D: 225
http://35.161.250.236:6543/tests/view/5bdca1f56e23db7639060c58

crazyhouse LTC
LLR: 2.96 (-2.94,2.94) [-10.00,5.00]
Total: 1761 W: 882 L: 828 D: 51
http://35.161.250.236:6543/tests/view/5be616ff6e23db7639060c7b
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 4c0a341..673ecb4 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -902,7 +902,7 @@ namespace {
     int sf = me->scale_factor(pos, strongSide);
 
     // If scale is not already specific, scale down the endgame via general heuristics
-    if (sf == SCALE_FACTOR_NORMAL)
+    if (sf == SCALE_FACTOR_NORMAL && !pos.captures_to_hand())
     {
         if (pos.opposite_bishops())
         {