From: ianfab <ianfab@users.noreply.github.com>
Date: Sat, 25 Aug 2018 17:42:43 +0000 (+0200)
Subject: Increase mobility bonus
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=e53952775589681f777ff4c7f33e27b4b9f32941;p=fairystockfish.git

Increase mobility bonus

Double mobility bonus for drop and antichess variants.

STC giveaway
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 1946 W: 816 L: 705 D: 425
http://35.161.250.236:6543/tests/view/5b81957f6e23db0fbab0dce8

STC crazyhouse
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 3138 W: 1617 L: 1471 D: 50
http://35.161.250.236:6543/tests/view/5b8195546e23db0fbab0dce2
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 971b44c..cc6d0ba 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -950,7 +950,7 @@ namespace {
     for (PieceType pt = KNIGHT; pt < KING; ++pt)
         score += pieces<WHITE>(pt) - pieces<BLACK>(pt);
 
-    score += mobility[WHITE] - mobility[BLACK];
+    score += (mobility[WHITE] - mobility[BLACK]) * (1 + pos.captures_to_hand() + pos.must_capture());
 
     score +=  king<   WHITE>() - king<   BLACK>()
             + threats<WHITE>() - threats<BLACK>()