From: Fabian Fichter <ianfab@users.noreply.github.com>
Date: Fri, 24 May 2019 17:55:16 +0000 (+0200)
Subject: Tweak connected bonus for horde chess
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=bd9b55451b622d31414d1f9993ccaeeb8079f206;p=fairystockfish.git

Tweak connected bonus for horde chess

horde STC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 443 W: 273 L: 165 D: 5
http://35.161.250.236:6543/tests/view/5ce8fc696e23db34f4206b38

horde LTC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 394 W: 250 L: 142 D: 2
http://35.161.250.236:6543/tests/view/5ce914f66e23db34f4206b3b
---

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 2acdf0b..921e53b 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -130,6 +130,8 @@ namespace {
         if (support | phalanx)
         {
             int v = (phalanx ? 3 : 2) * Connected[r];
+            if (r >= RANK_4 && pos.count<PAWN>(Us) > popcount(pos.board_bb()) / 4)
+                v = std::max(v, popcount(support | phalanx) * 100);
             v = 17 * popcount(support) + (v >> (opposed + 1));
             score += make_score(v, v * (r - 2) / 4);
         }