From: Marco Costalba <mcostalba@gmail.com>
Date: Tue, 22 Oct 2013 15:33:11 +0000 (+0200)
Subject: Re-add "Further increase safe checks bonus"
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=f86d2aee29d9fd86a29e976698c76afc2a187903

Re-add "Further increase safe checks bonus"

After 40K games at 60 secs, result is still
not clear, but not a regression against SF 4

After
ELO: 50.11 +-2.1 (95%) LOS: 100.0%
Total: 40000 W: 10547 L: 4817 D: 24636

Before
ELO: 49.51 +-2.1 (95%) LOS: 100.0%
Total: 40000 W: 10483 L: 4821 D: 24696

So re-apply the patch to avoid to
special-case this one.

bench: 7403882
---

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index f3586f96..787004b4 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -200,12 +200,12 @@ namespace {
   const int KingAttackWeights[] = { 0, 0, 2, 2, 3, 5 };
 
   // Bonuses for enemy's safe checks
-  const int QueenContactCheck = 12;
-  const int RookContactCheck  = 8;
-  const int QueenCheck        = 6;
-  const int RookCheck         = 4;
-  const int BishopCheck       = 1;
-  const int KnightCheck       = 2;
+  const int QueenContactCheck = 24;
+  const int RookContactCheck  = 16;
+  const int QueenCheck        = 12;
+  const int RookCheck         = 8;
+  const int BishopCheck       = 2;
+  const int KnightCheck       = 3;
 
   // KingExposed[Square] contains penalties based on the position of the
   // defending king, indexed by king's square (from white's point of view).