From: fanon <felix.bolanos@gmail.com>
Date: Sun, 20 Mar 2016 16:50:32 +0000 (-0600)
Subject: Simplify pawns King Safety calculation
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=5d1644ba696c0a4d81450f922d216bf6479d4929;hp=60590577f2117dbc9305184660a3fe8fe6f89f85

Simplify pawns King Safety calculation

STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 130209 W: 23516 L: 23581 D: 83112

LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 33541 W: 4563 L: 4460 D: 24518

Bench: 8644370

Resolves #604
---

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 0642c679..9239bfac 100644
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -288,9 +288,6 @@ Score Entry::do_king_safety(const Position& pos, Square ksq) {
   if (pawns)
       while (!(DistanceRingBB[ksq][minKingPawnDistance++] & pawns)) {}
 
-  if (relative_rank(Us, ksq) > RANK_4)
-      return make_score(0, -16 * minKingPawnDistance);
-
   Value bonus = shelter_storm<Us>(pos, ksq);
 
   // If we can castle use the bonus after the castling if it is bigger