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Remove KRPPKRPScaleFactors array

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Fucntional simplification that removes the KRPPKRPScaleFactors array.

STC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 47374 W: 9159 L: 9049 D: 29166
Ptnml(0-2): 707, 5325, 11560, 5341, 754
http://tests.stockfishchess.org/tests/view/5e5ff464e42a5c3b3ca2e156

LTC
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 31268 W: 4064 L: 3995 D: 23209
Ptnml(0-2): 173, 2734, 9764, 2777, 186
http://tests.stockfishchess.org/tests/view/5e61be6ce42a5c3b3ca2e1c1

closes https://github.com/official-stockfish/Stockfish/pull/2575

Bench 5123316
This commit is contained in:
protonspring
2020-03-04 11:32:17 -07:00
committed by Joost VandeVondele
parent e7c1c8c1ab
commit 9690cd6295
1 changed files with 1 additions and 4 deletions
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5
src/endgame.cpp
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@@ -58,9 +58,6 @@ namespace {
inline int push_close(Square s1, Square s2) { return 140 - 20 * distance(s1, s2); } inline int push_close(Square s1, Square s2) { return 140 - 20 * distance(s1, s2); }
inline int push_away(Square s1, Square s2) { return 120 - push_close(s1, s2); } inline int push_away(Square s1, Square s2) { return 120 - push_close(s1, s2); }
// Pawn Rank based scaling factors used in KRPPKRP endgame
constexpr int KRPPKRPScaleFactors[RANK_NB] = { 0, 9, 10, 14, 21, 44, 0, 0 };
#ifndef NDEBUG #ifndef NDEBUG
bool verify_material(const Position& pos, Color c, Value npm, int pawnsCnt) { bool verify_material(const Position& pos, Color c, Value npm, int pawnsCnt) {
return pos.non_pawn_material(c) == npm && pos.count<PAWN>(c) == pawnsCnt; return pos.non_pawn_material(c) == npm && pos.count<PAWN>(c) == pawnsCnt;
@@ -587,7 +584,7 @@ ScaleFactor Endgame<KRPPKRP>::operator()(const Position& pos) const {
&& relative_rank(strongSide, bksq) > r) && relative_rank(strongSide, bksq) > r)
{ {
assert(r > RANK_1 && r < RANK_7); assert(r > RANK_1 && r < RANK_7);
return ScaleFactor(KRPPKRPScaleFactors[r]); return ScaleFactor(7 * r);
} }
return SCALE_FACTOR_NONE; return SCALE_FACTOR_NONE;
} }