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Simplify away king infiltration.

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STC :
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 91438 W: 17496 L: 17438 D: 56504
Ptnml(0-2): 1573, 10711, 21067, 10790, 1563
https://tests.stockfishchess.org/tests/view/5e34812630ae32da08941d65

LTC :
LLR: 2.96 (-2.94,2.94) {-1.50,0.50}
Total: 40485 W: 5246 L: 5177 D: 30062
Ptnml(0-2): 289, 3818, 11976, 3812, 327
https://tests.stockfishchess.org/tests/view/5e354daee70d848499f6380c

closes https://github.com/official-stockfish/Stockfish/pull/2542

Bench: 5047825
This commit is contained in:
xoto10 2020-01-31 15:55:29 +00:00 • committed by Joost VandeVondele
parent c390b734c4
commit 0f37da0e34
1 changed files with 1 additions and 5 deletions
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6
src/evaluate.cpp
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@ -701,9 +701,6 @@ namespace {
int outflanking = distance<File>(pos.square<KING>(WHITE), pos.square<KING>(BLACK)) int outflanking = distance<File>(pos.square<KING>(WHITE), pos.square<KING>(BLACK))
- distance<Rank>(pos.square<KING>(WHITE), pos.square<KING>(BLACK)); - distance<Rank>(pos.square<KING>(WHITE), pos.square<KING>(BLACK));
bool infiltration = rank_of(pos.square<KING>(WHITE)) > RANK_4
|| rank_of(pos.square<KING>(BLACK)) < RANK_5;
bool pawnsOnBothFlanks = (pos.pieces(PAWN) & QueenSide) bool pawnsOnBothFlanks = (pos.pieces(PAWN) & QueenSide)
&& (pos.pieces(PAWN) & KingSide); && (pos.pieces(PAWN) & KingSide);
@ -715,11 +712,10 @@ namespace {
int complexity = 9 * pe->passed_count() int complexity = 9 * pe->passed_count()
+ 11 * pos.count<PAWN>() + 11 * pos.count<PAWN>()
+ 9 * outflanking + 9 * outflanking
+ 12 * infiltration
+ 21 * pawnsOnBothFlanks + 21 * pawnsOnBothFlanks
+ 51 * !pos.non_pawn_material() + 51 * !pos.non_pawn_material()
- 43 * almostUnwinnable - 43 * almostUnwinnable
- 100 ; - 95 ;
// Give more importance to non-material score // Give more importance to non-material score
Value mg = mg_value(score); Value mg = mg_value(score);