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Remove Overload bonus

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Compensate by giving the Hanging bonus to weak doubly-attacked
non pawn enemies pieces.

STC: http://tests.stockfishchess.org/tests/view/5bfd53c40ebc5902bced9237
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 62107 W: 13664 L: 13622 D: 34821

LTC: http://tests.stockfishchess.org/tests/view/5bfd74700ebc5902bced9618
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 86406 W: 14381 L: 14365 D: 57660

A possible follow up would be to tune the hanging bonus and/or try to
simplify the hanging bonus condition.

Bench: 3810849
This commit is contained in:
ElbertoOne
2018-12-01 10:28:10 +01:00
committed by Stéphane Nicolet
parent 9b276a6596
commit 79e3710fd2
2 changed files with 5 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
AUTHORS
+2 -2
View File
@@ -20,9 +20,9 @@ Balint Pfliegel
Ben Koshy (BKSpurgeon) Ben Koshy (BKSpurgeon)
Bill Henry (VoyagerOne) Bill Henry (VoyagerOne)
braich braich
Bojun Guo (noobpwnftw)
Brian Sheppard (SapphireBrand) Brian Sheppard (SapphireBrand)
Bryan Cross (crossbr) Bryan Cross (crossbr)
Bujun Guo (noobpwnftw)
Chris Cain (ceebo) Chris Cain (ceebo)
Dan Schmidt Dan Schmidt
Daniel Dugovic (ddugovic) Daniel Dugovic (ddugovic)
@@ -31,7 +31,6 @@ David Zar
Daylen Yang (daylen) Daylen Yang (daylen)
DiscanX DiscanX
Eelco de Groot Eelco de Groot
ElbertoOne
erbsenzaehler erbsenzaehler
Ernesto Gatti Ernesto Gatti
Fabian Beuke (madnight) Fabian Beuke (madnight)
@@ -76,6 +75,7 @@ Leonardo Ljubičić (ICCF World Champion)
Leonid Pechenik (lp--) Leonid Pechenik (lp--)
Linus Arver Linus Arver
loco-loco loco-loco
Lub van den Berg (ElbertoOne)
Luca Brivio (lucabrivio) Luca Brivio (lucabrivio)
Lucas Braesch (lucasart) Lucas Braesch (lucasart)
Lyudmil Antonov (lantonov) Lyudmil Antonov (lantonov)
src/evaluate.cpp
+3 -5
View File
@@ -160,7 +160,6 @@ namespace {
constexpr Score KnightOnQueen = S( 20, 12); constexpr Score KnightOnQueen = S( 20, 12);
constexpr Score LongDiagonalBishop = S( 44, 0); constexpr Score LongDiagonalBishop = S( 44, 0);
constexpr Score MinorBehindPawn = S( 16, 0); constexpr Score MinorBehindPawn = S( 16, 0);
constexpr Score Overload = S( 12, 6);
constexpr Score PawnlessFlank = S( 18, 94); constexpr Score PawnlessFlank = S( 18, 94);
constexpr Score RestrictedPiece = S( 7, 6); constexpr Score RestrictedPiece = S( 7, 6);
constexpr Score RookOnPawn = S( 10, 28); constexpr Score RookOnPawn = S( 10, 28);
@@ -553,10 +552,9 @@ namespace {
if (weak & attackedBy[Us][KING]) if (weak & attackedBy[Us][KING])
score += ThreatByKing; score += ThreatByKing;
score += Hanging * popcount(weak & ~attackedBy[Them][ALL_PIECES]); b = ~attackedBy[Them][ALL_PIECES]
| (nonPawnEnemies & attackedBy2[Us]);
b = weak & nonPawnEnemies & attackedBy[Them][ALL_PIECES]; score += Hanging * popcount(weak & b);
score += Overload * popcount(b);
} }
// Bonus for restricting their piece moves // Bonus for restricting their piece moves