If an enemy piece is defended by a pawn don't give the
extra mobility bonus in case we attack it.
Joona says that "Paralyzing pawn" is usually worth of nothing.
On Joona QUAD after 964 games:
Orig - Patch_2: 191 - 218 - 555 (+ 10 elo)
On my PC after 999 games at 1+0:
Mod vs Orig +227 =550 -222 50.25% 502.0/999 +2 ELO
In both cases we tested against the original version (without
increased mobility), not against the previous patch that instead
seems to fail on Joona QUAD:
Orig vs. Prev.Patch: 237 - 217 - 627 (-6 elo)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
ei.kingAdjacentZoneAttacksCount[Us] += count_1s_max_15<HasPopCnt>(bb);
}
ei.kingAdjacentZoneAttacksCount[Us] += count_1s_max_15<HasPopCnt>(bb);
}
- // The squares occupied by enemy pieces will be counted two times instead
- // of one. The shift (almost) guarantees that intersection with b is zero
- // so when we 'or' the two bitboards togheter and count we get the correct
- // sum of '1' in b and attacked bitboards.
- Bitboard attacked = Us == WHITE ? ((b & pos.pieces_of_color(Them)) >> 1)
- : ((b & pos.pieces_of_color(Them)) << 1);
-
// Remove squares protected by enemy pawns or occupied by our pieces
b &= ~(ei.attackedBy[Them][PAWN] | pos.pieces_of_color(Us));
// Remove squares protected by enemy pawns or occupied by our pieces
b &= ~(ei.attackedBy[Them][PAWN] | pos.pieces_of_color(Us));
+ // The squares occupied by enemy pieces (not defended by pawns) will be
+ // counted two times instead of one. The shift (almost) guarantees that
+ // intersection with b is zero so when we 'or' the two bitboards togheter
+ // and count we get the correct sum of '1' in b and attacked bitboards.
+ Bitboard attacked = Us == WHITE ? ((b & pos.pieces_of_color(Them)) >> 1)
+ : ((b & pos.pieces_of_color(Them)) << 1);
// Mobility
int mob = (Piece != QUEEN ? count_1s_max_15<HasPopCnt>(b | attacked)
: count_1s<HasPopCnt>(b | attacked));
// Mobility
int mob = (Piece != QUEEN ? count_1s_max_15<HasPopCnt>(b | attacked)
: count_1s<HasPopCnt>(b | attacked));