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Cleanup pawn storm code

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In this form it is even more evident we have some
issue there to be fixed sooner then later....

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-04-02 11:48:12 +02:00
parent 08634b06a3
commit 2ed3358faf
1 changed files with 16 additions and 26 deletions
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42
src/pawns.cpp
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@ -226,21 +226,16 @@ Score PawnInfoTable::evaluate_pawns(const Position& pos, Bitboard ourPawns,
Bitboard b = outpost_mask(Us, s) & theirPawns & (FileFBB | FileGBB | FileHBB);
while (b)
{
// Give a bonus according to the distance of the nearest enemy pawn
Square s2 = pop_1st_bit(&b);
int v = StormLeverBonus[f] - 2 * square_distance(s, s2);
// If enemy pawn has no pawn beside itself is particularly vulnerable.
// Big bonus, especially against a weakness on the rook file
if (!(theirPawns & neighboring_files_bb(s2) & rank_bb(s2)))
{
// The enemy pawn has no pawn beside itself, which makes it
// particularly vulnerable. Big bonus, especially against a
// weakness on the rook file.
if (square_file(s2) == FILE_H)
bonus += 4*StormLeverBonus[f] - 8*square_distance(s, s2);
else
bonus += 2*StormLeverBonus[f] - 4*square_distance(s, s2);
} else
// There is at least one enemy pawn beside the enemy pawn we look
// at, which means that the pawn has somewhat better chances of
// defending itself by advancing. Smaller bonus.
bonus += StormLeverBonus[f] - 2*square_distance(s, s2);
v *= (square_file(s2) == FILE_H ? 4 : 2);
bonus += v;
}
}
pi->ksStormValue[Us] += bonus;
@ -252,21 +247,16 @@ Score PawnInfoTable::evaluate_pawns(const Position& pos, Bitboard ourPawns,
Bitboard b = outpost_mask(Us, s) & theirPawns & (FileABB | FileBBB | FileCBB);
while (b)
{
// Give a bonus according to the distance of the nearest enemy pawn
Square s2 = pop_1st_bit(&b);
int v = StormLeverBonus[f] - 4 * square_distance(s, s2);
// If enemy pawn has no pawn beside itself is particularly vulnerable.
// Big bonus, especially against a weakness on the rook file
if (!(theirPawns & neighboring_files_bb(s2) & rank_bb(s2)))
{
// The enemy pawn has no pawn beside itself, which makes it
// particularly vulnerable. Big bonus, especially against a
// weakness on the rook file.
if (square_file(s2) == FILE_A)
bonus += 4*StormLeverBonus[f] - 16*square_distance(s, s2);
else
bonus += 2*StormLeverBonus[f] - 8*square_distance(s, s2);
} else
// There is at least one enemy pawn beside the enemy pawn we look
// at, which means that the pawn has somewhat better chances of
// defending itself by advancing. Smaller bonus.
bonus += StormLeverBonus[f] - 4*square_distance(s, s2);
v *= (square_file(s2) == FILE_A ? 4 : 2);
bonus += v;
}
}
pi->qsStormValue[Us] += bonus;