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bench: 8069601
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Marco Costalba 2015-02-26 20:49:41 +01:00
commit 2dbb1adf2a
1 changed files with 14 additions and 12 deletions
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18
src/pawns.cpp
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@ -50,8 +50,8 @@ namespace {
{ S(20, 28), S(29, 31), S(33, 31), S(33, 31),
S(33, 31), S(33, 31), S(29, 31), S(20, 28) } };
// Connected pawn bonus by opposed, phalanx flags and rank
Score Connected[2][2][RANK_NB];
// Connected pawn bonus by opposed, phalanx, twice supported and rank
Score Connected[2][2][2][RANK_NB];
// Levers bonus by rank
const Score Lever[RANK_NB] = {
@ -110,9 +110,9 @@ namespace {
const Square Right = (Us == WHITE ? DELTA_NE : DELTA_SW);
const Square Left = (Us == WHITE ? DELTA_NW : DELTA_SE);
Bitboard b, p, doubled, connected;
Bitboard b, p, doubled, connected, supported;
Square s;
bool passed, isolated, opposed, phalanx, backward, unsupported, lever;
bool passed, isolated, opposed, phalanx, backward, lever;
Score score = SCORE_ZERO;
const Square* pl = pos.list<PAWN>(Us);
const Bitboard* pawnAttacksBB = StepAttacksBB[make_piece(Us, PAWN)];
@ -143,7 +143,7 @@ namespace {
// Flag the pawn
connected = ourPawns & adjacent_files_bb(f) & (rank_bb(s) | p);
phalanx = connected & rank_bb(s);
unsupported = !(connected & p);
supported = connected & p;
isolated = !(ourPawns & adjacent_files_bb(f));
doubled = ourPawns & forward_bb(Us, s);
opposed = theirPawns & forward_bb(Us, s);
@ -183,7 +183,7 @@ namespace {
if (isolated)
score -= Isolated[opposed][f];
if (unsupported && !isolated)
if (!supported && !isolated)
score -= UnsupportedPawnPenalty;
if (doubled)
@ -193,7 +193,7 @@ namespace {
score -= Backward[opposed][f];
if (connected)
score += Connected[opposed][phalanx][relative_rank(Us, s)];
score += Connected[opposed][phalanx][more_than_one(supported)][relative_rank(Us, s)];
if (lever)
score += Lever[relative_rank(Us, s)];
@ -223,10 +223,12 @@ void init()
for (int opposed = 0; opposed <= 1; ++opposed)
for (int phalanx = 0; phalanx <= 1; ++phalanx)
for (int apex = 0; apex <= 1; ++apex)
for (Rank r = RANK_2; r < RANK_8; ++r)
{
int v = (Seed[r] + (phalanx ? (Seed[r + 1] - Seed[r]) / 2 : 0)) >> opposed;
Connected[opposed][phalanx][r] = make_score( 3 * v / 2, v);
v += (apex ? v / 2 : 0);
Connected[opposed][phalanx][apex][r] = make_score(3 * v / 2, v);
}
}