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Move storm special condition to UnblockedStorm array (#2210)

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This is a functional simplification.

Looks like we can accommodate the special initialization of Value in evaluate_shelter in the UnblockedStorm array.

STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 32483 W: 7422 L: 7322 D: 17739
http://tests.stockfishchess.org/tests/view/5d14c5f80ebc5925cf0b48da

LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 35361 W: 6139 L: 6042 D: 23180
http://tests.stockfishchess.org/tests/view/5d14d69c0ebc5925cf0b4bd0

Bench 3596270
This commit is contained in:
protonspring 2019-06-30 07:22:37 -06:00 • committed by Marco Costalba
parent c9d73d1aa5
commit 79d06d8840
1 changed files with 6 additions and 9 deletions
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15
src/pawns.cpp
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@ -53,11 +53,12 @@ namespace {
// Danger of enemy pawns moving toward our king by [distance from edge][rank].
// RANK_1 = 0 is used for files where the enemy has no pawn, or their pawn
// is behind our king.
// [0][1-2] accommodate opponent pawn on edge (likely blocked by our king)
constexpr Value UnblockedStorm[int(FILE_NB) / 2][RANK_NB] = {
{ V( 89), V(107), V(123), V(93), V(57), V( 45), V( 51) },
{ V( 44), V(-18), V(123), V(46), V(39), V( -7), V( 23) },
{ V( 4), V( 52), V(162), V(37), V( 7), V(-14), V( -2) },
{ V(-10), V(-14), V( 90), V(15), V( 2), V( -7), V(-16) }
{ V( 89), V(-285), V(-185), V(93), V(57), V( 45), V( 51) },
{ V( 44), V( -18), V( 123), V(46), V(39), V( -7), V( 23) },
{ V( 4), V( 52), V( 162), V(37), V( 7), V(-14), V( -2) },
{ V(-10), V( -14), V( 90), V(15), V( 2), V( -7), V(-16) }
};
#undef S
@ -181,16 +182,12 @@ template<Color Us>
void Entry::evaluate_shelter(const Position& pos, Square ksq, Score& shelter) {
constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
constexpr Direction Down = (Us == WHITE ? SOUTH : NORTH);
constexpr Bitboard BlockSquares = (Rank1BB | Rank2BB | Rank7BB | Rank8BB)
& (FileABB | FileHBB);
Bitboard b = pos.pieces(PAWN) & ~forward_ranks_bb(Them, ksq);
Bitboard ourPawns = b & pos.pieces(Us);
Bitboard theirPawns = b & pos.pieces(Them);
Value bonus[] = { (shift<Down>(theirPawns) & BlockSquares & ksq) ? Value(374) : Value(5),
VALUE_ZERO };
Value bonus[] = { Value(5), Value(5) };
File center = clamp(file_of(ksq), FILE_B, FILE_G);
for (File f = File(center - 1); f <= File(center + 1); ++f)