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Compute also MapB1H1H7[] and MapA1D1D4[]

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This commit is contained in:
Marco Costalba 2016-05-08 14:47:52 +02:00
parent 6f11b0438d
commit 8baa476390
1 changed files with 24 additions and 20 deletions
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44
src/syzygy/tbprobe.cpp
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@ -162,23 +162,6 @@ auto item(DTZPiece& e, int , int ) -> decltype(e)& { return e; }
auto item(WDLPawn& e, int stm, int f) -> decltype(e.file[stm][f])& { return e.file[stm][f]; }
auto item(DTZPawn& e, int , int f) -> decltype(e.file[f])& { return e.file[f]; }
const uint8_t MapA1D1D4[64] = {
6, 0, 1, 2, 0, 0, 0, 0,
0, 7, 3, 4, 0, 0, 0, 0,
0, 0, 8, 5, 0, 0, 0, 0,
0, 0, 0, 9
};
const uint8_t MapB1H1H7[] = {
0, 0, 1, 2, 3, 4, 5, 6,
0, 0, 7, 8, 9, 10, 11, 12,
0, 0, 0, 13, 14, 15, 16, 17,
0, 0, 0, 0, 18, 19, 20, 21,
0, 0, 0, 0, 0, 22, 23, 24,
0, 0, 0, 0, 0, 0, 25, 26,
0, 0, 0, 0, 0, 0, 0, 27
};
const uint8_t Flap[] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 6, 12, 18, 18, 12, 6, 0,
@ -208,7 +191,9 @@ const uint8_t Invflap[] = {
11, 19, 27, 35, 43, 51
};
int KK_idx[10][64];
int MapB1H1H7[SQUARE_NB];
int MapA1D1D4[SQUARE_NB];
int KK_idx[10][SQUARE_NB]; // [MapA1D1D4][SQUARE_NB]
const uint8_t WDL_MAGIC[] = { 0x71, 0xE8, 0x23, 0x5D };
const uint8_t DTZ_MAGIC[] = { 0xD7, 0x66, 0x0C, 0xA5 };
@ -1588,12 +1573,31 @@ void Tablebases::init(const std::string& paths)
}
}
// Compute MapB1H1H7[] that encodes a square below a1-h8 diagonal to 0..27
int code = 0;
for (Square s = SQ_A1; s <= SQ_H8; ++s)
if (off_A1H8(s) < 0)
MapB1H1H7[s] = code++;
// Compute MapA1D1D4[] that encodes a square on the a1-d1-d4 triangle to 0..9
std::vector<Square> diagonal;
code = 0;
for (Square s = SQ_A1; s <= SQ_H8; ++s)
if (off_A1H8(s) < 0 && file_of(s) <= FILE_D && rank_of(s) <= RANK_4)
MapA1D1D4[s] = code++;
else if (!off_A1H8(s) && file_of(s) <= FILE_D)
diagonal.push_back(s);
// Diagonal squares are encoded as last ones
for (auto s : diagonal)
MapA1D1D4[s] = code++;
// Compute KK_idx[] that encodes all the 461 possible legal positions of a couple of
// kings where first king is on a1-d1-d4 triangle. When first king is on the a1-d4
// diagonal, second king is assumed not to be above the a1-h8 diagonal.
int code = 0;
std::vector<std::pair<int, Square>> bothOnDiagonal;
code = 0;
for (int idx = 0; idx < 10; idx++)
for (Square s1 = SQ_A1; s1 <= SQ_H8; ++s1)
if (idx == MapA1D1D4[s1] && (idx || s1 == SQ_B1)) // SQ_B1 is mapped to 0