stellar

0 #ifndef STELLAR_SCORE_H

1 #define STELLAR_SCORE_H

2

3 #define MAX_PLY 64

4

5 #define SCORE_INFINITY 32000

6 #define MATE_VALUE 31000

7 #define MATE_SCORE 30000

8

9 namespace score {

10

11 inline constexpr const uint16_t value[6] = {100, 300, 350, 500, 1000, 10000};

12 inline constexpr const uint16_t capture[6][6] = {

13 // clang-format off

14 {105, 205, 305, 405, 505, 605},

15 {104, 204, 304, 404, 504, 604},

16 {103, 203, 303, 403, 503, 603},

17 {102, 202, 302, 402, 502, 602},

18 {101, 201, 301, 401, 501, 601},

19 {100, 200, 300, 400, 500, 600},

20 // clang-format on

21 };

22

23 inline constexpr const int8_t position[6][64] = {

24 // clang-format off

25 {

26 0, 0, 0, 0, 0, 0, 0, 0,

27 0, 0, 0, -10, -10, 0, 0, 0,

28 0, 0, 0, 5, 5, 0, 0, 0,

29 5, 5, 10, 20, 20, 5, 5, 5,

30 10, 10, 10, 20, 20, 10, 10, 10,

31 20, 20, 20, 30, 30, 30, 20, 20,

32 30, 30, 30, 40, 40, 30, 30, 30,

33 90, 90, 90, 90, 90, 90, 90, 90

34 }, {

35 -5, -10 , 0, 0, 0, 0, -10, -5,

36 -5, 0, 0, 0, 0, 0, 0, -5,

37 -5, 5, 20, 10, 10, 20, 5, -5,

38 -5, 10, 20, 30, 30, 20, 10, -5,

39 -5, 10, 20, 30, 30, 20, 10, -5,

40 -5, 5, 20, 20, 20, 20, 5, -5,

41 -5, 0, 0, 10, 10, 0, 0, -5,

42 -5, 0, 0, 0, 0, 0, 0, -5

43 }, {

44 0, 0, -10, 0, 0, -10, 0, 0,

45 0, 30, 0, 0, 0, 0, 30, 0,

46 0, 10, 0, 0, 0, 0, 10, 0,

47 0, 0, 10, 20, 20, 10, 0, 0,

48 0, 0, 10, 20, 20, 10, 0, 0,

49 0, 0, 0, 10, 10, 0, 0, 0,

50 0, 0, 0, 0, 0, 0, 0, 0,

51 0, 0, 0, 0, 0, 0, 0, 0

52 }, {

53 0, 0, 0, 20, 20, 0, 0, 0,

54 0, 0, 10, 20, 20, 10, 0, 0,

55 0, 0, 10, 20, 20, 10, 0, 0,

56 0, 0, 10, 20, 20, 10, 0, 0,

57 0, 0, 10, 20, 20, 10, 0, 0,

58 0, 0, 10, 20, 20, 10, 0, 0,

59 50, 50, 50, 50, 50, 50, 50, 50,

60 50, 50, 50, 50, 50, 50, 50, 50

61 }, {

62 0, 0, 0, 0, 0, 0, 0, 0,

63 0, 0, 0, 0, 0, 0, 0, 0,

64 0, 0, 0, 0, 0, 0, 0, 0,

65 0, 0, 0, 0, 0, 0, 0, 0,

66 0, 0, 0, 0, 0, 0, 0, 0,

67 0, 0, 0, 0, 0, 0, 0, 0,

68 0, 0, 0, 0, 0, 0, 0, 0,

69 0, 0, 0, 0, 0, 0, 0, 0

70 }, {

71 0, 0, 5, 0, -15, 0, 10, 0,

72 0, 5, 5, -5, -5, 0, 5, 0,

73 0, 0, 5, 10, 10, 5, 0, 0,

74 0, 5, 10, 20, 20, 10, 5, 0,

75 0, 5, 10, 20, 20, 10, 5, 0,

76 0, 5, 5, 10, 10, 5, 5, 0,

77 0, 0, 5, 5, 5, 5, 0, 0,

78 0, 0, 0, 0, 0, 0, 0, 0

79 },

80 // clang-format on

81 };

82

83 inline constexpr uint16_t get(const piece::Type piece) { return value[to_underlying(piece)]; }

84 inline constexpr uint16_t get(const piece::Type piece, const piece::Type captured) {

85 return capture[to_underlying(piece)][to_underlying(captured)];

86 }

87

88 inline constexpr int8_t get(const piece::Type type, const color::Color color, const square::Square square) {

89 uint8_t square_i = to_underlying(color == color::WHITE ? square : square::mirror(square));

90 return position[to_underlying(type)][square_i];

91 }

92

93 inline constexpr const uint8_t pawn_double = 10;

94 inline constexpr const uint8_t pawn_isolated = 10;

95 inline constexpr const std::array<std::array<int16_t, 8>, 2> pawn_passed = {

96 {{0, 10, 30, 50, 75, 100, 150, 200}, {200, 150, 100, 75, 50, 30, 10, 0}}};

97

98 inline constexpr const uint8_t score_open_semi = 10;

99 inline constexpr const uint8_t score_open = 15;

100

101 } // namespace score

102

103 #endif