stellarUCI Chess engine written in C++20 |
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score.hpp (6899B)
0 #ifndef STELLAR_SCORE_H
1 #define STELLAR_SCORE_H
3 #include "utils.hpp"
4 #define MAX_PLY 64
6 #define SCORE_INFINITY 32000
7 #define MATE_VALUE 31000
8 #define MATE_SCORE 30000
10 namespace score {
12 inline constexpr const uint16_t value[2][6] = {
13 {82, 337, 365, 477, 1025, 12000},
14 {94, 201, 297, 512, 936, 12000},
15 };
17 inline constexpr const int16_t position[2][6][64] = {
18 // clang-format off
19 {
20 {
21 0, 0, 0, 0, 0, 0, 0, 0,
22 -35, -1, -20, -23, -15, 24, 38, -22,
23 -26, -4, -4, -10, 3, 3, 33, -12,
24 -27, -2, -5, 12, 17, 6, 10, -25,
25 -14, 13, 6, 21, 23, 12, 17, -23,
26 -6, 7, 26, 31, 65, 56, 25, -20,
27 98, 134, 61, 95, 68, 126, 34, -11,
28 0, 0, 0, 0, 0, 0, 0, 0,
29 }, {
30 -105, -21, -58, -33, -17, -28, -19, -23,
31 -29, -53, -12, -3, -1, 18, -14, -19,
32 -23, -9, 12, 10, 19, 17, 25, -16,
33 -13, 4, 16, 13, 28, 19, 21, -8,
34 -9, 17, 19, 53, 37, 69, 18, 22,
35 -47, 60, 37, 65, 84, 129, 73, 44,
36 -73, -41, 72, 36, 23, 62, 7, -17,
37 -167, -89, -34, -49, 61, -97, -15, -107,
38 }, {
39 -33, -3, -14, -21, -13, -12, -39, -21,
40 4, 15, 16, 0, 7, 21, 33, 1,
41 0, 15, 15, 15, 14, 27, 18, 10,
42 -6, 13, 13, 26, 34, 12, 10, 4,
43 -4, 5, 19, 50, 37, 37, 7, -2,
44 -16, 37, 43, 40, 35, 50, 37, -2,
45 -26, 16, -18, -13, 30, 59, 18, -47,
46 -29, 4, -82, -37, -25, -42, 7, -8,
47 }, {
48 -19, -13, 1, 17, 16, 7, -37, -26,
49 -44, -16, -20, -9, -1, 11, -6, -71,
50 -45, -25, -16, -17, 3, 0, -5, -33,
51 -36, -26, -12, -1, 9, -7, 6, -23,
52 -24, -11, 7, 26, 24, 35, -8, -20,
53 -5, 19, 26, 36, 17, 45, 61, 16,
54 27, 32, 58, 62, 80, 67, 26, 44,
55 32, 42, 32, 51, 63, 9, 31, 43,
56 }, {
57 -1, -18, -9, 10, -15, -25, -31, -50,
58 -35, -8, 11, 2, 8, 15, -3, 1,
59 -14, 2, -11, -2, -5, 2, 14, 5,
60 -9, -26, -9, -10, -2, -4, 3, -3,
61 -27, -27, -16, -16, -1, 17, -2, 1,
62 -13, -17, 7, 8, 29, 56, 47, 57,
63 -24, -39, -5, 1, -16, 57, 28, 54,
64 -28, 0, 29, 12, 59, 44, 43, 45,
65 }, {
66 -15, 36, 12, -54, 8, -28, 24, 14,
67 1, 7, -8, -64, -43, -16, 9, 8,
68 -14, -14, -22, -46, -44, -30, -15, -27,
69 -49, -1, -27, -39, -46, -44, -33, -51,
70 -17, -20, -12, -27, -30, -25, -14, -36,
71 -9, 24, 2, -16, -20, 6, 22, -22,
72 29, -1, -20, -7, -8, -4, -38, -29,
73 -65, 23, 16, -15, -56, -34, 2, 13,
74 }
75 }, {
76 {
77 0, 0, 0, 0, 0, 0, 0, 0,
78 13, 8, 8, 10, 13, 0, 2, -7,
79 4, 7, -6, 1, 0, -5, -1, -8,
80 13, 9, -3, -7, -7, -8, 3, -1,
81 32, 24, 13, 5, -2, 4, 17, 17,
82 94, 100, 85, 67, 56, 53, 82, 84,
83 178, 173, 158, 134, 147, 132, 165, 187,
84 0, 0, 0, 0, 0, 0, 0, 0,
85 }, {
86 -29, -51, -23, -15, -22, -18, -50, -64,
87 -42, -20, -10, -5, -2, -20, -23, -44,
88 -23, -3, -1, 15, 10, -3, -20, -22,
89 -18, -6, 16, 25, 16, 17, 4, -18,
90 -17, 3, 22, 22, 22, 11, 8, -18,
91 -24, -20, 10, 9, -1, -9, -19, -41,
92 -25, -8, -25, -2, -9, -25, -24, -52,
93 -58, -38, -13, -28, -31, -27, -63, -99,
94 }, {
95 -23, -9, -23, -5, -9, -16, -5, -17,
96 -14, -18, -7, -1, 4, -9, -15, -27,
97 -12, -3, 8, 10, 13, 3, -7, -15,
98 -6, 3, 13, 19, 7, 10, -3, -9,
99 -3, 9, 12, 9, 14, 10, 3, 2,
100 2, -8, 0, -1, -2, 6, 0, 4,
101 -8, -4, 7, -12, -3, -13, -4, -14,
102 -14, -21, -11, -8, -7, -9, -17, -24,
103 }, {
104 -9, 2, 3, -1, -5, -13, 4, -20,
105 -6, -6, 0, 2, -9, -9, -11, -3,
106 -4, 0, -5, -1, -7, -12, -8, -16,
107 3, 5, 8, 4, -5, -6, -8, -11,
108 4, 3, 13, 1, 2, 1, -1, 2,
109 7, 7, 7, 5, 4, -3, -5, -3,
110 11, 13, 13, 11, -3, 3, 8, 3,
111 13, 10, 18, 15, 12, 12, 8, 5,
112 }, {
113 -33, -28, -22, -43, -5, -32, -20, -41,
114 -22, -23, -30, -16, -16, -23, -36, -32,
115 -16, -27, 15, 6, 9, 17, 10, 5,
116 -18, 28, 19, 47, 31, 34, 39, 23,
117 3, 22, 24, 45, 57, 40, 57, 36,
118 -20, 6, 9, 49, 47, 35, 19, 9,
119 -17, 20, 32, 41, 58, 25, 30, 0,
120 -9, 22, 22, 27, 27, 19, 10, 20,
121 }, {
122 -53, -34, -21, -11, -28, -14, -24, -43,
123 -27, -11, 4, 13, 14, 4, -5, -17,
124 -19, -3, 11, 21, 23, 16, 7, -9,
125 -18, -4, 21, 24, 27, 23, 9, -11,
126 -8, 22, 24, 27, 26, 33, 26, 3,
127 10, 17, 23, 15, 20, 45, 44, 13,
128 -12, 17, 14, 17, 17, 38, 23, 11,
129 -74, -35, -18, -18, -11, 15, 4, -17,
130 }
131 }
132 // clang-format on
133 };
135 inline constexpr const uint16_t phase_opening = 6192;
136 inline constexpr const uint16_t phase_endgame = 518;
138 inline constexpr int16_t interpolate(int16_t phase_score, int16_t opening, int16_t endgame) {
139 return (opening * phase_score + endgame * (phase_opening - phase_score)) / phase_opening;
140 }
142 enum Phase {
143 OPENING,
144 ENDGAME,
145 };
147 inline constexpr int16_t get(const piece::Type piece, const Phase phase = OPENING) {
148 return value[to_underlying(phase)][to_underlying(piece)];
149 }
151 inline constexpr int16_t get(const piece::Type piece, const color::Color color, const square::Square square,
152 const Phase phase = ENDGAME) {
153 uint8_t square_i = to_underlying(color == color::WHITE ? square : square::mirror(square));
154 return position[to_underlying(phase)][to_underlying(piece)][square_i];
155 }
157 inline constexpr const uint8_t pawn_double_opening = 5;
158 inline constexpr const uint8_t pawn_double_endgame = 10;
159 inline constexpr const uint8_t pawn_isolated_opening = 5;
160 inline constexpr const uint8_t pawn_isolated_endgame = 10;
162 inline constexpr const std::array<std::array<int16_t, 8>, 2> pawn_passed = {
163 {{0, 10, 30, 50, 75, 100, 150, 200}, {200, 150, 100, 75, 50, 30, 10, 0}}};
165 inline constexpr const uint8_t file_open_semi = 10;
166 inline constexpr const uint8_t file_open = 15;
168 } // namespace score
170 #endif