-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy patheval.cpp
More file actions
161 lines (143 loc) · 6.89 KB
/
eval.cpp
File metadata and controls
161 lines (143 loc) · 6.89 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
#include "eval.h"
#include <cstring>
#include <position.h>
#include <vector>
using namespace chess;
using namespace engine::eval;
namespace engine::eval {
constexpr Value PawnValue = 100, KnightValue = 325, BishopValue = 350,
RookValue = 500, QueenValue = 900;
Value mg_pawn_table[64] = {
0, 0, 0, 0, 0, 0, 0, 0, 98, 134, 61, 95, 68, 126, 34, -11,
-6, 7, 26, 31, 65, 56, 25, -20, -14, 13, 6, 21, 23, 12, 17, -23,
-27, -2, -5, 12, 17, 6, 10, -25, -26, -4, -4, -10, 3, 3, 33, -12,
-35, -1, -20, -23, -15, 24, 38, -22, 0, 0, 0, 0, 0, 0, 0, 0,
};
Value eg_pawn_table[64] = {
0, 0, 0, 0, 0, 0, 0, 0, 178, 173, 158, 134, 147, 132, 165, 187,
94, 100, 85, 67, 56, 53, 82, 84, 32, 24, 13, 5, -2, 4, 17, 17,
13, 9, -3, -7, -7, -8, 3, -1, 4, 7, -6, 1, 0, -5, -1, -8,
13, 8, 8, 10, 13, 0, 2, -7, 0, 0, 0, 0, 0, 0, 0, 0,
};
Value mg_knight_table[64] = {
-167, -89, -34, -49, 61, -97, -15, -107, -73, -41, 72, 36, 23,
62, 7, -17, -47, 60, 37, 65, 84, 129, 73, 44, -9, 17,
19, 53, 37, 69, 18, 22, -13, 4, 16, 13, 28, 19, 21,
-8, -23, -9, 12, 10, 19, 17, 25, -16, -29, -53, -12, -3,
-1, 18, -14, -19, -105, -21, -58, -33, -17, -28, -19, -23,
};
Value eg_knight_table[64] = {
-58, -38, -13, -28, -31, -27, -63, -99, -25, -8, -25, -2, -9,
-25, -24, -52, -24, -20, 10, 9, -1, -9, -19, -41, -17, 3,
22, 22, 22, 11, 8, -18, -18, -6, 16, 25, 16, 17, 4,
-18, -23, -3, -1, 15, 10, -3, -20, -22, -42, -20, -10, -5,
-2, -20, -23, -44, -29, -51, -23, -15, -22, -18, -50, -64,
};
Value mg_bishop_table[64] = {
-29, 4, -82, -37, -25, -42, 7, -8, -26, 16, -18, -13, 30, 59, 18, -47,
-16, 37, 43, 40, 35, 50, 37, -2, -4, 5, 19, 50, 37, 37, 7, -2,
-6, 13, 13, 26, 34, 12, 10, 4, 0, 15, 15, 15, 14, 27, 18, 10,
4, 15, 16, 0, 7, 21, 33, 1, -33, -3, -14, -21, -13, -12, -39, -21,
};
Value eg_bishop_table[64] = {
-14, -21, -11, -8, -7, -9, -17, -24, -8, -4, 7, -12, -3, -13, -4, -14,
2, -8, 0, -1, -2, 6, 0, 4, -3, 9, 12, 9, 14, 10, 3, 2,
-6, 3, 13, 19, 7, 10, -3, -9, -12, -3, 8, 10, 13, 3, -7, -15,
-14, -18, -7, -1, 4, -9, -15, -27, -23, -9, -23, -5, -9, -16, -5, -17,
};
Value mg_rook_table[64] = {
32, 42, 32, 51, 63, 9, 31, 43, 27, 32, 58, 62, 80, 67, 26, 44,
-5, 19, 26, 36, 17, 45, 61, 16, -24, -11, 7, 26, 24, 35, -8, -20,
-36, -26, -12, -1, 9, -7, 6, -23, -45, -25, -16, -17, 3, 0, -5, -33,
-44, -16, -20, -9, -1, 11, -6, -71, -19, -13, 1, 17, 16, 7, -37, -26,
};
Value eg_rook_table[64] = {
13, 10, 18, 15, 12, 12, 8, 5, 11, 13, 13, 11, -3, 3, 8, 3,
7, 7, 7, 5, 4, -3, -5, -3, 4, 3, 13, 1, 2, 1, -1, 2,
3, 5, 8, 4, -5, -6, -8, -11, -4, 0, -5, -1, -7, -12, -8, -16,
-6, -6, 0, 2, -9, -9, -11, -3, -9, 2, 3, -1, -5, -13, 4, -20,
};
Value mg_queen_table[64] = {
-28, 0, 29, 12, 59, 44, 43, 45, -24, -39, -5, 1, -16, 57, 28, 54,
-13, -17, 7, 8, 29, 56, 47, 57, -27, -27, -16, -16, -1, 17, -2, 1,
-9, -26, -9, -10, -2, -4, 3, -3, -14, 2, -11, -2, -5, 2, 14, 5,
-35, -8, 11, 2, 8, 15, -3, 1, -1, -18, -9, 10, -15, -25, -31, -50,
};
Value eg_queen_table[64] = {
-9, 22, 22, 27, 27, 19, 10, 20, -17, 20, 32, 41, 58,
25, 30, 0, -20, 6, 9, 49, 47, 35, 19, 9, 3, 22,
24, 45, 57, 40, 57, 36, -18, 28, 19, 47, 31, 34, 39,
23, -16, -27, 15, 6, 9, 17, 10, 5, -22, -23, -30, -16,
-16, -23, -36, -32, -33, -28, -22, -43, -5, -32, -20, -41,
};
Value mg_king_table[64] = {
-65, 23, 16, -15, -56, -34, 2, 13, 29, -1, -20, -7, -8,
-4, -38, -29, -9, 24, 2, -16, -20, 6, 22, -22, -17, -20,
-12, -27, -30, -25, -14, -36, -49, -1, -27, -39, -46, -44, -33,
-51, -14, -14, -22, -46, -44, -30, -15, -27, 1, 7, -8, -64,
-43, -16, 9, 8, -15, 36, 12, -54, 8, -28, 24, 14,
};
Value eg_king_table[64] = {-74, -35, -18, -18, -11, 15, 4, -17, -12, 17, 14,
17, 17, 38, 23, 11, 10, 17, 23, 15, 20, 45,
44, 13, -8, 22, 24, 27, 26, 33, 26, 3, -18,
-4, 21, 24, 27, 23, 9, -11, -19, -3, 11, 21,
23, 16, 7, -9, -27, -11, 4, 13, 14, 4, -5,
-17, -53, -34, -21, -11, -28, -14, -24, -43};
Value *mg_pesto_table[] = {
{0}, mg_pawn_table, mg_knight_table, mg_bishop_table,
mg_rook_table, mg_queen_table, mg_king_table};
Value *eg_pesto_table[] = {
{0}, eg_pawn_table, eg_knight_table, eg_bishop_table,
eg_rook_table, eg_queen_table, eg_king_table};
Value eval(const chess::Board &board) {
int pieceCount[10] = {
board.count<PAWN, WHITE>(), board.count<KNIGHT, WHITE>(),
board.count<BISHOP, WHITE>(), board.count<ROOK, WHITE>(),
board.count<QUEEN, WHITE>(), board.count<PAWN, BLACK>(),
board.count<KNIGHT, BLACK>(), board.count<BISHOP, BLACK>(),
board.count<ROOK, BLACK>(), board.count<QUEEN, BLACK>(),
};
Value material = (pieceCount[0] * PawnValue + pieceCount[1] * KnightValue +
pieceCount[2] * BishopValue + pieceCount[3] * RookValue +
pieceCount[4] * QueenValue) -
(pieceCount[5] * PawnValue + pieceCount[6] * KnightValue +
pieceCount[7] * BishopValue + pieceCount[8] * RookValue +
pieceCount[9] * QueenValue);
constexpr int KnightPhase = 1;
constexpr int BishopPhase = 1;
constexpr int RookPhase = 2;
constexpr int QueenPhase = 4;
constexpr int TotalPhase =
KnightPhase * 4 + BishopPhase * 4 + RookPhase * 4 + QueenPhase * 2;
int phase = (pieceCount[1] + pieceCount[6]) * KnightPhase +
(pieceCount[2] + pieceCount[7]) * BishopPhase +
(pieceCount[3] + pieceCount[8]) * RookPhase +
(pieceCount[4] + pieceCount[9]) * QueenPhase;
phase = (phase * 256 + TotalPhase / 2) / TotalPhase;
const int sign = board.sideToMove() == chess::Color::WHITE ? 1 : -1;
int mgScore = material;
int egScore = material;
{
Bitboard occ = board.occ();
while (occ) {
Square i = (Square)pop_lsb(occ);
auto p = board.at(i);
int _sign = 1;
if (color_of(p) == BLACK) {
_sign = -1;
i = square_mirror(i);
}
mgScore += _sign * mg_pesto_table[piece_of(p)][i];
egScore += _sign * eg_pesto_table[piece_of(p)][i];
}
}
Value finalScore =
((mgScore * phase) + (egScore * (256 - phase))) / 256 * sign;
return finalScore;
}
Value piece_value(PieceType pt) {
Value pieces[] = {0, PawnValue, KnightValue,
BishopValue, RookValue, QueenValue};
return pieces[pt];
}
} // namespace engine::eval