forked from MoonstoneLight/Fizbo-Chess
-
Notifications
You must be signed in to change notification settings - Fork 0
/
pawn.cpp
247 lines (221 loc) · 22.4 KB
/
pawn.cpp
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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
// pawn scores
#include "chess.h"
#include <intrin.h>
#include "coeffs.h"
UINT64* ph; // pawn hash table
const UINT64 passed_mask[64]={// applied to opposite color. To get passed pawns - forward, current and adjacent files. Zero out ranks 1, 7 and 8 - they never come into play.
0,0x0000000000003F3F,0x0000000000001F1F,0x0000000000000F0F,0x0000000000000707,0x0000000000000303,0,0,
0,0x00000000003F3F3F,0x00000000001F1F1F,0x00000000000F0F0F,0x0000000000070707,0x0000000000030303,0,0,
0,0x000000003F3F3F00,0x000000001F1F1F00,0x000000000F0F0F00,0x0000000007070700,0x0000000003030300,0,0,
0,0x0000003F3F3F0000,0x0000001F1F1F0000,0x0000000F0F0F0000,0x0000000707070000,0x0000000303030000,0,0,
0,0x00003F3F3F000000,0x00001F1F1F000000,0x00000F0F0F000000,0x0000070707000000,0x0000030303000000,0,0,
0,0x003F3F3F00000000,0x001F1F1F00000000,0x000F0F0F00000000,0x0007070700000000,0x0003030300000000,0,0,
0,0x3F3F3F0000000000,0x1F1F1F0000000000,0x0F0F0F0000000000,0x0707070000000000,0x0303030000000000,0,0,
0,0x3F3F000000000000,0x1F1F000000000000,0x0F0F000000000000,0x0707000000000000,0x0303000000000000,0,0};
const UINT64 blocked_mask[64]={// applied to the same color. To see if passed pawn is blocked my other player's pawn(s). Current file only.
0x00000000000000fe,0x00000000000000fc,0x00000000000000f8,0x00000000000000f0,0x00000000000000e0,0x00000000000000c0,0x0000000000000080,0,
0x000000000000fe00,0x000000000000fc00,0x000000000000f800,0x000000000000f000,0x000000000000e000,0x000000000000c000,0x0000000000008000,0,
0x0000000000fe0000,0x0000000000fc0000,0x0000000000f80000,0x0000000000f00000,0x0000000000e00000,0x0000000000c00000,0x0000000000800000,0,
0x00000000fe000000,0x00000000fc000000,0x00000000f8000000,0x00000000f0000000,0x00000000e0000000,0x00000000c0000000,0x0000000080000000,0,
0x000000fe00000000,0x000000fc00000000,0x000000f800000000,0x000000f000000000,0x000000e000000000,0x000000c000000000,0x0000008000000000,0,
0x0000fe0000000000,0x0000fc0000000000,0x0000f80000000000,0x0000f00000000000,0x0000e00000000000,0x0000c00000000000,0x0000800000000000,0,
0x00fe000000000000,0x00fc000000000000,0x00f8000000000000,0x00f0000000000000,0x00e0000000000000,0x00c0000000000000,0x0080000000000000,0,
0xfe00000000000000,0xfc00000000000000,0xf800000000000000,0xf000000000000000,0xe000000000000000,0xc000000000000000,0x8000000000000000,0};
static const UINT64 halfopen_mask[64]={// applied to opposite color. To get pawns on half-open file (used for candidate passed). Current file only.
0x000000000000007f,0x000000000000003f,0x000000000000001f,0x000000000000000f,0x0000000000000007,0x0000000000000003,0x0000000000000001,0,
0x0000000000007f00,0x0000000000003f00,0x0000000000001f00,0x0000000000000f00,0x0000000000000700,0x0000000000000300,0x0000000000000100,0,
0x00000000007f0000,0x00000000003f0000,0x00000000001f0000,0x00000000000f0000,0x0000000000070000,0x0000000000030000,0x0000000000010000,0,
0x000000007f000000,0x000000003f000000,0x000000001f000000,0x000000000f000000,0x0000000007000000,0x0000000003000000,0x0000000001000000,0,
0x0000007f00000000,0x0000003f00000000,0x0000001f00000000,0x0000000f00000000,0x0000000700000000,0x0000000300000000,0x0000000100000000,0,
0x00007f0000000000,0x00003f0000000000,0x00001f0000000000,0x00000f0000000000,0x0000070000000000,0x0000030000000000,0x0000010000000000,0,
0x007f000000000000,0x003f000000000000,0x001f000000000000,0x000f000000000000,0x0007000000000000,0x0003000000000000,0x0001000000000000,0,
0x7f00000000000000,0x3f00000000000000,0x1f00000000000000,0x0f00000000000000,0x0700000000000000,0x0300000000000000,0x0100000000000000,0};
static const UINT64 protected_mask[66]={// applied to the same color. To see if current pawn is protected. Need 2 trailing zeros.
0x0000000000000000,0x0000000000000100,0x0000000000000200,0x0000000000000400,0x0000000000000800,0x0000000000001000,0x0000000000002000,0x0000000000004000,
0x0000000000000000,0x0000000000010001,0x0000000000020002,0x0000000000040004,0x0000000000080008,0x0000000000100010,0x0000000000200020,0x0000000000400040,
0x0000000000000000,0x0000000001000100,0x0000000002000200,0x0000000004000400,0x0000000008000800,0x0000000010001000,0x0000000020002000,0x0000000040004000,
0x0000000000000000,0x0000000100010000,0x0000000200020000,0x0000000400040000,0x0000000800080000,0x0000001000100000,0x0000002000200000,0x0000004000400000,
0x0000000000000000,0x0000010001000000,0x0000020002000000,0x0000040004000000,0x0000080008000000,0x0000100010000000,0x0000200020000000,0x0000400040000000,
0x0000000000000000,0x0001000100000000,0x0002000200000000,0x0004000400000000,0x0008000800000000,0x0010001000000000,0x0020002000000000,0x0040004000000000,
0x0000000000000000,0x0100010000000000,0x0200020000000000,0x0400040000000000,0x0800080000000000,0x1000100000000000,0x2000200000000000,0x4000400000000000,
0x0000000000000000,0x0001000000000000,0x0002000000000000,0x0004000000000000,0x0008000000000000,0x0010000000000000,0x0020000000000000,0x0040000000000000,0,0};
static const UINT64 forward_protected_mask[64]={// applied to the same color. To see if current pawn and all its forward positions are protected.
0x000000000000ff00,0x000000000000ff00,0x000000000000fe00,0x000000000000fc00,0x000000000000f800,0x000000000000f000,0x000000000000e000,0x000000000000c000,
0x0000000000ff00ff,0x0000000000ff00ff,0x0000000000fe00fe,0x0000000000fc00fc,0x0000000000f800f8,0x0000000000f000f0,0x0000000000e000e0,0x0000000000c000c0,
0x00000000ff00ff00,0x00000000ff00ff00,0x00000000fe00fe00,0x00000000fc00fc00,0x00000000f800f800,0x00000000f000f000,0x00000000e000e000,0x00000000c000c000,
0x000000ff00ff0000,0x000000ff00ff0000,0x000000fe00fe0000,0x000000fc00fc0000,0x000000f800f80000,0x000000f000f00000,0x000000e000e00000,0x000000c000c00000,
0x0000ff00ff000000,0x0000ff00ff000000,0x0000fe00fe000000,0x0000fc00fc000000,0x0000f800f8000000,0x0000f000f0000000,0x0000e000e0000000,0x0000c000c0000000,
0x00ff00ff00000000,0x00ff00ff00000000,0x00fe00fe00000000,0x00fc00fc00000000,0x00f800f800000000,0x00f000f000000000,0x00e000e000000000,0x00c000c000000000,
0xff00ff0000000000,0xff00ff0000000000,0xfe00fe0000000000,0xfc00fc0000000000,0xf800f80000000000,0xf000f00000000000,0xe000e00000000000,0xc000c00000000000,
0x00ff000000000000,0x00ff000000000000,0x00fe000000000000,0x00fc000000000000,0x00f8000000000000,0x00f0000000000000,0x00e0000000000000,0x00c0000000000000};
static const UINT64 is_mask[8]={0xff00,0xff00ff,0xff00ff00,0xff00ff0000,0xff00ff000000,0xff00ff00000000,0xff00ff0000000000,0xff000000000000};// isolated pawn mask for files 1-8
// takes bit*64+bit2, returns index 0-575.
unsigned short int index_pawn[]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,0,0,5,6,7,8,9,10,0,0,11,12,13,14,15,16,0,0,17,18,19,20,21,22,0,0,23,24,25,26,27,28,0,0,29,30,31,32,33,34,0,0,35,36,37,38,39,40,0,0,41,42,43,44,45,46,0,0,0,0,47,48,49,50,0,0,51,52,53,54,55,56,0,0,57,58,59,60,61,62,0,0,63,64,65,66,67,68,0,0,69,70,71,72,73,74,0,0,75,76,77,78,79,80,0,0,81,82,83,84,85,86,0,0,42,87,88,89,90,91,0,0,0,0,0,92,93,94,0,
0,95,96,97,98,99,100,0,0,101,102,103,104,105,106,0,0,107,108,109,110,111,112,0,0,113,114,115,116,117,118,0,0,119,120,121,122,123,124,0,0,125,126,127,128,129,130,0,0,43,88,131,132,133,134,0,0,0,0,0,0,135,136,0,0,137,138,139,140,141,142,0,0,143,144,145,146,147,148,0,0,149,150,151,152,153,154,0,0,155,156,157,158,159,160,0,0,161,162,163,164,165,166,0,0,167,168,169,170,171,172,0,0,44,89,132,173,174,175,0,0,0,0,0,0,0,176,0,0,177,178,179,180,181,182,0,0,183,184,185,186,187,188,0,0,189,190,191,192,193,194,0,0,195,196,197,198,199,200,0,0,201,202,203,204,205,206,0,0,207,208,209,210,211,212,0,0,45,90,133,174,213,214,0,0,0,0,0,0,0,0,0,0,215,216,217,218,219,220,0,
0,221,222,223,224,225,226,0,0,227,228,229,230,231,232,0,0,233,234,235,236,237,238,0,0,239,240,241,242,243,244,0,0,245,246,247,248,249,250,0,0,46,91,134,175,214,251,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,252,253,254,255,256,0,0,257,258,259,260,261,262,0,
0,263,264,265,266,267,268,0,0,269,270,271,272,273,274,0,0,275,276,277,278,279,280,0,0,281,282,283,284,285,286,0,0,35,81,125,167,207,245,0,0,0,0,0,0,0,0,0,0,0,0,287,288,289,290,0,0,291,292,293,294,295,296,0,0,297,298,299,300,301,302,0,0,303,304,305,306,307,308,0,0,309,310,311,312,313,314,0,0,282,315,316,317,318,319,0,0,36,82,126,168,208,246,0,0,0,0,0,0,0,0,0,0,0,0,0,320,321,322,0,0,323,324,325,326,327,328,0,0,329,330,331,332,333,334,0,0,335,336,337,338,339,340,0,0,341,342,343,344,345,346,0,0,283,316,347,348,349,350,0,0,37,83,127,169,209,247,0,0,0,0,0,0,0,0,0,0,0,0,0,0,351,352,0,0,353,354,355,356,357,358,0,0,359,360,361,362,363,364,0,
0,365,366,367,368,369,370,0,0,371,372,373,374,375,376,0,0,284,317,348,377,378,379,0,0,38,84,128,170,210,248,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,380,0,0,381,382,383,384,385,386,0,0,387,388,389,390,391,392,0,0,393,394,395,396,397,398,0,0,399,400,401,402,403,404,0,0,285,318,349,378,405,406,0,0,39,85,129,171,211,249,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,407,408,409,410,411,412,0,0,413,414,415,416,417,418,0,0,419,420,421,422,423,424,0,0,425,426,427,428,429,430,0,0,286,319,350,379,406,431,0,0,40,86,130,172,212,250,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,432,433,434,435,436,0,0,437,438,439,440,441,442,0,0,443,444,445,446,447,448,0,0,449,450,451,452,453,454,0,0,275,309,341,371,399,425,0,0,29,75,119,161,201,239,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,455,456,457,458,0,0,459,460,461,462,463,464,0,0,465,466,467,468,469,470,0,0,450,471,472,473,474,475,0,
0,276,310,342,372,400,426,0,0,30,76,120,162,202,240,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,476,477,478,0,0,479,480,481,482,483,484,0,0,485,486,487,488,489,490,0,0,451,472,491,492,493,494,0,0,277,311,343,373,401,427,0,0,31,77,121,163,203,241,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,495,496,0,0,497,498,499,500,501,502,0,0,503,504,505,506,507,508,0,0,452,473,492,509,510,511,0,0,278,312,344,374,402,428,0,0,32,78,122,164,204,242,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,512,0,0,513,514,515,516,517,518,0,0,519,520,521,522,523,524,0,0,453,474,493,510,525,526,0,0,279,313,345,375,403,429,0,
0,33,79,123,165,205,243,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,527,528,529,530,531,532,0,0,533,534,535,536,537,538,0,0,454,475,494,511,526,539,0,0,280,314,346,376,404,430,0,0,34,80,124,166,206,244,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,540,541,542,543,544,0,0,545,546,547,548,549,550,0,0,443,465,485,503,519,533,0,0,269,303,335,365,393,419,0,0,23,69,113,155,195,233,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,551,552,553,554,0,0,546,555,556,557,558,559,0,0,444,466,486,504,520,534,0,0,270,304,336,366,394,420,0,0,24,70,114,156,196,234,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,560,561,562,0,0,547,556,563,564,565,566,0,0,445,467,487,505,521,535,0,0,271,305,337,367,395,421,0,0,25,71,115,157,197,235,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,567,568,0,0,548,557,564,569,570,571,0,0,446,468,488,506,522,536,0,0,272,306,338,368,396,422,0,0,26,72,116,158,198,236,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,572,0,0,549,558,565,570,573,574,0,0,447,469,489,507,523,537,0,0,273,307,339,369,397,423,0,0,27,73,117,159,199,237,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,550,559,566,571,574,575,0,0,448,470,490,508,524,538,0,0,274,308,340,370,398,424,0,0,28,74,118,160,200,238,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,540,541,542,543,544,0,0,437,459,479,497,513,527,0,0,263,297,329,359,387,413,0,0,17,63,107,149,189,227,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,551,552,553,554,0,0,438,460,480,498,514,528,0,0,264,298,330,360,388,414,0,0,18,64,108,150,190,228,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,560,561,562,0,0,439,461,481,499,515,529,0,0,265,299,331,361,389,415,0,0,19,65,109,151,191,229,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,567,568,0,0,440,462,482,500,516,530,0,0,266,300,332,362,390,416,0,0,20,66,110,152,192,230,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,572,0,0,441,463,483,501,517,531,0,0,267,301,333,363,391,417,0,0,21,67,111,153,193,231,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,442,464,484,502,518,532,0,0,268,302,334,364,392,418,0,0,22,68,112,154,194,232,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,432,433,434,435,436,0,0,257,291,323,353,381,407,0,0,11,57,101,143,183,221,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,455,456,457,458,0,0,258,292,324,354,382,408,0,0,12,58,102,144,184,222,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,476,477,478,0,
0,259,293,325,355,383,409,0,0,13,59,103,145,185,223,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,495,496,0,0,260,294,326,356,384,410,0,0,14,60,104,146,186,224,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,512,0,0,261,295,327,357,385,411,0,0,15,61,105,147,187,225,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,262,296,328,358,386,412,0,
0,16,62,106,148,188,226,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,252,253,254,255,256,0,0,5,51,95,137,177,215,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,287,288,289,290,0,0,6,52,96,138,178,216,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,320,321,322,0,0,7,53,97,139,179,217,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,351,352,0,0,8,54,98,140,180,218,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,380,0,0,9,55,99,141,181,219,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,56,100,142,182,220,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,47,48,49,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,92,93,94,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,135,136,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,176};
// Exchange the ranks 1-8, 2-7, 3-6, 4-5. Flips point of view between white and black.
UINT64 flip_color(UINT64 b){
b=((b>>1)&0x5555555555555555)|((b<<1)&0xAAAAAAAAAAAAAAAA);
b=((b>>2)&0x3333333333333333)|((b<<2)&0xCCCCCCCCCCCCCCCC);
b=((b>>4)&0x0F0F0F0F0F0F0F0F)|((b<<4)&0xF0F0F0F0F0F0F0F0);
return b;
}
#if TRAIN
extern _declspec(thread) int pawn_deriv_coeffs[320];
extern _declspec(thread) unsigned int use_hash;
#endif
typedef struct{
unsigned int lock;
int sk4;
} pTT; // 8 bytes
// deriv coeffs:
// 1=isolated
// 2-7=passed, on ranks 2-7 (6 of them)
// 8=passed protected
// 9-22=
// 23-28=candidate passed, on ranks 2-7 (6 of them)
// 29-47=
// 48=backward
// 49-85=protected/protecting/attacked/mobile=3*6*2=6*6=36.
// 86: free
//void pass_forward_b(board*,short int*);
int pawn_score(board *b){// return scores for WHITE.
volatile UINT64 *h1;
UINT64 w_bb,b_bb,w_bb_t,b_bb_t;
pTT h;
unsigned long bit;
unsigned int i,j,sq[2][8],sq_cnt[2]; //sq: list of all pawns.
int sk4;
// look in pawn hash table
h1=&ph[b->pawn_hash_key%PHSIZE];
h=((pTT*)h1)[0]; // atomic read
#if TRAIN
#else
if( h.lock==((unsigned int*)&b->pawn_hash_key)[1] )
return(h.sk4);
#endif
h.lock=((unsigned int*)&b->pawn_hash_key)[1]; // save lock now (into h, not into real memory!)
sk4=0;// init scores
// populate bitboards
w_bb=b->piececolorBB[0][0];//white pawn
b_bb=flip_color(b->piececolorBB[0][1]);//black pawn, flipped so that it is from point of view of white
// loop over all pawns
w_bb_t=w_bb;
sq_cnt[0]=0;
while( w_bb_t ){// white
GET_BIT(w_bb_t)
sq[0][sq_cnt[0]++]=bit; // record position of this pawn
#if calc_pst==1
sk4+=((int*)&piece_square[0][0][bit][0])[0];// white P PST
#endif
// count isolated pawns. Here i count doubled isolated pawns as 2 isolated.
if( (is_mask[bit>>3]&w_bb)==0 ){
sk4-=((int*)&adj[O_ISOLATED])[0];
#if TRAIN
pawn_deriv_coeffs[1]--; // 1=isolated************************************************************************************************************
#endif
}
// count passed and candidate passed
i=(unsigned int)popcnt64l(w_bb&protected_mask[bit]);// protected count, 0-2
if( !((w_bb&blocked_mask[bit])|(b_bb&halfopen_mask[bit])) ){// not blocked by anyone - half-open file. Could be (candidate) passed
if( (b_bb&passed_mask[bit])==0 ){ // passed pawn
if( (bit&7)<6 )// skip rank 7
sk4+=((int*)&adj[O_PASSED+(bit&7)*2-2])[0];
#if TRAIN
pawn_deriv_coeffs[2+(bit&7)-1]++; // 2-7=passed, on ranks 2-7************************************************************************************************************
#endif
if( i ){// protected passed pawn
sk4+=((int*)&adj[O_PASSED_PROTECTED])[0];
#if TRAIN
pawn_deriv_coeffs[8]++; // 8=passed protected************************************************************************************************************
#endif
}
}else if( popcnt64l(w_bb&forward_protected_mask[bit])>=popcnt64l(b_bb&(passed_mask[bit]^halfopen_mask[bit])) ){// assume candidate if current and forward squares have same of more defenders as attackers
if( (bit&7)<6 )// skip rank 7
sk4+=((int*)&adj[O_CAND_PASSED+(bit&7)*2-2])[0];
#if TRAIN
pawn_deriv_coeffs[23+(bit&7)-1]++; // 23-28=candidate passed, on ranks 2-7************************************************************************************************************
#endif
}
}
}
b_bb_t=b_bb;
sq_cnt[1]=0;
while( b_bb_t ){// black
GET_BIT(b_bb_t)
sq[1][sq_cnt[1]++]=bit; // record position of this pawn - in flipped format(white's point of view)
#if calc_pst==1
sk4+=((int*)&piece_square[0][1][flips[bit][1]][0])[0];// black P PST
#endif
// count isolated pawns. Here i count doubled isolated pawns as 2 isolated.
if( (is_mask[bit>>3]&b_bb)==0 ){
sk4+=((int*)&adj[O_ISOLATED])[0];
#if TRAIN
pawn_deriv_coeffs[1]++; // 1=isolated************************************************************************************************************
#endif
}
// count passed and candidate passed
i=(unsigned int)popcnt64l(b_bb&protected_mask[bit]);
if( !((b_bb&blocked_mask[bit])|(w_bb&halfopen_mask[bit])) ){// not blocked by anyone - half-open file. Could be (candidate) passed
if( (w_bb&passed_mask[bit])==0 ){ // passed pawn
if( (bit&7)<6 )// skip rank 7
sk4-=((int*)&adj[O_PASSED+(bit&7)*2-2])[0];
#if TRAIN
pawn_deriv_coeffs[2+(bit&7)-1]--; // 2-7=passed, on ranks 2-7************************************************************************************************************
#endif
if( i ){// protected passed pawn
sk4-=((int*)&adj[O_PASSED_PROTECTED])[0];
#if TRAIN
pawn_deriv_coeffs[8]--; // 8=passed protected************************************************************************************************************
#endif
}
}else if( popcnt64l(b_bb&forward_protected_mask[bit])>=popcnt64l(w_bb&(passed_mask[bit]^halfopen_mask[bit])) ){// assume candidate if current and forward squares have same of more defenders as attackers
if( (bit&7)<6 )// skip rank 7
sk4-=((int*)&adj[O_CAND_PASSED+(bit&7)*2-2])[0];
#if TRAIN
pawn_deriv_coeffs[23+(bit&7)-1]--; // 23-28=candidate passed, on ranks 2-7************************************************************************************************************
#endif
}
}
}
// my pawn vs my pawn - new index development logic, with look-up table.
for(i=0;i+1<sq_cnt[0];++i){
unsigned int bit=sq[0][i];
for(j=i+1;j<sq_cnt[0];++j){// loop over P2, P2>P1
unsigned int index=index_pawn[bit*64+sq[0][j]];
sk4+=((int*)&adj[O_PP+index*2])[0];
}
}
for(i=0;i+1<sq_cnt[1];++i){// all bits are already from white's POV
unsigned int bit=sq[1][i];
for(j=i+1;j<sq_cnt[1];++j){// loop over P2, P2>P1
unsigned int index=index_pawn[bit*64+sq[1][j]];
sk4-=((int*)&adj[O_PP+index*2])[0];
}
}
// add score to pawn hash table. Always replace.
#if TRAIN
#else
h.sk4=sk4;
((pTT*)h1)[0]=h; // atomic write
#endif
// return score for WHITE.
return(sk4);
}