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
|
/*
GNUGO - the game of Go (Wei-Chi)
Version 1.2 last revised 10-31-95
Copyright (C) Free Software Foundation, Inc.
written by Man L. Li
modified by Wayne Iba
modified by Frank Pursel <fpp%minor.UUCP@dragon.com>
documented by Bob Webber
*/
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation - version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License in file COPYING for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Please report any bug/fix, modification, suggestion to
manli@cs.uh.edu
*/
/*----------------------------------------------
suicide.c -- Check for opponent illegal move
----------------------------------------------*/
#include "gnugo.h"
extern unsigned char p[19][19]; /* go board */
extern unsigned char l[19][19]; /* liberty of current color */
extern int mymove, umove; /* computer color, opponent color */
extern int lib; /* current stone liberty */
extern int uik, ujk; /* location of opponent stone captured */
int suicide(int i,
int j)
/* check for suicide move of opponent at p[i][j] */
{
int m, n, k;
/* check liberty of new move */
lib = 0;
countlib(i, j, umove);
if (lib == 0)
/* new move is suicide then check if kill my pieces and Ko possibility */
{
/* assume alive */
p[i][j] = umove;
/* check my pieces */
eval(mymove);
k = 0;
for (m = 0; m < 19; m++)
for (n = 0; n < 19; n++)
/* count pieces will be killed */
if ((p[m][n] == mymove) && !l[m][n]) ++k;
if ((k == 0) || (k == 1 && ((i == uik) && (j == ujk))))
/* either no effect on my pieces or an illegal Ko take back */
{
p[i][j] = EMPTY; /* restore to open */
return 1;
}
else
/* good move */
return 0;
}
else
/* valid move */
return 0;
} /* end suicide */
|
