| /* |
| GNU GO - the game of Go (Wei-Chi) |
| Version 1.1 last revised 3-1-89 |
| Copyright (C) Free Software Foundation, Inc. |
| written by Man L. Li |
| modified by Wayne Iba |
| 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 1. |
| |
| 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 |
| |
| mail address: Man L. Li |
| Dept. of Computer Science |
| University of Houston |
| 4800 Calhoun Road |
| Houston, TX 77004 |
| |
| e-mail address: manli@cs.uh.edu (Internet) |
| coscgbn@uhvax1.bitnet (BITNET) |
| 70070,404 (CompuServe) |
| */ |
| |
| #include <stdio.h> |
| |
| #define EMPTY 0 |
| |
| extern unsigned char p[19][19], l[19][19]; |
| extern int mymove, umove; |
| extern int lib; |
| extern int uik, ujk; /* piece captured */ |
| |
| extern void countlib(int m, int n, int color); |
| extern void eval(int color); |
| |
| 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 */ |
