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- #include "comment.header"
-
- #define EMPTY 0
- #define BLACKSTONE 2
-
- extern unsigned char p[19][19], l[19][19];
- extern int MAXX, MAXY;
- extern int currentStone, opposingStone, whiteCaptured, blackCaptured;
- extern int whiteCapturedKoI, whiteCapturedKoJ, blackCapturedKoI, blackCapturedKoJ;
- extern void eval(int color);
-
- void examboard(int color)
- /* examine pieces */
- {
- int i, j, n;
-
- for (i = 0; i < MAXX; i++)
- for (j = 0; j < MAXY; j++)
- if (p[i][j] > 2)
- return;
-
- /* find liberty of each piece */
- eval(color);
-
- /* initialize piece captured */
- if (color == BLACKSTONE)
- {
- blackCapturedKoI = -1;
- blackCapturedKoJ = -1;
- }
- else
- {
- whiteCapturedKoI = -1;
- whiteCapturedKoJ = -1;
- }
- n = 0; /* The number of captures this move for Ko purposes */
-
- /* remove all piece of zero liberty */
- for (i = 0; i < MAXX; i++)
- for (j = 0; j < MAXY; j++)
- if ((p[i][j] == color) && (l[i][j] == 0))
- {
- p[i][j] = EMPTY;
- /* record piece captured */
- if (color == BLACKSTONE)
- {
- blackCapturedKoI = i;
- blackCapturedKoJ = j;
- ++blackCaptured;
- }
- else
- {
- whiteCapturedKoI = i;
- whiteCapturedKoJ = j;
- ++whiteCaptured;
- }
- ++n; /* increment number of captures on this move */
- }
- /* reset to -1 if more than one stone captured since no Ko possible */
- if ((color == BLACKSTONE) && (n > 1))
- {
- blackCapturedKoI = -1;
- blackCapturedKoJ = -1;
- }
- else if ( n > 1 )
- {
- whiteCapturedKoI = -1;
- whiteCapturedKoJ = -1;
- }
- } /* end examboard */
-
-