#define BOARDX 150
#define BOARDY 100
#define PREVX 500
#define PREVY 150
#define PREVW 60
#define PREVH 60
#define BOARDH 420
#define BOARDW 250
#define MAXYLINES 13
#define MAXXLINES 8
#define STONEW BOARDW/MAXXLINES
#define STONEH BOARDH/MAXYLINES