FFLAG
board[tcbp->c_vertex].s_flags |= FFLAG << tcbp->c_dir;
board[cbp->c_vertex].s_flags |= FFLAG << cbp->c_dir;
int bmask = (BFLAG | FFLAG | MFLAG) << r;
if ((fsp->s_flags & (FFLAG << r)) != 0)