char *midend_set_config(midend_data *me, int which, config_item *cfg);
char *midend_game_id(midend_data *me, char *id, int def_seed);
char *midend_text_format(midend_data *me);
+char *midend_solve(midend_data *me);
/*
* malloc.c
game_state *(*new_game)(game_params *params, char *seed);
game_state *(*dup_game)(game_state *state);
void (*free_game)(game_state *state);
+ int can_solve;
+ game_state *(*solve)(game_state *state, game_aux_info *aux, char **error);
int can_format_as_text;
char *(*text_format)(game_state *state);
game_ui *(*new_ui)(game_state *state);