ret = dup_game(state);
memcpy(ret->tiles, state->solution->tiles, ret->width * ret->height);
ret->used_solve = ret->just_used_solve = TRUE;
ret = dup_game(state);
memcpy(ret->tiles, state->solution->tiles, ret->width * ret->height);
ret->used_solve = ret->just_used_solve = TRUE;