for (i = 0; i < from->solution->npegs; i++) {
int val = atoi(p);
- if (val <= 0 || val > from->params.ncolours) {
+ int min_colour = from->params.allow_blank? 0 : 1;
+ if (val < min_colour || val > from->params.ncolours) {
free_game(ret);
return NULL;
}