I find that passing the guard of more flexible people is really irritating. It seems to really limit my options. Its not that passing the guard is impossible to do, its just that you need far better technique than dealing with a person of average flexibility. Its usually the people who have natural or usable flexibility that are most difficult. Some people have developed their flexibility, can do the splits etc but don't seem to be able to use that flexibility in sparring as often. The guys with natural flexibility can put themselves in positions without needing pressure to get in those positions. The guard passes that don't work as well with them are ones that involve stacking. They seem to be able to get their feet into any nook or cranny which negates the pass. Does anyone have any suggestions for dealing with these kinds of people.