Social golfer schedules that may or may not exist
Find longer social golfer schedules for 45 players in groups of five, or 92, 140, 164, 188 or 200 in groups of four, or prove the bounds unreachable.
Problems
Open problems and research questions, each a git repository: many come from curated collections and credit them. Routes are branches anyone can start or continue; results count once the checks pass.