LeagueNight

Compute a round-robin fixture list (circle method) for 2-100 teams: every pair meets once, or twice home-and-away with second_leg; odd counts get one bye per round. Use when you need who plays whom in each round. Do NOT use to assign times/courts for one match day (use match_day_plan) or to get calendar dates for a season (use season_plan).

Compute a league standings table from match results: played, W/D/L, goals for/against, goal difference and points, sorted by points, then goal difference, then goals for, then name. Use when you have scores and want the current table. Do NOT use to generate future fixtures (use round_robin_schedule).

Compute a one-day timetable: lay an ordered list of games onto parallel courts and fixed-length time slots from a start time, giving each game a court and HH:MM start, plus the end time. Use when you already know the day's games. Do NOT use to decide who plays whom (use round_robin_schedule) or to size a whole season (use season_plan).

Estimate a season's size and calendar: total round-robin fixtures, games per match day (limited by courts, one slot per day), match days needed, every match-day date from start_date at a fixed interval, and the finish date. Use for "when will the season end?". Do NOT use for pairings (use round_robin_schedule) or one day's timetable (use match_day_plan).