Your league will probably die in week six.
Not dramatically. Taylor is busy one Thursday, then busy again. The group chat stops lighting up on Wednesday nights. Eventually someone asks whether you're still doing the thing, nobody answers, and that's the season.
Most leagues end roughly like this, and almost never for the reason people assume. The scoring wasn't wrong. Taylor lost eleven games in a row and nobody noticed in time.
Four rules. Follow them and you'll finish a season.
An open-ended league doesn't die of boredom. It dies of not mattering. If week 40 counts exactly as much as week 4, then no particular week counts at all.
Eight to twelve weeks. Long enough that one catastrophic night doesn't define anybody, short enough that people can see the end from where they're standing.
The reset is the part groups underrate. Whoever finished last gets to start over. Whoever won has something to lose. That's most of the tension in any league and you get it free, just by having seasons at all.
Alex is there every week. Jordan makes it maybe three times. Rank by total wins and Alex takes the season by being available; rank by win percentage and Jordan goes 3-0 on one lucky night in October and leads until December. A rating sorts that part out, so five games and twenty-five can sit on the same board honestly.
The quieter problem is that by June your standings are half ghosts. Casey played twice in March and is still parked in fourth. Nobody wants to remove Casey. Casey might come back.
No formula fixes that one. Pick a number of missed games - twenty is a reasonable default - and past that, people drop off the board. Not deleted, not reset. Casey turns up in July, plays one game, and reappears exactly where they left off.
Nobody has to be told they've been dropped, and nobody has to be added back.
This is the rule that actually decides whether a league survives.
Someone in your group is going to be the worst player. On a plain win count, that person watches the number next to their name refuse to move for two months. Nobody says anything about it. They just start being busy on Thursdays.
What helps:
That last one isn't a feature of anything. It's the actual fix. The scoring system's only job is to not work against you while you do it.
Someone will volunteer. They will be sincerely enthusiastic about it for about two weeks.
By week five it's a chore bolted onto an evening that's supposed to be fun. They'll do it late, then do it in batches, then not at all. Nobody ever quits this job. It just quietly decays.
The only version that survives is logging results at the table, before the box gets packed, in under a minute. Anything you plan to do later is a thing you are not going to do.
End date → 8-12 weeks, then reset
Attendance → a rating for comparing, and drop people off the board once they stop showing up
Bottom of the table → make climbing possible, and notice people
Admin → at the table, or not at all
Shmelo does the boring half:
None of which matters if the group doesn't actually want a league. Ask them on a night they're already having a good time, and if the answer is lukewarm, just keep playing games. A league nobody asked for dies in week six too.
30 seconds to log a game
Miss a few weeks, keep your rating