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Request for Comment on MMR Refactor
As some of you may be aware, the Trench Wars development team is working on some refactors to the current mmr system. There are quite a few changes so please review and leave any comments or concerns you may have.
Ratings
Ratings
- Player ratings will be reset.
- Players start at 1500 instead of 3000.
- Estimated scores (which is used in end of round rating adjustments with actual score) uses a new algorithm that is more accurate.
- Wins and losses now factor in final score (before would assign 0.0 for loss and 1.0 for win)
- Actual score is calculated by looking at total team deaths (for team elim) or flagtime (for base)
- For example, winning 49-50 in team elim will net a score of 0.51 instead of the previous 1.0.
- Finer score calculation also means it's possible to lose points even if you win (if not by margins in estimated score)
- New K-Factor (uncertainty) algorithm that scales with games played to quickly settle new players into a rating.
- Max rating change (unaccounting for K-Factor) is set to 32.0
- New greedy algorithm for building teams mainly based on highest rated players available (before used a brute-force shuffle).
- Optional flag for prioritizing bencher as well.
- League ops will coordinate times when bencher prioritization will be disabled to get higher quality games.
- Players are sorted in following order, moving to next step if both players have the same value:
- Benched last round (optional)
- Rating (high-to-low)
- Games played (high-to-low)
- Date signed-up to TWD (earliest-to-latest)
- Teams are built by first team picking from sorted list of players, then compares each teams cumulative rating, and lower rated team picks next (possible for multiple times in row)
- Larger teams are prioritized over multiple smaller teams (ie, one 5v5 with 6 benched instead of two 4v4s if 16 queued)
- MMRB is now supported as well.
- Players may only `!p` for one given ship at a time, so choose wisely.
- Ship are limitted to terrier, shark and spider for now.
- New `!needsub` and `!sub` feature for requesting a sub or subbing in for another player.
- Subs must be within 200 rating point diff from person they are subbing.
- Estimated and actual scores for rating change is adjusted for each players time played.
- You may not use `!needsub` if you used `!sub` to get into a game.
- With the more accurate estimated and actual scoring for rating adjustments, performance blocks have been removed for the time being.
- Players can still be banned however for afking, teamkilling, abusing `!needsub` or using any other feature of the bot as not attended.
- Bot will be fully automated.
- Referrees will lock bots to given arena and a queue will start when a player uses `!p`.
- Queue will stay open for up to 5 minutes while players join.
- Timer for 30s will be set to make teams if queue reaches minimum number of required players (ie, 8 for 4v4)
- A shorter timer for 10s will be set to make teams if queue reaches maximum number of required players (ie, 10+ for 5v5)
- Teams will generate and be assigned to an arena. After last arena finishes it's round, the bot will reopen the queue after 10s.
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