Choue Backgammon
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Your ratings and PR

Performance shows how you stand: three match ratings, each with its percentile among the active players, and your PR over all your analysed play.

Rated matches are matches against other players, and bot matches you start as Rated. A rated match has no hints and ends only when it is finished or resigned. Every rated match moves three ratings at once, in the same direction but by different amounts:

  • Elo goes by the result alone, as on FIBS: more for beating a stronger opponent, more in a longer match.
  • Luck-Adjusted Elo first takes the dice luck out of the result, so a lucky win can cost a point or two and an unlucky loss can gain some. Elo minus Luck-Adjusted Elo is your luck balance.
  • PR-Scaled Elo scales the Elo change by how well both of you played: winning while outplaying your opponent earns up to twice the points, losing while outplaying them costs less.

1-point matches have no cube and no gammons, so they have ratings of their own, the DMP League, which do not touch the others. No rating is the official one: arrows on the tiles put the one you trust most first, and every list follows your order.

  1. Your name at the top right opens the account menu.
  2. Choose Performance. The Lobby's Performance tile opens the same page.
Choose Performance.
  1. Matches holds your ratings in matches, DMP League those in 1-point matches, which are rated apart, and PR your performance rating over all your analysed play.
  2. Your ratings appear after your first rated match, a match against another player, or a bot match you started as Rated. Each comes with its percentile among the active players, and arrows to put the rating you trust most first, everywhere.
  3. PR is your performance rating, the equity you lost through errors per decision, lower is better.
  4. The average weighs every decision alike; the median is the middle of your sessions' PRs and runs lower. Below them, how many decisions and sessions they cover.
The average and the median PR.
  1. The filters narrow the PR down, to matches of some lengths or to money play, to cube or checker decisions, to rated or non-rated matches, and to the last 100 sessions, your lifetime or a range of dates.

Once you have rated matches, the page also shows their history as charts, your performance by match length and your recent matches with each rating's change, both players' PR and your net dice luck. The ⓘ on a tile works the rating out on your last match with the real numbers.