Rating trust guide

How MPR Works

MPR is a 1.0–10.0 Mahjong Performance Rating that gives players a consistent way to follow progress across verified events.

A rating built from verified play

Event results are submitted through an authorized host portal and validated before they affect player ratings. MPR keeps the complete event and rating history needed to audit a posted change.

Your first four events are calibration

New players begin with a provisional rating. During the first four verified events, the rating can move more freely while the system establishes a useful starting level. After calibration, standard rated play begins.

Measured against your competition

Your MPR reflects more than whether you won — it reflects who you played. The system weighs the strength of the players at your table and how you performed against them, so a strong result against tougher competition carries more weight than an easy one. Your rating is always measured in context: your results, against your real competition.

What members can see

Guests can keep a free profile and see a privacy-safe rating band. Members see the exact two-decimal rating, full movement history, trajectory, recent form, and progress toward the next tier.

What stays private

MPR publishes the meaning of rating states and the history behind each player-facing update. The proprietary calculation itself, private service credentials, and internal anti-abuse controls are not published.