Mental calculation, ranked

Train sharper. Beat sharper minds.

Solo runs to warm up, private duels to challenge friends, and public pools to match against random calculators. All under one honest scoring engine.

Start trainingI already have an account

Ranked practice

Every session feeds a rating that reflects speed and accuracy honestly.

Live multiplayer

Duel a friend privately or match with a random player through the pools.

Play a bot

Three difficulties, instant match, no waiting for a human opponent.

GMCA competition formats

48 formats, three stages

Browse the formats

Regular season, playoffs and finals. The same formats the Global Mental Calculation Association competes on, at the tier you are ready for.

  1. 01
    Regular seasonThe entry tier. Every format at its easy setting.
  2. 02
    PlayoffsA step up. Every format at its medium setting.
  3. 03
    FinalsThe top tier. Every format at its difficult setting.
  • Standard4
  • Complex35
  • Multi-operation9
  • 48 formats