MJ welcome screen with campaign levels from Newcomer to Grand Master
Utilities

MJ

Hong Kong–style mahjong skills test against AI agents

MJ is a Hong Kong–style mahjong skills test in the browser — no install. You sit East against three AIs and play full sessions. Finish a session ranked first by purse profit to advance from Newcomer (新丁) to Grand Master (牌王).

Opponents get stronger each level, from casual baseline bots up through purse-aware AIs. The table supports English and Hong Kong Traditional Chinese, with optional Cantonese voice calls. Progress stays in your browser.

Features

  • Play in the browser — no app to install
  • Ten campaign levels against progressively stronger AIs
  • Promotion by finishing first on purse, not win count
  • Hong Kong rules (not riichi), with optional minimum faan
  • English and Hong Kong Traditional Chinese, plus Cantonese table calls
  • Progress saved locally in your browser

Screenshots