Aotenjou Mahjong – No-Limit Two-Player Mahjong

A head-to-head Riichi mahjong game with no scoring cap, played with only bamboo (souzu) and honor tiles. Play against the CPU, free in your browser.

Players: 1 (vs CPU) Match length: Hanchan (East, South, West, North) Works on phones and desktops Play full screen

How to play

Press Start vs CPU to begin a hanchan.
On your turn you draw one tile from the wall, then tap one tile in your hand to discard it.
When the CPU discards a tile you can use, buttons for Pon, Chi, Kan, or Ron appear. Press a button to call the tile, or pass to skip.
When your hand is complete, win by self-draw (Tsumo) or on the CPU's discard (Ron). The points you win are added straight to your score.
When the hanchan ends, the player with more points wins.

If you already know Riichi mahjong, everything works as you would expect. The rules summary is also available from the start screen (View Rules).

Rules

Tiles

Only bamboo (souzu) 1–9 and the seven honor tiles are used: East, South, West, North, and the White, Green, and Red dragons. There are four copies of each, for a total of 64 tiles. Characters (manzu) and circles (pinzu) are not in the game. Each player starts with 13 tiles.

Aotenjou (no-limit) scoring

There is no cap on a winning hand's score. There are no mangan or haneman tiers: the score comes from fu and han alone, and every extra han doubles it. Yakuman are scored the same way, with each yakuman counted as 13 han. Dora and ura-dora are in play, so a well-built hand can reach enormous numbers.

Yaku

Because the deck is only bamboo and honors, almost every winning hand also scores honitsu (half flush) or chinitsu (full flush). Open tanyao (kuitan) and late-added yaku (atozuke) are allowed.

Scores and match length

Both players start at 0. No points change hands: the winner of a hand simply adds the score to their own total. A hanchan runs from East 1 to North 2, going East, South, West, then North, with dealer repeats.

Leaderboard

If your total at the end of a hanchan makes the top 100, you can submit it under a display name (the leaderboard will open when it is ready).

Tips

Stack han first. Every extra han doubles your score, so layering yaku beats rushing a cheap win.
Aim for honitsu or chinitsu. Almost any completed hand scores these, so when in doubt, steer toward the bigger hand.
Do not clear honors too early. There are only four of each, so a pair or triplet of honors is powerful, and it opens the door to dragon and wind yakuman.
Riichi can pay off twice. Ura-dora add han, so a ready hand with riichi is a big weapon.
Watch the CPU, too. Even with no points changing hands, a big hand from the CPU is hard to catch up to.