Lobbies and Games

Tenhou Documentation


Tenhou is split up into lobbies, which are simply waiting rooms for games. Players can only play with other players in the same lobby, and can only watch games from the lobby they were created in. Lobbies are identified by numbers, usually prefixed with an L (i.e. L7447, L8000, etc.).

All lobbies other than L0000 are unranked.

Creating Lobbies

To create a lobby, go to 個室作成 (create private room) and pick the 個室ロビーの作成 (create private lobby) option. This gives you a free lobby with an ID between 1000 and 7999 (generated randomly). Lobbies below and above, respectively, are reserved. There is a private lobby log from the last 24 hours showing the games played, too.

Key Lobbies

Tournament Lobbies

Tenhou tournaments have a lot to them. Creation is similar to the procedure for making a private lobby, although you pick the 大会ロビーの作成 (create tournament lobby) option instead. More information is in the championship section.


There are 6 types of game available to play on Tenhou:
喰断ナシNashiNo open tanyao
喰断アリAriOpen tanyao allowed
喰アリ赤Ari redAri with red fives
喰アリ赤速Ari red fastAri with red fives and half time on turns
三喰アリ赤3-man Ari redAri with red fives and only 3 players
三喰赤速3-man Ari red fast3-man Ari with red fives and half time on turns

The two round types (the columns) are tonpuusen (東風戦) -- East only round; and tonnansen (東南戦) -- East and South rounds.

Once upon a time there was also a highlighted mode that would grey out tiles that were immediately discarded after drawing them, in players' ponds. It was removed because people complained about it, though.

Joining games is done by clicking which mode you wish to play in the above table. The pushed down buttons indicate which games you are waiting for, or queued for. Games start when there are three other people (or two, in the case of 3-man) queued. To leave the queue(s), click the キャンセル (cancel) button in the bottom right of the box. The x:y numbers next to each game type show players queued:players in-game.

L0000 Rooms

L0000 (the free lobby) has 4 rooms for players of different levels. They are as follows:

一般GeneralAll players
上級Dan1dan or greater
特上Upperdan4dan/R1800 or greater
鳳凰Phoenix/Gigadan7dan/R2000 or greater

Lobby Features

Official and tournament lobbies differ from private lobbies in a few ways. Below is a table showing the differences:
Play the same IPRankedDefault chat mode
Free Lobbynoyesoff
Private Lobbyyesnooff
Tournament Lobbynonoon

Lobby Stats

At the top of the lobby window there are three figures. From left to right: total players connected (globally, not just per lobby); total idle/waiting players (per lobby); players in their last round (per lobby).

The text beneath the tabs also shows the modifiers for the game type being hovered over.

Game Ranks

You can be selective in who you play, too. On the lobby window there's tabs for three game ranks. Different game ranks require different user ranks to play. Choose by the tabs.

From left to right, the tabs are:
General room (all players of all ranks), Dan room (registered players with dan rank), Upperdan room (registered players with, at least, dan rank of 4 and rate of 1800), Upperdan spectate, Past game spectate, Help.


On the lobby window there's also a menu with assorted things in it. They are listed below.

  1. Replay List of past matches (see: Replays)
  2. Lobbies Common official lobbies (see: Lobby Menu)
  3. Minigames (see: Minigames)
  4. Reset Settings Clear all replay records and computer-specific preferences. Not a great idea since it clears all the replay links.
  5. Purchase Account Buy an ID for fancy things like the Windows client (see: Purchasing an ID)
  6. Logout

Lobby Menu

  1. L0000
  2. L8000


Tenhou also has various minigames that you can play from the minigame droplist:

  1. Puzzle 1

    This is your classic Mahjong solitaire game. You slide off matching tiles to the left or right until you clear the field. There's up to 5 levels and also a level editor:

    It gives you a small text editor to make a field. The syntax is:

    • . for a blank space
    • o for a tile (randomly generated)
    • Maximum of 136 tiles
    • Number of used tiles must be a multiple of four (4)
    • The bottom layer goes first, the next layer after that, and so on
    • Layers are delimited by two new lines
    An error will come up if there is something wrong with what you've made.

  2. Puzzle 2

    This game involved matching tiles together that have clear paths between them. Paths can have up to two turns in them.

  3. Practice Mahjong

    Given a set of tiles, make a hand out of them as fast as possible. This game has a Time Attack mode and a limitless mode, which you select in the menu. You can also pick how many tiles you get at the start.

Test Play

You can also play against computers if you want to practise. Although they have no difficulty setting you can pick 3 types of game:

  1. Ari Red Fast
  2. Ari Red
  3. 3-Man

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Last updated: 2009-02-07