Dora

Dead wall

After determining the wall break and getting a starting hand, the player sitting on the side of the break counts 7 stacks counterclockwise from the break and separates it from the main wall. This is the dead wall.

Tiles in the dead wall can be divided into five groups:

• Replacement Tiles (left two stacks)
• Dora indicator (the third upper left hand tile)
• Ura-dora indicator (the tile below the dora indicator)
• Kan-dora indicator (top four tiles to the right of the dora indicator)
• Kan-ura-dora indicators (Four lower tiles to the right of the ura-dora indicator; correspond to their counterparts above)

Dead wall								End of live wall
1st rinshanpai	3rd rinshanpai	Dora indicator	1st kandora	2nd kandora	3rd kandora	4th kandora		2nd haiteihai	4th haiteihai
2rd rinshanpai	4rd rinshanpai	1st uradora	2nd uradora	3nd uradora	4nd uradora	5nd uradora		1st haiteihai	3rd haiteihai

Dora

After that you need to turn the third from the top left dead wall tile, which is the dora indicator, as shown in the table above.

Ura-dora

Ura-dora is an additional dora indicator that can only be applied to hands with declared riichi. Based on this, no open hand can use hurrah-dora. The hurrah-dora indicators are below the dora and kan-dora indicators and open accordingly to them at the end of the round.

Kan

Kan types

Daiminkan (大明槓)	Shouminkan (小明槓)	Ankan (暗槓)
Open	Extended pon	Closed

Kan calling

Conditions

1. Kan can't be called on a last tile of live wall because there is no haiteipai to move to the dead wall after kan.
2. After calling riichi you can call only ankan.

Procedure

1. After a call for kan, player puts kan at right side.
2. Player takes corresponding rinshanpai from the clockwise part of the dead wall after a dora indicator.
3. The corresponding haiteipai(海底牌) from the live wall moves to right side of the dead wall for save count of ingame tiles.
4. Player discards tile from hand or taken rinshanpai.
5. Kan-dora indicator are revealed. It's four tile counterclockwise after dora indicator.
6. In the end of hand-round corresponding uradoras opens. You can use it if you have called riichi and win.

Nuki-dora

Sanma rule

North tiles may be called as dora (placing like a flower tiles in other mahjong styles). Then you need to act as a kan calling. Because the dead wall have a different structure as a 4-player mahjong, it's became possible.

After calling kita forth times, new dora appears.

If you kan closed tanki or tatsu of pei being tenpai and the another player calls kita you need, you can call ron ton this pei.