How to play Mahjong
When your hand is ready and fully concealed, you can call "Riichi".
First turn Riichi.
Winning within one turn after declaring Riichi.
Fully concealed (Menzen) and self picked hand.
Winning by final Tsumo or Ron.
Winning by picking after Kan.
Winning on other's added tile of Kan.
Triplet of dragon or round wind or position wind.
All sequences.
Must be concealed (Menzen).
Must be waiting two tiles.
Pair must not be Yaku-Pai.

Only suit tiles from 2-8.
No terminals or wind or dragon.

Pair sequences.
Must be concealed (Menzen).

The same sequence in three suits.

Straight.

Three concealed triplets.

The same number triplets in three suits.

All triplets.
Pon or Kan may be contained.

Sseven pairs.

Terminals or honors in each set.

Terminals and honors.

Three Kans
One suit and honors.

Terminals in each set.

Double Ii-Pei-Kou.

Two triplets and one pair of dragons.

One suit.

The following number of opened tile becomes Dora.
1-2-3-4-5-6-7-8-9-1
East-South-West-North-East
White-Green-Red-White
If you go Riichi, you can open a tile under Dora.
Dealer's winning of initial fourteen tiles.
Non-dealer's winning of first draw.
Non-dealer's winning before first draw.
All kinds of terminals and honors.

Four consealed triplets.

Three triplets of dragons.

Three triplets and one pair of winds.

Four triplets of winds.

All honors.

All green(2,3,4,6,8 of bamboo and green dragon).

All terminals.

1112345678999 and any tile.

Four Kans
Description:
Comments & Ratings
Rating: 7/10
Just a thing : is it possible that you didn't implement all the rules? Because Sometimes when I am in possession of a Dora it tells me I have no multiplier. Example happening to me right now : I have an exposed 4b 5b 6b and the dora tile is the 4b (in my rules 5b should be Dora as 4b is the indicator ... but both are covered since it's a Chii). I have Ron waiting and I can't take it because it says "No Multiplier". It is kinda frustrating (it might be me). pls tell me. I love this game.
Rating: 9/10
I have a question. I can call tsumo/ron and is says 'no multiplier' although i have a pair. Do you mayby know why?
Rating: 9/10
But if your hand is fully concealed ('menzen'), which means you did not call on your opponents' tiles to declare pon, chii or kan, you actually can call tsumo. It is a yaku in this only case. But when your hand is exposed, tsumo is not a yaku. Better not call on tiles unless you're doing a yaku-pai :)
Rating: 7/10
@uryuishida : go learn the rules before playing. You must at least have 1 Yaku in your hand to declare a valid Ron/Tsumo.
Rating: 10/10
this game is great for everyone who loves mahjong and i thank you for creating this game because i have no friends who know about japanese mahjong. that uryuishida guy doesen't understand the game at all and deserves a slap accross the face. thank you for making this wonderful game
Rating: 1/10
This game is a bunch of bullshit. I call ron or tsumo and it says no multiplier...wtfrnThere is no way to win.