If not stated otherwise, the gameplay follows EMA Riichi rules (2016 ver.). Head referee, who oversees the running of the entire game, has final say in any disputes.

Key: ari – applies, nashi – doesn’t apply

1. Tiles and tenbō points

2. Winds

3. Gameplay

4. Yaku
   1. Renhō – yakuman
   2. Daburu yakuman – sūanko tanki machi, kokushi 13 sided-wait, daisūshi, Chūrenpōton 9 sided-wait,
   3. Pārenchan:
      • is awarded for eight consecutive oya wins. The streak is not broken by renchan, where oya is tenpai. If there are already 8 honba on the table, oya is required to win for the 9^th time, however this time it is permitted to win without a yaku. Oya gets yakuman and the dealership changes
   4. Kazoe yakuman – ari/あり
   5. Nagashi mangan – ari/あり

5. Winning

6. Abortive draws

7. Penalties

Chonbo/冲合:

• 6 or more tiles revealed
• noten riichi
• ron/tsumo by mistake and showing at least 6 tiles
• a declaration while having a dead hand
• no yaku
• furiten ron

Dead hand/アガリ放棄:

• too many/few tiles in hand
• ron/tsumo by mistake and showing 3-5 tiles
• 3 or more tiles revealed

Empty calls/空チー/空ポン/空カン:

• 100 tenbō fine to the stack (only chii, pon, kan)

False calls/誤チー/ 誤ポン/誤カン:

• Confusing chii, pon and kan declarations results in 100 tenbō fine to the stack

Claiming a false set:

• 100 tenbō fine to the stack in addition to EMA rules

Riichi:

• Forgetting to place a riichi bet results in 100 tenbō fine to the stack
• Forgetting to rotate the next discarded tile, in case the riichi tile was claimed for a set, results in dead hand if pointed out or in chonbo if at least 6 tiles are revealed

8. Final scores
   1. Add 20 000 oka to the winner’s score
   2. Deduct 30 000 tenbō from each person’s score
   3. Divide by 1000, round 0,4 down and 0,5 up. Winner’s score is processed the last, if needed adjusted so the total sum is zero
9. Tournament format
   1. Priority in the highest accumulative score
   2. In case of a tie, the priority is as follows:
      • Higher number of 1^st places
      • Average of the places in the tournament (lower the better)
      • Lower number of 4^th places
      • Raw tenbō points (no oka, no dividing)
      • Direct match result