Code Of Conduct



  • These rules serve as a guide to players and Tournament Directors, in order to facilitate a fair competition. The Tournament Director has the final decision on all matters.
  • Players should obey the rules and compete in a fair manner, and should not violate any rules deliberately. Most penalties in these rules are meant to be applied to inadvertent violations; against deliberate violations the Tournament Director has the right to correct any irregularity, or to impose additional penalties.

General Code of Conduct


  • The player must not violate the spirit of a fair competition.
  • The player should always play to the best of one's ability. Collusion with another player (to the detriment of one's own results) is prohibited. Communicating the contents of one's hand (other than tiles which are legally exposed) to another player is prohibited.
  • When one is behind in score and has little hopes of advancement, one should still demonstrate sportsmanship and play to the best of one's ability, and should not recklessly discard tiles for the opponents to claim.
  • Any form of intentional cheating, such as (and not limited to) hiding tiles on one's body, illegal swapping of tiles, stacking the wall tiles in an unfair manner, or false reporting of scores, is strictly prohibited.
  • The player should not obstruct the smooth running of the competition. The player should obey the Tournament Directors' orders; any appeals should be filed civilly.



  • If the player believes that he has enough reason to dispute a Tournament Director's ruling, he may try to explain his reason on the spot.
  • If, after the above, the player still disagrees with the Tournament Director's ruling, he should not argue with the Tournament Director, but should file his case to the Tournament Director within 30 minutes after the end of the current session.
  • The Tournament Director has the final decision on all matters. Objections will not be entertained

Etiquette during Play


  • No chatting is allowed during the play of a hand, except for the required verbal announcements for claims. Please remember that claims must be verbally announced (same for win and kong declarations).
  • The players may make some brief comments or discussions in between hands, but they should not speak too loudly and disturb nearby games in progress.
  • While it is understandable that the shuffling of the tiles may be noisy, the players should not make unnecessary noise during the deal or the play by banging the tiles hard against the table.



  • After rotating tables, the player should not tell the results of his previous opponents to his new opponents, and he should not elaborate in detail his own previous results. Also, one should not ask such information of his opponents.

Collusion Vs. Tactical Alliance 


  • Each player should play for oneself, aiming to achieve the best score and ranking for oneself. One must not intentionally play to the detriment of one's results with the purpose of improving the results of a certain other player. This is called collusion, and is a serious offense punishable by disqualification and blacklisting.
  • During the play of a hand, the situation may arise that an opponent has developed a major threat of a high-scoring hand. In such case, sometimes it is to one's advantage to deliberately help another opponent win a small hand (even deliberately discarding the winning tile for the opponent), so as to escape the threat of the big hand. This strategy is called "Tactical Alliance", and is legally allowed because the purpose is to avoid a big loss for oneself, which is to one's own benefit.
  • There is also the case that, while an opponent is clearly threatening a big hand, one also has a big hand himself with a good chance of winning (already calling or close to calling). In this case, one may want to risk discarding dangerous tiles because he does not want to abandon his own big hand. This is considered legal risk-taking.
  • Even when the player has accumulated a negative score in the round, and is likely to be eliminated, he should still play to the best of his ability, and should not discard recklessly. Otherwise, the player may be penalized for collusion, regardless of whether he has arranged any illicit agreements with another player or not.