COPENHAGEN - The Revised EMA riichi rules are ready. The rules will go into effect April 1, 2016.

The rules are available in a preliminary document while further layout and graphics is made in collaboration with Sheila Hansen who also designed the front page.

Download the new rulebook

The document is available for download here.

The main changes since the 2012 edition

  • Red fives have been removed.
  • Tanyao (All Simples) can be an open hand.
  • Renho (Blessing of Man) is a mangan, not a yakuman.
  • Dai suushii (Big Four Winds) is a yakuman, not a double yakuman.
  • A hand with 13+ fan is scored as a sanbaiman, not a yakuman.
  • The 3 second timing rule is removed.
  • Swap-calling is not allowed.
  • Temporary furiten ends when the player draws or claims a tile.
  • Five counters implies two yaku: the rule is removed.
  • Abortive draws are not allowed.
  • Nagashi Mangan is not allowed.
  • Uma is changed to 15,000/5,000/-5,000/-15,000.
  • Chombo penalty in a tournament is 20,000 points deduction after uma.
  • Penalty rules are slightly more lenient in some cases.

Differences from World Championship Rules 2015

  • Multiple ron are allowed.
  • 4-30 is not rounded to mangan payment.
  • Pungs do not have to be nearly simultaneous in order to take precedence over chows.
  • Riichi bets left on the table at the end of a match go to the winner.

In line

Motivation for the rule changes is to be in line with modern style riichi as it played in competion riichi in Japan, and the World Riichi Championship 2015 rules have been the main inspiration.

The devaluation of Renhou and 13+ han hand is for the same reason as previous removal of accumulative and double yakuman: hands that are very valuable skew tournament results from skill towards luck, and should be avoided in tournament play.
The chombo payment of 20,000 after uma is quite close to paying a reverse mangan to the opponents immediately, maybe event sligthly cheaper. The reverse mangan would often equivalate dropping one or even two positions at the table, that's at least 10,000 points on top of the 8,000 or 12,000 paid for the mangan. The reverse mangan is paid to the opponents who benefit from the mistake, and the dealer gets a larger benefit. This is now avoided.
The abortive draws and Nagashi Mangan were the most difficult rules to consider. People have strong feeling both for and against Nagashi Mangan in particular. It seemed the split for/against were very close to 50/50, and in the end we just had to make a decision. These decisions cannot be strictly objective and well-argued, because in the end it comes down to preferences. In the stalemate circumstances I suggested to use the WRC rules as a guideline.


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