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Riichi Competition Rules



3.3.9 Fourth kong


If no-one wins on the discard after the fourth kong, the hand ends in abortive draw, except in the case where it’s same player who has all four kongs, in which case playing continues, but no further kongs may be declared.

3.3.10 Mahjong on a discard (ron)

A player who can form a valid mahjong hand with at least one yaku with the last discard, can win by clearly declaring ron or mahjong, unless he is furiten.

3.3.11 Mahjong on self-draw (tsumo)

A player who can form a valid mahjong hand with at least one yaku with a tile just drawn from the wall or the dead wall, can win by clearly declaring tsumo or mahjong. The player should keep the winning tile apart from the rest of the hand, so that it is clear to all players which was the winning tile. A player who is furiten can still win on self-draw.


3.3.12 Riichi

A player with a concealed waiting hand can declare riichi by clearly saying riichi, rotating the discarded tile sideways and paying 1000 points to the table by placing a stick by the discards. If an opponent claims the rotated discard for winning, the riichi declaration is invalid. If an opponent claims the rotated tile for a melded set, rotate your next discarded tile.

A player is not allowed to declare riichi if there are less than four tiles left in the wall.

The 1000 points goes back to the riichi declarer if he wins. If another is the winner of the current hand, he collects the 1000 points, and in case of a drawn game the riichi bet stays on the table to be claimed by the next player to win a hand.

A player who declared riichi can no longer change his hand. However, he may declare a concealed kong if a tile is drawn that matches a concealed pung, if this does not change the waiting pattern and if the three tiles to be konged can only be interpreted as a pung in the original riichi hand. (In case of three consecutive pungs in the same suit, no kong may be declared, since the tiles can be interpreted as three identical chows).

It is permissible for a player who is furiten to declare riichi. A player who after declaring riichi, chooses not to win on a discard that completes his hand, becomes furiten.

A player who is furiten can still win on self-draw.

Riichi is a yaku. A player who wins in the first go-around after the riichi declaration (including the player’s next draw) can claim an additional yaku for ippatsu. The ippatsu chance is lost if the go-around is broken by claims for kong, pung or chow, including concealed kongs.

A player who wins after declaring riichi, reveals the tiles underneath the dora indicator and any kan dora indicators. These tiles indicate ura dora which can be claimed only by players who declared riichi.

3.4 End of a hand

A hand can end in three ways: by exhaustive draw (no-one declares a win after the discard after the last tile), by abortive draw or by one or more players declaring a win.

3.4.1 Last tile

The last tile in the wall can only be claimed for a win, not for a kong, pung or chow. In case a kong is declared at the second-to-last tile, the replacement tile becomes the last tile.

3.4.2 Exhaustive draw

An exhaustive draw occurs if no-one declares a win after the discard after the last tile. The 14 tiles of the dead wall are not used. After an exhaustive draw the noten players (a player who can’t or won’t show a tenpai hand) pays a penalty to tenpai (waiting) players (players who show a tenpai (waiting) hand). The total noten penalty amounts to 3000 points. E.g. if three players are tenpai, the noten player pays 1000 to each, whereas if only one player is tenpai he receives 1000 points from each of the noten players. A player is not considered tenpai if he is waiting only for a tile of which he already has 4. A player is still considered tenpai if all his waiting tiles are visible among the discards and declared sets. Players who have declared riichi are obliged to show their tenpai hands in case of an exhaustive draw. After an exhaustive draw, a counter is placed on the table at East’s right-hand side.

3.4.3 Abortive draw

After an abortive draw no noten penalty is payed, and players who have declared riichi are not obliged to show their tenpai hands, except in case of four riichi declarations. After an abortive draw, a counter is placed on the table at East’s right-hand side. Abortive draw can occur in four ways:

  • A player who after his first draw in the uninterrupted first go-around has at least
  • nine different terminals and honours may declare an abortive draw.
  • No-one wins after the discard after the fourth kong, and the four kongs do not belong to the same player.

  • All players discard the same wind in the first uninterrupted go-around.
  • All four players have declared riichi, and no-one declares a win on the fourth player’s discard. All players are obliged to show their tenpai hands.
3.4.4 Handling riichi bets after drawn games

In case of a drawn game (whether by exhaustive draw or abortive draw), any riichi bets stay on the table to be claimed by the next player who declares a win. In case more than one player wins at the same time, the riichi bets go to the winner closest to the discarder’s right.

3.4.5 Furiten

If a waiting player can form a mahjong hand using one of his previous discards, he is furiten and is not allowed to claim a win on a discard, even if the hand completed with the previous discard is without a yaku.

A player who is furiten can choose to change his hand to avoid being furiten (except if he has declared riichi).

A player who is furiten, can still win on a self-drawn tile.

A player who fails to claim a win on a discard that completes a mahjong hand, is temporarily furiten, even if the passed tile gives him no yaku, and he cannot claim a win on a discard in the current go-around. If the go-around is interrupted by claims for kong, pung or chow, the player is no longer temporarily furiten. The state of temporary furiten always ends when the player draws a tile, i.e. no player is ever considered furiten on a self-drawn tile.

It is permissible for a player who is furiten to declare riichi. A player who after declaring riichi, chooses not to win on a discard that completes his hand, becomes furiten.

Furiten – example 1

If a waiting player can form a mahjong hand using one of his previous discards, he is furiten and is not allowed to claim a win on a discard, even if the hand completed with the previous discard is without a yaku.

Consider a player with the following hand:


   

The player has a three-sided wait for 3-6-9. The player is furiten if any of the three waiting tiles are among his discards.

Furiten – example 2

Consider a player with the following hand:


       

The player is waiting 1-4 circles. A discarded 7 circles does not make the player furiten. Only if one of the waiting tiles (1 or 4 circles) are among the discards is the player furiten.

Furiten – example 3
Consider a player with the following hand:


     

The player is waiting for three tiles: 4 and 7 circles and red dragon. If the player has discarded one of these tiles, he is furiten.


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