Japanese mahjong: Difference between revisions

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===Claiming discards===
===Claiming discards===
For each '''immediate''' discard, players have the option to make claims on discarded tiles based on the following conditions:
{{main|Naki}}


* This may sound silly, but a player cannot claim his/her own discard.
As part of the game, players have the ability to claim other player's discards.
* For all claims, a player must have 2 out of the 3 tiles in the hand necessary to form a complete meld. See Melds.
* Discard claims must be made immediately after discard, and before the next player's turn. Otherwise, a discarded tile remains in the discard pile and may not be claimed.
* Players reveal their two tiles and append the claimed tile. Then these three revealed tiles are placed to the right corner of the player's area.
* The claimed tile must be arranged sideways to indicate the claim. In addition, the claimed tile must be arranged on the left, middle, or right to indicate the source of the claim.
* To claim and complete '''sequences''', the player to the right of the discarder may claim the tile and call ''chii''. This means, any player calling ''chii'' may only claim tiles from the player to the left. However, this call has one limit.


::Some scenarios may involve a player with a closed completed sequence in the hand, like {{Tile|2pin}}{{Tile|3pin}}{{Tile|4pin}}; and the player to the left drops a {{Tile|1pin}} or {{Tile|5pin}}. In this case, the player may call ''chii'' on the discarded tile, to make an open 1-2-3 or 3-4-5 sequence. This results in the existing sequence being broken by the ''chii'' call. The remainder of the previously closed sequence cannot be discarded. So, if the 1 is picked up, then the player cannot drop the 4. Likewise, if the 5 is picked up, then the 2 cannot be discarded.
Finally, a hand is distinguishable between an '''open hand''' and '''closed hand'''. A closed hand is a player's hand, that had yet to make any claim on a discard. A hand in this state is fully concealed from the other players. In the event a player makes a claim on a discard, then the player's hand changes from a closed hand to an open hand.  


* To claim and complete '''triplets''', any player may claim the tile and call ''pon''.
Usually, a player's hand value decreases in the event of an open hand, but this may not always be the case, especially for some ''yakuman'' hands. Japanese mahjong strategy centers on knowing when to appropriately make the above calls. Knowledge of the ''yaku'' plays a large part in this decision making process.
* A player may also complete '''quads'''. Like ''pon'', any player may call ''kan''. This is applicable when a player already has a triplet in the hand, and wishes to claim a 4th.
* If the discarded tile completes a hand, then any player may call ''ron''.
 
Finally, a hand is distinguishable between an '''open hand''' and '''closed hand'''. A closed hand composed of a player's hand, who had yet to make any claim on a discard. A hand in this state is fully concealed from the other players. In the event a player makes a claim on a discard, then the player's hand changes from a closed hand to an open hand. Usually, a player's hand value decreases in the event of an open hand, but this may not always be the case, especially for some ''yakuman'' hands. Japanese mahjong strategy centers on knowing when to appropriately make the above calls. Knowledge of the ''yaku'' plays a large part in this decision making process.


===Mentsu===
===Mentsu===
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