Suji: Difference between revisions

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try to make wait notion a bit more consistent
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==Basic Theory==
==Basic Theory==
*The most common type of wait is an [[ryanmen|open]] [[wait]] (i.e. a [[ryanmen]] wait). An open wait is a wait that wins off two sides of a sequence, e.g. {23} or {34}.
*The most common type of wait is an [[ryanmen|open]] [[wait]] (i.e. a [[ryanmen]] wait). An open wait is a wait that wins off two sides of a sequence, e.g. a hand containing {23}, or a hand containing {34}.
*[[Shuntsu|Sequences]] are comprised of three sequential tiles. Therefore, an open wait will win off two tiles that are 3-apart. For example, {23} can win off either a 1 or 4 of the same suit. {34} can win off 2 or 5 of the same suit. This continues until you get the intervals of: 1-4, 4-7, 2-5, 2-8, 3-6, and 3-9.
*[[Shuntsu|Sequences]] are comprised of three sequential tiles. Therefore, an open wait will win off two tiles that are 3-apart. For example, {23} can win off either a 1 or 4 of the same suit. {34} can win off 2 or 5 of the same suit. This continues until you get the intervals of: 1-4, 4-7, 2-5, 2-8, 3-6, and 3-9.
*Due to the [[furiten]] rule, if a player has previously discarded any tile they could have won off of, they cannot win from other players.
*Due to the [[furiten]] rule, if a player has previously discarded any tile they could have won off of, they cannot win from other players.
*This makes suji helpful. Take the 1-4 interval. If an opponent discards a 4, then the 1 of the same suit becomes safer against them. This is because an opponent cannot win off a 1-4 open wait. If they happened to have a 1-4 wait, it would be subject to furiten, and thus they couldn't win off your 1 discard. Similarly, the 7 also becomes safer when a 4 is discarded, due to the 4-7 interval.
*This makes suji helpful. Take the 1-4 interval. If an opponent discards a 4, then the 1 of the same suit becomes safer against them. This is because an opponent cannot win off the 1-4 interval. If they happened to have a wait that completes from a 1-4 interval, such as {23}, it would be subject to furiten. Thus they couldn't win off your 1 discard. Similarly, the 7 also becomes safer when a 4 is discarded, due to the 4-7 interval.


Note: suji also applies to the other forms of furiten. After an opponent declares [[riichi]], then any non-winning tile discarded by anyone becomes safe. Therefore, suji can be applied to these tiles as well. If an opponent declares riichi, and the next opponent discards a 4, then 1 and 7 are still considered suji.
Note: suji also applies to the other forms of furiten. After an opponent declares [[riichi]], then any non-winning tile discarded by anyone becomes safe. Therefore, suji can be applied to these tiles as well. If an opponent declares riichi, and the next opponent discards a 4, then 1 and 7 are still considered suji.
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