Suji: Difference between revisions

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(reorganize the page to (try to) make more sense. merge part of the intro and part of defense to "basic theory" section to explain why suji works)
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*[[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 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 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.


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 another 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.


==Intervals==
==Intervals==
The intervals for suji apply to any of the numbered suits.  Nine types of intervals are available.  For these examples, each of the three suits are used; but they apply to all of  In the following table, only the first two are examined.
The intervals for suji apply to any of the numbered suits.  Nine types of intervals are available.  For these examples, only 1 suit is used per interval, but all intervals apply to every suit.


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