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{{octave|align=right}} | {{octave|align=right}} | ||
Suji {{kana|筋}} is the principle of utilizing the "mahjong | Suji {{kana|筋}} is the principle of utilizing the "mahjong intervals". This applies to the numbered suits: [[souzu]], [[pinzu]], and [[manzu]]. While these three suits are numbered 1 through 9, the numbers may be arranged in a square fashion to determine the "intervals". The purpose is to deduce and/or determine tiles waiting via [[ryanmen|open]] [[machi|waits]]. | ||
==Intervals== | |||
The intervals for suji apply to any of the numbered suits. Nine types of intervals are available. For this example, pinzu are used: | |||
{| class="wikitable" | |||
|- | |||
!rowspan=2| Middle tiles !!rowspan=2| Waiting for !! Interval name | |||
|- | |||
|colspan=3|''Two-sided'', or ''[[Ryanmen]]'' | |||
|- | |||
| {{#mjt:23p}} || {{#mjt:14p}} || 1-4, or Iisuu {{kana|イースー}} | |||
|- | |||
| {{#mjt:34p}} || {{#mjt:25p}} || 2-5, or Ryanuu {{kana|リャンウー}} | |||
|- | |||
| {{#mjt:45p}} || {{#mjt:36p}} || 3-6, or Sabukou {{kana|サブロー}} | |||
|- | |||
| {{#mjt:56p}} || {{#mjt:47p}} || 4-7, or Suuchii {{kana|スーチー}} | |||
|- | |||
| {{#mjt:67p}} || {{#mjt:58p}} || 5-8, or Uubbaa {{kana|ウッパー}} | |||
|- | |||
| {{#mjt:78p}} || {{#mjt:69p}} || 6-9, or Roukyuu {{kana|ローキュー}} | |||
|- | |||
|colspan=3|''Three-sided'', or ''[[Ryanmenten]]'' | |||
| {{#mjt:23456p}} || {{#mjt:147p}} || 1-4-7, or Iisuuchii {{kana|イースーチー}} | |||
|- | |||
| {{#mjt:34567p}} || {{#mjt:258p}} || 2-5-8, or Ryanuubaa {{kana|リャンウッパー}} | |||
|- | |||
| {{#mjt:45678p}} || {{#mjt:369p}} || 3-6-9, or Sabukoukyuu {{kana|サブローキュー}} | |||
|} | |||
The left column shows tiles that may appear in a player's hand, while the middle tiles show the tiles needed in order to complete a needed [[mentsu|tile group]]. Finally, it is helpful to identify waiting tiles by association. In the case of these [[machi|waiting patterns]], if a hand is waiting for one tile, it is likely waiting for another tile in the interval. | |||
== Defense == | == Defense == | ||
Defending using suji essentially presumes a player to be utilizing either the wait pattern of [[ryanmen]], [[ryanmenten]], [[nobetan]], [[sanmentan]], or some other variation. Under the rule of [[furiten]], if a player discarded a waiting tile, then the player's ability to call "ron" is disabled. Therefore, certain tile discards may rule out certain mahjong | Defending using suji essentially presumes a player to be utilizing either the wait pattern of [[ryanmen]], [[ryanmenten]], [[nobetan]], [[sanmentan]], or some other variation. Under the rule of [[furiten]], if a player discarded a waiting tile, then the player's ability to call "ron" is disabled. Therefore, certain tile discards may rule out certain mahjong intervals. | ||
Of course, one should not be necessarily dependent on these intervals alone, as some waiting patterns are immune to suji. | |||
== Offense == | == Offense == | ||
[[Image:Suji Trap.png|right|thumb|5-pin discarded to indicate 2-pin or 8-pin as safe, when [http://tenhou.net/0/?log=2014081307gm-0089-0000-edd77642&tw=0 one is not].]] | [[Image:Suji Trap.png|right|thumb|5-pin discarded to indicate 2-pin or 8-pin as safe, when [http://tenhou.net/0/?log=2014081307gm-0089-0000-edd77642&tw=0 one is not].]] | ||
The strategy of suji may be used offensively. By utilizing suji in reverse, a player may use a tile within an "octave" to lure out a winning tile along the same "octave". This is commonly known as the "suji" | The strategy of suji may be used offensively. By utilizing suji in reverse, a player may use a tile within an "octave" to lure out a winning tile along the same "octave". This is commonly known as the "suji trap". | ||
== External links == | == External links == | ||