Suji: Difference between revisions

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remove the sanmenchan wait patterns, since they aren't *really* relevant for suji. also remove the JP names (more confusing than anything)
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(remove the sanmenchan wait patterns, since they aren't *really* relevant for suji. also remove the JP names (more confusing than anything))
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{{Mahjong intervals|caption=Read the numbers across.}}
{{Mahjong intervals|caption=Read the numbers across.}}


'''Suji''' {{kana|筋}} is a [[defense|defensive]] tactic that uses [[discard]]s and the [[furiten]] rule to determine which tiles are safer against a specific opponent. Suji only applies to number tiles ([[manzu]], [[pinzu]], [[souzu]]).
'''Suji''' {{kana|筋}} is a [[defense|defensive]] tactic that uses [[discard]]s and the [[furiten]] rule to determine which tiles are safer against a specific opponent. It only applies to number tiles ([[manzu]], [[pinzu]], [[souzu]]).


Suji relies on the "mahjong intervals" of 1-4-7, 2-5-8, and 3-6-9, as shown in the picture to the right. When using suji, two numbers in an interval will be paired, such as 1-4 or 2-5.
Suji relies on the "mahjong intervals" of 1-4-7, 2-5-8, and 3-6-9, as shown in the picture to the right. When using suji, two numbers in an interval will be paired, such as 1-4 or 2-5.


==Basic Theory==
==Basic Theory==
In short: a tile becomes safer against an opponent if they've discarded every possible tile (of the same suit) that is in an interval of 3 from that tile. For example, if an opponent had discarded a 4, then both 1 and 7 of the same suit are safer. If an opponent discarded both 1 and 7, then the 4 becomes safer. (If an opponent had only discarded a 1, the 4 is not much safer.)
In short: a tile becomes safer against an opponent ''if'' they've discarded every possible tile (of the same suit) that is in an interval of 3 from that tile. For example, if an opponent had discarded a 4, then both 1 and 7 of the same suit are safer. If an opponent discarded both 1 and 7, then the 4 becomes safer. (If an opponent had only discarded a 1, the 4 is not much safer.)


The explanation is as follows:
The explanation is as follows:
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==Intervals==
==Intervals==
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.
There are 6 distinct suji intervals per suit.


{| class="wikitable" width=100%
{| class="wikitable" width=50%
|-
|-
!width=20%| Middle tiles !!width=10%| Waiting for !!width=30%| Interval name !!width=40%| Completion
!Middle tiles !! Waiting for !! Completion
|-
|-
|colspan=4 align=center|''Two-sided'', or ''[[Ryanmen]]''
| {{#mjt:23p}} || {{#mjt:14p}} || {{#mjt:123p}} or {{#mjt:234p}}
|-
|-
| {{#mjt:23p}} || {{#mjt:14p}} || 1-4, or Iisuu {{kana|イースー}} || {{#mjt:123p}} or {{#mjt:234p}}  
| {{#mjt:34m}} || {{#mjt:25m}} || {{#mjt:234m}} or {{#mjt:345m}}
|-
|-
| {{#mjt:34m}} || {{#mjt:25m}} || 2-5, or Ryanuu {{kana|リャンウー}} || {{#mjt:234m}} or {{#mjt:345m}}
| {{#mjt:45s}} || {{#mjt:36s}} || {{#mjt:345s}} or {{#mjt:456s}}
|-
|-
| {{#mjt:45s}} || {{#mjt:36s}} || 3-6, or Saburou {{kana|サブロー}} || {{#mjt:345s}} or {{#mjt:456s}}
| {{#mjt:56p}} || {{#mjt:47p}} || {{#mjt:456p}} or {{#mjt:567p}}  
|-
|-
| {{#mjt:56p}} || {{#mjt:47p}} || 4-7, or Suuchii {{kana|スーチー}} || {{#mjt:456p}} or {{#mjt:567p}}  
| {{#mjt:67m}} || {{#mjt:58m}} || {{#mjt:567m}} or {{#mjt:678m}}
|-
|-
| {{#mjt:67m}} || {{#mjt:58m}} || 5-8, or Uuppaa {{kana|ウッパー}} || {{#mjt:567m}} or {{#mjt:678m}}
| {{#mjt:78s}} || {{#mjt:69s}} || {{#mjt:678s}} or {{#mjt:789s}}
|-
| {{#mjt:78s}} || {{#mjt:69s}} || 6-9, or Roukyuu {{kana|ローキュー}} || {{#mjt:678s}} or {{#mjt:789s}}
|-
|colspan=4 align=center|''Three-sided'', or ''[[Ryanmenten]]''
|-
| {{#mjt:23456p}} || {{#mjt:147p}} || 1-4-7, or Iisuuchii {{kana|イースーチー}} || {{#mjt:123p}} and {{#mjt:456p}}<br>OR<br>{{#mjt:234p}} and {{#mjt:456p}}<br>OR<br>{{#mjt:234p}} and {{#mjt:567p}}
|-
| {{#mjt:34567m}} || {{#mjt:258m}} || 2-5-8, or Ryanuuppaa {{kana|リャンウッパー}} || {{#mjt:234m}} and {{#mjt:567m}}<br>OR<br>{{#mjt:345m}} and {{#mjt:567m}}<br>OR<br>{{#mjt:345m}} and {{#mjt:678m}}
|-
| {{#mjt:45678s}} || {{#mjt:369s}} || 3-6-9, or Saburoukyuu {{kana|サブローキュー}} || {{#mjt:345s}} and {{#mjt:678s}}<br>OR<br>{{#mjt:456s}} and {{#mjt:678s}}<br>OR<br>{{#mjt:456s}} and {{#mjt:789s}}
|}
|}


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]]. The recognition makes it 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.  Even if these take on Japanese names, they are simply the numbers.  Finally, the end result shows the the waiting tiles as the completed tile grouping(s).
The left column shows tiles that could be in the player's hand, while the middle column shows the tiles needed in order to complete that [[tile group]]. If a hand is waiting for one tile, it is likely waiting for another tile in the suji interval.


===Nakasuji===
===Nakasuji===
'''Nakasuji''' {{kana|中筋}} is literally the "middle suji".  In other words, given the three different intervals, they are the middle numbers of 4, 5, and 6.
'''Nakasuji''' {{kana|中筋}} is literally the "middle suji"; it refers to a 4/5/6 tile that has both of its "suji"


== Defense ==
== Defense ==
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