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{{Mahjong intervals|caption=Read the numbers across.}} | {{Mahjong intervals|caption=Read the numbers across.}} | ||
'''Suji''' {{kana|筋}} | '''Suji''' {{kana|筋}} involves the general inference of discarded tiles, when determining safe tiles. The term alone points towards 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]]. The intervals themselves are based on the three-tile [[shuntsu|sequential groupings]]. Tiles along the intervals mark needed tiles to complete particular sequences. Reading the numbers to the right across, the three main intervals are 1-4-7, 2-5-8, and 3-6-9. Naturally, numbers within each interval can be paired such as 1-4 and 2-5. Other references to suji are available, such as matagi suji and ura suji. | ||
==Intervals== | ==Intervals== | ||
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A common way for this to occur is when a player has a ryankan shape, such as 468. They can discard the 4 to wait on 7, which is suji of the 4. Other players who know about suji may see this and be more likely to discard the 7. This is part of the reason why the suji of the riichi tile is considered dangerous. | A common way for this to occur is when a player has a ryankan shape, such as 468. They can discard the 4 to wait on 7, which is suji of the 4. Other players who know about suji may see this and be more likely to discard the 7. This is part of the reason why the suji of the riichi tile is considered dangerous. | ||
== Other suji == | |||
=== Matagi suji === | |||
{{main|Matagi suji}} | |||
'''Matagi suji''' is a concept that considers suji based on middle tiles discarded from potential sequences. Given the discard timing, the individual tile may indicate suji intervals surrounding the tile. However, this read can be difficult given other information on the board. | |||
=== Musuji === | |||
=== Ura suji === | |||
== External links == | == External links == | ||