Suji: Difference between revisions

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Ura suji is a theory which suggests that: when a middle tile is discarded relatively early, unsafe suji intervals that are nearby become more dangerous. For example, say an opponent had a 35 [[kanchan]] in their hand. If a 2 is drawn, then 5 would be discarded from the "235", leaving just a 23 shape. The 23 waits on a 1 or 4, so if a 5 is discarded relatively early, then 1-4 becomes more dangerous.
Ura suji is a theory which suggests that: when a middle tile is discarded relatively early, unsafe suji intervals that are nearby become more dangerous. For example, say an opponent had a 35 [[kanchan]] in their hand. If a 2 is drawn, then 5 would be discarded from the "235", leaving just a 23 shape. The 23 waits on a 1 or 4, so if a 5 is discarded relatively early, then 1-4 becomes more dangerous.


According to ura suji:
*Discarded {{#mjt:4p}} makes {{#mjt:58p}} more dangerous.
*Discarded {{#mjt:4p}} makes {{#mjt:58p}} more dangerous.
*Discarded {{#mjt:6p}} makes {{#mjt:25p}} more dangerous.
*Discarded {{#mjt:6p}} makes {{#mjt:25p}} more dangerous.
*Discarded {{#mjt:5p}} makes {{#mjt:14p}} and {{#mjt:69p}} more dangerous.
*Discarded {{#mjt:5p}} makes {{#mjt:14p}} and {{#mjt:69p}} more dangerous.


In the modern day, ura suji is often disregarded. If an opponent discards 5-pin early, then declares riichi, then non-suji 4-pin would be a dangerous tile. However, a non-suji 4-man, 5-man, 4-sou, etc. would also be dangerous tiles. Therefore, knowing about ura suji would not change your behavior. If you were folding, you wouldn't discard any musuji unless you had to. If you were attacking, you would discard ura suji anyways, because an ura suji is not much more dangerous than a regular non-suji tile.
In the modern day, ura suji is often disregarded. If an opponent discards 5-pin early, then declares riichi, then non-suji 4-pin would be a dangerous tile. However, a non-suji 4-man, 5-man, 4-sou, etc. would also be dangerous tiles. Therefore, knowing about ura suji would not change your behavior.  
*If you were folding, you wouldn't discard any musuji unless you had to.  
*If you were attacking, you would discard ura suji anyways, because an ura suji is not that much more dangerous than a regular non-suji tile.
 
In addition, it assumes your opponent is going for maximum [[tile efficiency]], and it also assumes that the 35 kanchan had existed in the first place.


== External links ==
== External links ==
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