Matagi suji: Difference between revisions

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==Theory==
==Theory==
Matagi suji relies on the power of a shape like "233" or "334". When a player has a "233", it is unlikely for them to discard a 3 early - turning "233" -> "23" - since it'd come at a loss of [[tile efficiency]]. So if a 3 is discarded early, it is less likely for them to have "23" (which waits on 1-4) or "34" (which waits on 2-5) remaining. As the 1-4 wait and 2-5 wait are less likely, an early discarded 3 makes 1-4 and 2-5 safer. Note: tiles towards the outside of a discarded tile are ''much'' safer. Tiles towards the inside are not much safer than a regular tile.
Matagi suji relies on the power of a shape like "233" or "334". When a player has a "233", it is unlikely for them to discard a 3 early - turning "233" -> "23" - since it'd come at a loss of [[tile efficiency]]. So if a 3 is discarded early, it is less likely for them to have "23" (which waits on 1-4) or "34" (which waits on 2-5) remaining. As the 1-4 wait and 2-5 wait are less likely, an early discarded 3 makes 1-4 and 2-5 safer. Note: tiles towards the outside of a discarded tile are ''much'' safer; tiles towards the inside are not much safer than a regular tile.


Conversely, it is more likely for a player to keep shapes like "233" until [[tenpai]]. So if a 3 is discarded early, it is more likely for them to have a "23" or "34" remaining. This means an early discarded 3 makes 1-4 and 2-5 more dangerous.
Conversely, it is more likely for a player to keep shapes like "233" until [[tenpai]]. So if a 3 is discarded early, it is more likely for them to have a "23" or "34" remaining. This means an early discarded 3 makes 1-4 and 2-5 more dangerous.
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==External links==
==External links==
* [https://pathofhouou.blogspot.com/2020/08/analysis-ura-suji-and-matagi-suji.html Matagi suji data analysis]] on Path of Houou
* [https://pathofhouou.blogspot.com/2020/08/analysis-ura-suji-and-matagi-suji.html Matagi suji danger analysis] on Path of Houou
* [https://www.mahjonggem.com/blog/2019/6/12/matagi-suji Matagi suji] on Mahjong Gem
* [https://www.mahjonggem.com/blog/2019/6/12/matagi-suji Matagi suji] on Mahjong Gem
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