Riyan-Kan and Continuity of Tiles (The Basics pt06)

Check Mahjong No Jan-Ryu for the original article. 

*Translation of the original article start below*

 

Now let’s look at a Riyan-Kan (double Kan-Chan) situation.

"Same Amount of Uke-Ire Tiles as Riyan-Men"

 

As a basic Mahjong strategy, a Riyan-Men has 2 types and 8 tiles as your Uke-Ire, but the Riyal-Kan that we will introduce this time will also have the same 2 types and 8 tiles as your Use-Ire. (Since you have 2 Kan-Chans, so that is why it is called Riyan-Kan)

 [Riyan-Kan] Uke-Ire Tiles are 2 Type, 8 Tiles  1P 3P 5P … Wait is 2P and 4P 2P 4P 6P … Wait is 3P and 5P 3P 5P 7P … Wait is 4P and 6P 4P 6P 8P … Wait is 5P and 7P 5P 7P 9P … Wait is 6P and 8P

[Riyan-Kan] Uke-Ire Tiles are 2 Type, 8 Tiles

1P 3P 5P … Wait is 2P and 4P
2P 4P 6P … Wait is 3P and 5P
3P 5P 7P … Wait is 4P and 6P
4P 6P 8P … Wait is 5P and 7P
5P 7P 9P … Wait is 6P and 8P

A Riyan-Men uses 2 tiles and “2 types and 8 tiles“, and a Riyan-Kan uses 3 tiles and “2 types and 8 tiles”, so a Riyan-Men is more efficient, but it is important to understand that the Riyal-Kan wait also has a good Uke-Ire. Let’s try to remember that.


"Be Conscious of the Continuity of Tiles"

 

As seen in the image below, be conscious of a Riyan-Kan material made out of “4 skipping” tiles. 

 If a Ko-Ritsu-Hai is like this (ex “2 and 6” or “3 and 7” ) which is skipping 4 tiles in between, are considered as Riyan-Kan materials.  6M has the most Uke-Ire, and 2M 2P and 8S has the same value as an individual tile. But 2M can be come 2M 4M 6M, so keep it if you have a choice!

If a Ko-Ritsu-Hai is like this (ex “2 and 6” or “3 and 7” ) which is skipping 4 tiles in between, are considered as Riyan-Kan materials.

6M has the most Uke-Ire, and 2M 2P and 8S has the same value as an individual tile.
But 2M can be come 2M 4M 6M, so keep it if you have a choice!

So as you can see, it is important to be conscious of the continuity of tiles and not just the Uke-Ire tiles of an individual tile in Mahjong. If we look at a tile’s continuity in a different example…

 If you compare the 4 Ko-Ritsu-Hai… 4M has the most Uke-Ire. 1M 9P 1S has the same value as an individual tile. If you discard 1M and draw 2M or 3M, this will be considered as Ura-Meh (backfire), but if you have the 4M, you can still work around it. So in theory, discarding from 1 and 9 will be the best thing to do since you have a Suji tile.

If you compare the 4 Ko-Ritsu-Hai…
4M has the most Uke-Ire. 1M 9P 1S has the same value as an individual tile.
If you discard 1M and draw 2M or 3M, this will be considered as Ura-Meh (backfire), but if you have the 4M, you can still work around it. So in theory, discarding from 1 and 9 will be the best thing to do since you have a Suji tile.

This also comes up in a game fairly often, so let’s try to remember this.

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