Double Kan-Chan ＞ Single Kan-Chan (The Basics pt04)

Check Mahjong No Jan-Ryu for the original article. 

*Translation of the original article start below*

"There are 2 types of Kan-Chan waits"

 Many people know that "Kan-Chan has more advantage than a Pen-Chan", but not too many beginners know that there are "2 types of Kan-Chan waits". 

[Double Kan-Chan has 2 Patterns]
3P and 5P -> Draw 2P and becomes 2P and 3P.  The other patter is
3P and 5P -> Draw 6P and becomes 5P and 6P. These are the 2 patterns.

[Single Kan-Chan has 1 Pattern]
1P and 3P -> Draw 4P and becomes 3P and 4P only, Even though it's a Kan-Chan, the possibilities are double!

On this site, we named a situation where either one of the Kan-Chan tiles can become a Riyan-Men wait as "Double Kan-Chan". We named a  Kan-Chan shape that can become a Riyan-Men on one side only is called "Single Kan-Chan". Obviously, "Double Kan-Chan" is more effective. 

"Are both tiles 3~7?"

If both of your Kan-Chan tiles are made from 3~7, they will become one of the three Double Kan-Chan shapes as seen in the image below.  

[There are 3 shapes of Double Kan-Chan]
3 and 5, 4 and 6, 5 and 7. These shapes consists of tiles from 3~7.

[There are 4 shapes of Single Kan Chan]
1 and 3, 2 and 4, 6 and 8, 7 and 9. 

There are 4 patterns for a Single Kan-Chan. You can also say that if the tiles consist of 1, 2,8 or 9 that it will become a Single Kan-Chan. 

Shapes made out of 2 tiles such as Riyan-Men, Kan-Chan and Pen-Chan are called Taa-Tsu, and a tile that is oded out by itself is called "Ko-Ritsu-Hai" (Direct translation is Lone Tile). Next time, we will be focusing on Ko-Ritsu-Hai.