Finally I joined in Steemit! After a week I applied to sign up, I got an email with my password. So glad!  I've actually had thousand things I want to post. But today I'd like to introduce a puzzle called 'Spink'. Before I introduce this, I think it's better to introduce myself. I'm a kind of all-round player, which means I can setup many things like toilets, electrical wiring, water pipe, etc. I also design many things and wring some books. So, what do I do for a living? I think I'm close to a inventor. Well, it sounds like a liar in South Korea but it is not true.  Anyway, let's get started.    
## What is Spink puzzle?
Spink stands for 'Speak' and 'Think'. Spink puzzle was made for reflecting people's thinking. When I was  making this, I also made a game of it. Recently I found that it is quite  similar to Blockchain. I'll be glad if you're interested in this.
## Rules
*  Use only  1, 2 and 3
*  Only cells in the  same row or column affect each other's numbers as follows:
  1. The same  numbers make the same number :
1 @ 1 = 1
2 @ 2 = 2
3 @ 3 = 3  
  1. Different numbers make another number : 
1 @ 2 = 3
2 @ 3 = 1
3 @ 1 = 2  

![spink01.png](https://steemitimages.com/DQmZieirpThpHsFaSYT4JPMQrme7apbPnKUmx5z7QcXYHFF/spink01.png)

> Red : 3, Grey: 2, Yellow: 2

It's so easy, you don't even have to remember it hard. 

### Let's take a look another quiz.  


![spink02.PNG](https://steemitimages.com/DQmNgzLEg2gexZwNyXCFpGRHBq455B6chDC3QaxUr77bxGL/spink02.PNG)

You may feel hard to guess the answers but if you pay a little attention, you will start to see something. The order and the method of the solution may be different, but the answer is always same. 

![spink03.PNG](https://steemitimages.com/DQmfKFFK1PmMLSxSh25toXYz9euwk87xsQPoF7wD9kVyXCj/spink03.PNG)

The above rules and the solution will help you understand how the rules are being applied. Please fill in the remaining blanks :)   
It seems too easy, huh? But **one more rule** is left, which will make you freak out.     
In the meantime, I'm gonna let you know the terms first.

## Spink unit, Cells and Core  

![spink04.PNG](https://steemitimages.com/DQmQUScWiphsFAH3E4ZLkK72vWP2yxrKJxdneJyPG3U9KM5/spink04.PNG)

  The twelve sided shape is called _Spink unit_, the outer divided parts are called _Cells_ and the center circle is _Core._ That Cells can be separated more than three, which means difficulty can be controlled. So, what is the additional rule?   

* The number on the Core means the sum of the numbers on each Cells.

If there are 3 Cells, the minimum value of the Core will be 3 (If all Cells have 1) and the maximum value will be 9 (If all Cells have 3). Similarly, if there are 4 Cells, the minimum value of the Core will be 4 (all have 1) and the maximum value will be 12 (all have 3).

They show how it works.  
![spink05.PNG](https://steemitimages.com/DQmXZwrJnZpxoumGrXvJ2YUuMNWJgDuMWstLqeHpyukAUGw/spink05.PNG)

![spink06.PNG](https://steemitimages.com/DQmXz4swXbYp2kttWRKkwrsVBw3zyYoLc2xEoGLHj1FSPv6/spink06.PNG)

  Is there anybody read all above?  Let me show you a practice.  
![spink07.PNG](https://steemitimages.com/DQmbYUZM4vC7quHZ4fQ679tNtKyJmeV8v4k89JhBDHMJdjN/spink07.PNG)
  I’ll give you the answer on next post. Well, I actually wanted to post about blockchain for the first post, but I though this’s better. Haha.. Hope to see you again!