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The Shikaku Room

Frequently Asked Questions

What is a Shikaku Puzzle?

Is there a Google gadget I can put on my igoogle page or other?

Does a Shikaku Puzzle have a unique solution?

What size is a Shikaku puzzle?

How to I solve a Shikaku puzzle?

What does the word Shikaku mean?

Why did you write this website?

Do you welcome feedback?

How does the solver work?

 

What is a Shikaku Puzzle?

Shikaku is normally played on a rectangular grid. Some of the squares in the grid are numbered. The objective is to divide the grid into rectangular and square sections such that each section contains exactly one number, that number representing the area of the rectangle or square. You can play a game by going to the home page.

 

Can I make a Google gadget or something similar that uses this website?

Yes, you can use the folloing url from "add gadget by url" http://www.shikakuroom.com/shikaku.xml

 

Does a Shikaku Puzzle have a unique solution?

Unlike a Sudoku puzzle, it is quite common for a Shikaku puzzle to have more than one solution.

 

What size is a Shikaku puzzle?

Shikaku puzzles can be rectangular, square or irregular shapes of any size with an area of two or more.

 

How to I solve a Shikaku puzzle?

Have a look at the How to Play section of this website.

 

What does the word Shikaku mean?

"Shikaku ni kire" is Japanese for "Being cut off to square" or "divide by squares" and is often referred to as that (note that rectangles are also valid).

 

Why did you write this website?

I enjoy writing programs that solve puzzles, and it has also fitted in well with a Computer-Science degree at Loughborough University.

 

Do you welcome feedback?

Yes, on the way that the site works, as well as comments on the content. Please visit the contact page.

 

How does the solver work?

On a basic level, the solver uses similar logic to that shown on the How to Play page. However there is an added level of complexity that I use to speed up solving called a Hilbert R-tree, Wikipedia gives a nice description http://en.wikipedia.org/wiki/Hilbert_R-tree

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