Showing posts with label Regional Yajilin. Show all posts
Showing posts with label Regional Yajilin. Show all posts

Monday, 31 December 2012

Puzzle #145: Regional Yajilin

The higher numbers are always a bit trickier to find genres for. Last year's Island puzzle was a rare spark of genius as a choice, in my opinion. This year it's a Regional Yajilin. I spend a while looking for a good opening for this genre with the number 8. A few options didn't really lead to any good puzzles, but I think this one really worked very well.
I'm really happy with how it turned out. It's probably a bit challenging, because people aren't as used to how the black squares can be placed in this genre.

8 - Regional Yajilin

Rules for Regional Yajilin


Click to enlarge

Sunday, 1 April 2012

Double Trouble #6: Heyawake (wacky) and Regional Yajilin

It's been a while since I have done one of these. I had been trying to play around with Ripple Effect/Heyawake and Ripple Effect/Regional Yajilin, except those never came off the ground much. It didn't feel that nice as I had to overload the Ripple Effect puzzles with uneccesary clues to get the other puzzles unique. So I thought that maybe Heyawake and Regional Yajilin might work as they can have a comparable amount of necessary clues. I found it a bit hard to make it work with rectangular regions, so I gave irregular reginos a try and that turned out a lot better. They're both not the hardest puzzles, but I like how they turned out.

Rules for Heyawake

Rules for Regional Yajilin

So firstly this puzzle have be solved as a Heyawake (wacky) puzzle. Opposed to normal Heyawake the puzzle has irregular rooms. The white area still can't span over two or more boundaries, even if they belong to the same room. This one is probably the easiest Heyawake on my blog.
Secondly it can be solved as a Regional Yajilin puzzle. It's not too hard, but it has some trickier steps than the Heyawake, but these are more because of the genre type.


Rules: Regional Yajilin

This genre was developed by Naoki Inaba.

Colour some squares, so that a single closed loop can be drawn through all remaining cells. The loop run horizontally and vertically through the centers of the cells. It can't touch or cross itself. No two black cells can share a border. The grid is split up into different regions. A number in a region indicates the amount of cells that need to be coloured in it.