Puzzle #38 – Masyu and Yin Yang

Sorry for the long absence, but I think I have more free time now. Inspired by the puzzles from Grandmaster Puzzles last week, I have created a puzzle that can be solved both as a Masyu and as a Yin Yang. As it turns out, this is a bit problematic to construct, as the density of clues required for the two puzzle types are different.

Thanks to Craig for pointing out that the first version of the puzzle is not unique. This has now been fixed.

Masyu Rules
Yin Yang Rules

Puzzle #38 - Masyu

Masyu Solution
Yin Yang Solution

Puzzle #37 – Haido

Haido is an interesting variation on the Skyscrapers puzzle type that I hadn’t come across until recently.  I decided to explore this new-to-me type a little further in the way that puzzle makers do – by making one.

I expect this puzzle should not be especially hard, even if you’ve never solved a Haido before, but if you dislike the difficulty rating I’ve given it, feel free to grouse about it in the comments.


Puzzle #37 - Haido


2014 US Puzzle Championship coming this weekend

The 2014 US Puzzle Championship is happening this coming weekend, on May 17th, 2014, just two short weeks after the US Sudoku Championship.  Both of these championships came early this year, presumably due to a relatively early World Puzzle Championships date.

If you’re interested in participating, head on over to http://wpc.puzzles.com/uspc2014/ to register, and for further information about participating.

Note that the instructions and the encrypted test PDF are scheduled to appear on Friday, May 16th, so if you’re wondering what this year’s challenges are, or if you’re hoping to get some practice in on puzzle types which will be on the test, you still have a few days to wait.