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.
Yin Yang Rules
Yin Yang Solution
The fifth round of the Puzzle Grand Prix is coming this weekend, from May 23-26. Those interested in competing for the World Puzzle Championship in August should participate, as we will be using Grand Prix result to select our team members. The competition can be found at http://www.gp.worldpuzzle.org/.
The U.S. Puzzle Championship is coming this weekend, on May 17, 1:00pm Eastern Standard Time. Those interested in competing for the World Puzzle Championship in August should participate, as the top scorers of the USPC are selected for the A-team. The competition can be found at http://wpc.puzzles.com/uspc2014/.
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.
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.
The fifth round of the Sudoku Grand Prix is coming this weekend, from May 9-12. Those interested in competing for the World Sudoku Championship in August should participate, as we will be using Grand Prix result to select our team members. The competition can be found at http://www.gp.worldpuzzle.org/.
This one is labelled hard mainly due to how weird it is to solve when compared to a normal nurikabe, instead of how hard it is in terms of straight up difficulty. That being said, this puzzle is by no means easy.