Andoku is a great, free Sudoku app that goes well beyond the ordinary 9-by-9 logic puzzle. I'm partial to puzzles, and this one has a lot of flexibility: irregularly shaped subdomains instead of just the 3-by-3 squares, extra regions such as the diagonal X that also need the numbers 1 through 9, and the hardest of all in my opinion, the color Sudoko. Here, there are nine colors scattered across the grid, each with nine squares, and each color needs the numbers 1 through 9.
There are 200 puzzles of each combination, ranging across five difficulty levels. I figure by the time I've finished a fraction of any of those, I'll have forgotten the first ones. As an added bonus, there's a night mode so you can work on puzzles during moments of insomnia without annoying your spouse.
I was tempted to put another puzzle I like here instead, MathDoku. It's a version of the KenKen puzzles I really like for their use of math as well as logic. But its user interface is just a bit too clunky for me. There's also an Andoku 2, but I'm not convinced of its merit: it doesn't offer all the combinations of squiggly layout with the hyper, X, color, or percent regions.
July 13, 2011 3:55 AM PDT
Photo by: Android Market
| Caption by: Stephen Shankland
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