The Law of Leftovers (LOL)

I promised to explain this technique, which applies to Jigsaw Sudoku (aka irregular blocks) puzzles, a while ago, so it’s time to keep the promise. You can find the same technique explained on various other sites, too. This technique is…

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Computer-generated Hanjie puzzle

I have just implemented a random Hanjie puzzle generator. It generates valid Hanjie (griddlers, pic-a-pix) puzzles but with random patterns – there is no pretty picture in the end! So, if you just like solving Hanjies and don’t care about…

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