The upshot of all that is that I wanted to write my own fairly challenging sudoku – but I find writing Sudoku puzzles (or at least good ones) to be a lot more challenging than other nikoli puzzle types. So, cutting my losses for now, I’ve instead tried my hand at Heyawake. You can find the rules to the puzzle here.
I probably ought to have introduced the puzzle to my blog with a nice gentle introduction – but instead I’ve gone with a sink-or-swim puzzle where you’ll have to do a bit of thinking about the rules and their implications.
#019 Heyawake – rated mediumAll puzzles © Tom Collyer 2009