Anyway, more extra regions today. I've always enjoyed playing with the geometry of Sudoku grids by getting rows and columns interacting in more interesting ways than you get in a classic puzzle, and this puzzle illustrates that philosophy nicely. Sadly this one has lost quite a few of its teeth in trying to get a unique solution, but there's enough meat on this one to keep most of my Dearest Readers entertained for a while. If you'll excuse that horribly mixed metaphor. Enjoy!
#259 Extra Regions Sudoku – rated mediumAll puzzles © Tom Collyer 2009-13.