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Following its incredible introduction to the world in the finals of the first sudoku world championships in 2006, the toroidal variant gets ...

Ok, so delayed a little later than Sunday. I’ve been busy. On the other hand, here’s a sudoku with the givens in the shape of a Yin-Yang. ...

Ok so this is getting a bit late now; on the other hand perhaps it’s not if you live in Hawaii. That’s the way it goes. This week’s offeri...

A.K.A. Friday Puzzles #1 Hello all. Recently I have taken up writing logic puzzles as an excellent means of wasting time – but also as ...

This time I had a co-solver, Giulia Franceschini of Italy. Like I say I normally get annoyed with people pointing stuff out to me whilst sol...