So in the midst of my triple posting last week, I managed to put out a completely broken Sudoku puzzle, where I’d presumably mistyped one of the digits. Looking back a bit later, I realised it was broken but couldn’t find the dodgy digit, so I went back and changed it.
Anyway, more Sudoku today. This weekend is the UKPA’s Sudoku championship
– and I have taken the liberty to put together an example of one of the featured Sudoku variants.
Incidentally, if you want to participate, UK citizen or otherwise, then you should definitely read the instruction booklet
and the discussion thread
. To actually take part in the test, you will have to be a registered member of the the UKPA
forums. Registration is free and easy
Anyhow, back to the variant. This one has the rather inelegant name of “No Donkey Step Sudoku” – perhaps when I have a free moment (haha) I’ll try and think of something better. Anyhow, the idea is fairly simple. Classic Sudoku rules as you know and love them, with the additional constraint that digits may not repeat within 2 cells on a diagonal line at 45 degrees. If you are familiar with no-touch sudoku, then this is simply a slight extension of the constraint. If you still don’t get it, have a look at my good friend Rishi Puri’s example
, which has the advantage of coming with a solution grid. Enjoy!
#136 No Donkey Step Sudoku – rated medium
All puzzles © Tom Collyer 2009-11