All 1 entries tagged Sudoku
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January 30, 2007
I’m sitting at the back of metric spaces and I’m bored. So what do I do? Why the Sudoku from this weeks Boar!
After a few minutes I realise something seems very familiar about this Sudoku…I still have my old copy of last weeks Boar in my bag, so I check it and sure enough it is the same Sudoku! Which I couldn’t solve last week…bummer.
Still, I try it again, I get the idea that a clean start will help me out, so I resist the temptation to just jump to where I was before. And sure enough after a while I look over and notice I have got a bit further. But I soon get stuck again and despite a lot of checking I can’t see any other moves.
Now I consider myself pretty decent at Sudoku, so I wasn’t going to let this defeat me (read: stubborn). But it just seemed there wasn’t enough information there. So I got out my old copy from last week and just tried guessing a few numbers. Much to my shock, I worked it through and I got a solution, which when checked seemed to work. Finally I thought, and got back to my notes.
However after a while I start to think, surely I couldn’t have been that lucky, I’d had to make about 3 guesses for it to drop out. So I tried drawing out another grid, and this time made a few different guesses. I followed it through and got another different solution. And then another one. I guess it is non-unqiue then.
Posted below are 3 of my solutions, along with the furthest I managed to get following it through logically. The numbers in black are those initially given, the numbers in red the ones added in.
Sort it out the Boar. I need Sudoku’s I can solve quickly so I don’t spend ages fiddling around finding numerous solutions and creating blog entries about it when I should be working!