Ever since I started posting “Killer” Sudokus I was unhappy for one reason: the puzzles posted did not meet one criteria that I was hoping they would fulfill – they were not perfect. Yes, I admit that. You might wonder why I say that. Two reasons: 1) September 27 puzzle. It required trial and error. [...]
Many people have asked about the Killer Sudoku posted on September 27th. I haven’t tried to solve this Killer by hand but it is very much possible that it requires either a lot of math (the technique that I call “cage/fence splitting”, which will be explained in the next few days) or that it cannot [...]
I suppose there are Sudoku games for cell phones out there, but are there any Killer Sudokus? I’ve been thinking about porting my Perfect Sudoku to cell phone platforms so you could enjoy these puzzles on the move. If I decide to go for it, it will take some time to implement since I’ve never [...]
This tip is probably the most important solving technique of Killer Sudoku, one that will save you a lot of time. It does involve some math, but very simple one. Basically, the whole story is that you have to bear in mind that 1+2+3+4+5+6+7+8+9 = 45. Very smart, huh? Well, maybe not so, but it’s [...]
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