![]() If all four of those boxes are either 5 or 6 then this is an illegal puzzle. In looking for pairs we have two blocks with 5 and 6. This Uniqueness method can be demonstrated with Websudoku's Evil Puzzle #7,645,498,690.įirst we get some preliminary numbers out of the way: NOTE: This method does not work on Killer or Killer-variant Sudoku puzzles because the numbers are also related mathematically due to the cages. ![]() No other site ever explained this, and when I sent it to the guy with the former Numbah Wun sudoku strategy site, he gave me nothing but a "Pish and tosh". However, there's a rule I came up with a year ago which I call "Uniqueness". I don't use strategies such as "Advanced cross-hatching", "X-wing", "Swordfish" and the like to me they're obvious and nothing more than long names and descriptions for what I already do: scan numbers in rows and columns and when those are all set, start looking for pairs and triplets. Luckily, Berti hates smoke and so avoids the smoking room which means I'm not subject to his opinions on how the puzzles work. I've done so many that I can do most puzzles at the hardest level in under 10 minutes. I do 'em in the train to and from work as well. When it's time for this monkey to have a smoke, I usually take a sudoku puzzle with me. I can't sit in the Cube at the Desk of Hate all day long.
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