Tag Archives: x-wing

Diagonal Sudoku Samurai

Diagonal Samurai Sudoku X for New Year’s Day – this is the only place you can find these kind of Sudoku puzzles! Warning: Today’s puzzle is the MOST difficult Samurai X yet! Basically, not only do you have to fight against 5 interconnected Sudokus, but you also need to be carefull about the diagonals: ALL […]
Posted in Free sample puzzles, Samurai sudoku | Also tagged , , , , , , , , , , | 5 Responses

No Samurai X today! (again!?)

Instead, a very similar yet different variation – 4 puzzles in an X-Ring. This is not to be confused with the X-Wing solving technique! X-Ring for Saturday, December 03 – this is the only place you can find these kind of Sudoku puzzles! Basically, not only do you have to fight against 4 interconnected Sudokus, […]
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Diagonal Sudoku Wing X

Instead, a very similar yet different variation – the true Wing X. This is not to be confused with the X-Wing solving technique! Wing X for Saturday, November 26 – this is the only place you can find these kind of Sudoku puzzles! Basically, not only do you have to fight against 5 interconnected Sudokus, […]
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More Swordfish

I posted another classic Sudoku that requires Swordfish/X-Wing solving technique. You should practice this technique because at some stage I might post a Killer Sudoku that will require you to use this technique to solve the puzzle. Maybe. 🙂 Of course I also posted another Killer – it’s a Brain X. Have fun.
Posted in Killer Sudoku | Also tagged , , , , , , , | 2 Responses

X-Wing

UPDATE: I changed the image to reflect an actual X-Wing. As a matter of fact, this is the puzzle that I posted a couple of days ago under the “daily Sudoku” page. Here is a quick explanation for the “X-Wing” technique. Suppose you reach the following position and you can’t go any further: Tweet You […]
Posted in Solving tips | Also tagged , , , , | 29 Responses

Swordfish

As promised, I implemented the Swordfish classic Sudoku solving technique in my Perfect Sudoku software and generated a few puzzles. I just posted one of them on the Daily Sudoku page. However, I ran my generator and generated a couple of thousands Killer Sudokus and NONE of them required Swordfish, just as I speculated before. […]
Posted in Killer Sudoku, Solving tips | Also tagged , , , , , , , , , , | 8 Responses
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