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.
It is with great pleasure that I announce that two books with Perfect Sudoku puzzles have been printed and will reach bookshops very soon. I have hinted this before but it’s now official. Both books will be available in bookshops in Portugal only, thanks to Via Optima publishing house from Portugal. They will appear there [...]
I have another announcement to make – as of tomorrow – Friday, November 18, our Samurai puzzles will be published every Friday in Washington Express a free daily commuter newspaper that is published in Washington D.C.. It is highly likely that there will also be Killer Sudokus published in the same paper very soon So [...]
Samurai X for Saturday, November 19 – 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, but you also need to be carefull about the diagonals: ALL diagonals in the puzzle must contain one occurrence of each 1-9 digit. [...]
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: You look [...]
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