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Tag Archives: technique
Merry Christmas! :)
Merry Christmas to all that will celebrate it on December 25 and happy holidays to everyone else :). I uploaded the most difficult puzzle yet for this occassion – it’s a Killer Samurai X. It’s not difficult because it’s an “X” but because you do need to apply all the difficult solving techniques that you […]
Posted in General, Samurai sudoku
Also tagged IQ, killer, Killer Samurai, Merry Christmas, Mini Killer Samurai, New Year, samurai, solving technique, UPDATE
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Mini Killer Samurai!
This is another world-premiere puzzle – 2×2 Killer Samurai! So, you only use numbers 1-4 and everything else is the same as usual. If your kids are struggling with “big” Killers, give them this one so they could learn the solving techniques etc. But first make sure YOU are able to solve it! 🙂 Click […]
Posted in Free sample puzzles, Samurai sudoku
Also tagged IQ, killer, Killer Samurai, Mini Killer Samurai, samurai, solving technique
4 Responses
Twin Nonets
Lets formalize the technique that can be used when solving overlapping puzzles, which I have been referring to as “the new solving technique” and that I now call Twin Nonets. Basically, this technique is a sub-technique (or if you like – a consequence) of the naked/hidden triplets technique that you are all probably aware of. […]
Posted in Solving tips
Also tagged Butterfly Sudoku, Double Sudoku, Double Trouble, EASY, Flower Sudoku, IQ, samurai, solving technique, Twin Nonets
12 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, […]
Posted in Free sample puzzles, Samurai sudoku
Also tagged IQ, samurai, solving technique, x-wing
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Triple X
Another overlapping sudoku variant – now with 3 Sudoku X puzzles. Warning: This puzzle is quite difficult even that it can be solved using only basic sudoku solving techniques. You must work on all three puzzles in order to get the solution. Also, I think you might get confused about the “fourth” puzzle which you […]
Posted in Free sample puzzles, Sudoku Variants
Also tagged Diagonal Sudoku, IQ, overlapping sudoku, solving technique, sudoku solving technique, Sudoku Variant, sudoku x, Twin Nonets, variant
15 Responses
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, […]
Posted in Free sample puzzles, Samurai sudoku
Also tagged Diagonal Sudoku, IQ, solving technique, x-wing
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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 BRAIN, Classic Sudoku, IQ, killer, killer sudoku, solving technique, swordfish, x-wing
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: You look […]
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 Classic Sudoku, Daily Sudoku, IQ, killer, killer sudoku, Killer Sudokus, Perfect Sudoku, solving technique, sudoku solving technique, swordfish, x-wing
8 Responses
Subtraction combo
Udosuk, one of our visitors who is most active in giving hints for the puzzles we post here, has made a suggestion for a new solving technique for Killer Puzzles. He calls it “subtraction combo”. I’m posting his explanation here (slightly modified): I’m proposing a trick which I think many players already knew, but I’ll […]
Posted in Solving tips
Also tagged calculator, IQ, killer, solving technique, subtraction combo
3 Responses
