Author Archives: djape
By djape
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Published: November 19, 2005
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. […]
By djape
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Published: November 15, 2005
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 […]
By djape
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Published: November 14, 2005
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
| Tagged Classic Sudoku, Daily Sudoku, IQ, killer, killer sudoku, Killer Sudokus, Perfect Sudoku, solving technique, sudoku solving technique, swordfish, technique, x-wing
By djape
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Published: November 12, 2005
Ok thanks for all your comments to my post regarding the difficulty of some puzzles. I completely changed the rating system and created a large number of puzzles just to test it. As promised – I just posted an extra killer puzzle, rated (by the new rating system) as INSANE. It’s actually one of the […]
By djape
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Published: November 12, 2005
Samurai X for Saturday, November 12 – 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. […]
By djape
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Published: November 8, 2005
Here is another very special Sudoku puzzle. In fact, it’s not only one puzzle but rather six of them, although you cannot solve them separately. Instead, you must solve them in the given sequence, because in order to solve a puzzle, you must copy a few numbers from the previous one. So, the first puzzle […]
By djape
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Published: November 5, 2005
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 […]
By djape
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Published: November 5, 2005
Samurai X for Saturday, November 05 – 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. […]
By djape
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Published: November 4, 2005
Since it seems that this week’s brain X was a tricky one, today I didn’t post an INSANE puzzle, but rather just an IQ. It’s still quite difficult – maybe even more difficult than the brain X. I also posted a 4×4 classic Sudoku puzzle with another “shape” in it. It looks pretty I think. […]
By djape
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Published: November 2, 2005
Yesterday there was a post at blogs.guardian.co.uk about Killer Sudokus and a link to our site was posted. As a consequence, we’ve had some 600 referrals from that post within 12 hours (and overnight too)! I’d like to welcome our new visitors and to suggest them to go through the previous messages posted here – […]
Posted in General
| Tagged BOOK, Classic Sudoku, EASY, innie, INNIES, innies and outies, killer, killer sudoku, Killer Sudokus, outie, OUTIES, rules, solving tip, solving tips, sudoku book
