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Tag Archives: Perfect Sudoku
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, solving technique, sudoku solving technique, swordfish, technique, x-wing
8 Responses
Changes in difficulty level
I must let you know that I’ve been working on improving the part of my software that determines the difficulty of a puzzle. Therefore, for the puzzle that I will post in a few moments, if you try to open it in “Perfect Sudoku” software, you will get a different rating from what’s indicated in […]
New poll
I’m closing the Mobile phone poll. I’ve been so busy with other things so I’m not sure when will I get my head around implementing Perfect Sudoku for mobiles. Here are the results: Anyhow, here is the new poll – choose your preferred level of difficulty for our Killer puzzles. It will affect which puzzles […]
A few words about “Perfection”
Ever since I started posting “Killer” Sudokus I was unhappy for one reason: the puzzles posted did not meet one criteria that I was hoping they would fulfill – they were not perfect. Yes, I admit that. You might wonder why I say that. Two reasons: 1) September 27 puzzle. It required trial and error. […]
Posted in Killer Sudoku
Also tagged Classic Sudoku, killer, killer sudoku, Killer Sudokus, PERFECT
2 Responses
Complex innies/outies
One of our visitors (Phyllis) asked about the puzzle posted on October 13. Now, this puzzle definitely doesn’t need any trial and error to be solved – in fact it’s only rated as “thinker”. However, it requires a technique that in the new version of Perfect Sudoku will be called “complex innies/outies”. It is basically […]
Posted in Free sample puzzles, Solving tips
Also tagged innie, INNIES, IQ, outie, OUTIES, solving tip, solving tips, standard sudoku, technique, THINKER
3 Responses
Puzzle difficulty rating
As promised, I’ve implemented a difficulty rating system in my Perfect Sudoku software and from now on I will be publishing the level for each puzzle. I’d like to get some response from you on this – how do you rate these puzzles that I’ve been posting? Here is what I came up with. These […]
September 27 solved!? Or…
I’ve received a possible solution for September 27 puzzle using only minor trial and error from udosuk. Here are his comments. You can also download the images that he sent: Firstly, the first pic (dk0927a.png) shows the steps I last posted which narrows R[1,2]C7 to {25} and then some more… From there I’ve worked out […]
Samurai X
Another brand new Sudoku variation – Sudoku Samurai X (diagonal Samurai Sudoku) has arrived. As far as I know, this is a unique puzzle of this sort – correct me if I’m wrong. Only the visitors of this website have the privilege to download and solve it. Basically, not only do you have to fight […]
Posted in Free sample puzzles, Samurai sudoku
Also tagged IQ, samurai, Samurai Sudoku, Sudoku Samurai
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More daily puzzles
In addition to today’s 3×3 Killer Sudoku that you are already used to seeing here, I’ve posted another puzzle on the Daily Sudoku variants Puzzles page. It’s a standard Sudoku, although not a classic 3×3 but rather a 2×5 variation. All 10 digits are used (0-9) so it should be slightly more difficult than the […]
Posted in Killer Sudoku, Sudoku Variants
Also tagged Daily Sudoku, Daily Sudoku Variants, killer, killer sudoku, rules, standard sudoku, Sudoku Variant, Sudoku Variants, variant
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Was it too difficult?
Hmm, I might have overdone today’s puzzle… Maybe it was a little bit too hard? Any thoughts? Anyone solved it without using Perfect Sudoku? ANYONE? Anyhow, I promise tomorrow’s daily puzzle will be somewhat easier. Don’t give up! It’s a great game and it’s worth playing. Tommorrow I will also create an archive where you […]
