This is the archive of the old posts from Djape .Net, more or less as they used to be. Please go to djape.net to see the new website.

Tag Archives: Killer Sudokus

Perfect Samurai puzzles in Washington Express

By djape | Published: November 20, 2005
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 […]
Posted in Killer Sudoku, Puzzle books, Samurai sudoku, Washington Post | Also tagged , , , , | 8 Responses

Swordfish

By djape | 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 | Also tagged , , , , , , , , , , | 8 Responses

Welcome new visitors!

By djape | 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 | Also tagged , , , , , , , , , , , , , | Leave a comment

Puzzle difficulty

By djape | Published: October 31, 2005
First of all, I posted a Killer X puzzle rated THINKER for today. I would like to know how difficult you find this one. Regarding the INSANE puzzle posted on Friday – I see that there has been a lot of discussion regarding it’s difficulty and the difficulty of some other puzzles posted last week. […]
Posted in Killer Sudoku | Also tagged , , , , , , , , , , , , , , , , , | 3 Responses

A few words about “Perfection”

By djape | Published: October 18, 2005
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 , , , , | 2 Responses

Killer Sudoku – September 27th

By djape | Published: October 6, 2005
Many people have asked about the Killer Sudoku posted on September 27th. I haven’t tried to solve this Killer by hand but it is very much possible that it requires either a lot of math (the technique that I call “cage/fence splitting”, which will be explained in the next few days) or that it cannot […]
Posted in General, Killer Sudoku, Solving tips | Also tagged , , , | 12 Responses

The Rule of 45 of Killer Sudoku (innies and outies)

By djape | Published: September 27, 2005
This tip is probably the most important solving technique of Killer Sudoku, one that will save you a lot of time. It does involve some math, but very simple one. Basically, the whole story is that you have to bear in mind that 1+2+3+4+5+6+7+8+9 = 45. Very smart, huh? Well, maybe not so, but it’s […]
Posted in Killer Sudoku, Solving tips | Also tagged , , , , , , , , , , | 3 Responses
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