Tag Archives: solving tip


A while ago I explained the X-Wing solving technique. Recently I shown my explanation of other basic, Classic Sudoku solving techniques. The only remaining solving method that I don’t consider trial and error is Swordfish. So, to complete the list of Sudoku solving tips, here is an example of a Sudoku puzzle that can be […]
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Samurai Sudoku rules

I’ve been asked a few times to post some Samurai sudoku solving tips. Well – there aren’t any special tips that apply exclusively to Samurai. Standard Sudoku rules apply, but to make things clear for newcomers, I’d like to give a brief set of instructions. Rules of Samurai Sudoku 1. Each Samurai Sudoku puzzle consists […]
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Welcome new visitors!

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 – […]
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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 […]
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Archive of daily puzzles delayed :(

I’ve had some problems today with my website hosting company because apparently they don’t support a library that is required for displaying images gallery style (so you could browse through old daily puzzles). There is a workaround for that, but it’s going to take a day or so to implement. I’m sorry about this folks. […]
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Killer Sudoku solving tip 2.

Ok I know that not everybody is good with math so here is a little tool that you could use to figure out different combinations of digits that could go into a ‘cage’. First enter the cage sum displayed in Samunamupure and then enter the total number of cells in that cage. You will automatically […]
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Samunamupure solving tip 1.

The following list contains ALL possible cage sums that have only one solution for the corresponding number of cells in the cage. You may use this list to help you solve Samunamupure puzzles: doubles 3=1+24=1+316=7+917=8+9 triplets 6=1+2+37=1+2+423=6+8+924=7+8+9 quads 10=1+2+3+411=1+2+3+529=5+7+8+930=6+7+8+9 5 cells 15=1+2+3+4+516=1+2+3+4+634=4+6+7+8+935=5+6+7+8+9 6 cells 21=1+2+3+4+5+622=1+2+3+4+5+738=3+5+6+7+8+939=4+5+6+7+8+9 7 cells 28=1+2+3+4+5+6+729=1+2+3+4+5+6+841=2+4+5+6+7+8+942=3+4+5+6+7+8+9 8 cells 36=1+2+3+4+5+6+7+837=1+2+3+4+5+6+7+938=1+2+3+4+5+6+8+939=1+2+3+4+5+7+8+940=1+2+3+4+6+7+8+941=1+2+3+5+6+7+8+942=1+2+4+5+6+7+8+943=1+3+4+5+6+7+8+944=2+3+4+5+6+7+8+9 More tips coming soon!
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