Tricky Sudoku

For fans of Killer Sudoku, Samurai Sudoku and other variants

Tricky Sudoku

Postby Pyrrhon » Tue Oct 10, 2006 1:35 pm

In a forum that is not sudoku-related I found a nice variant called Tricky Sudoku. It is a subvariant of Miyuki Misawas Pair Pair Sudoku.

Her a puzzle I made of this variant:

In each row and column every digit occurs only one time, in the 3x3 boxes there are 3 numbers once , 3 numbers twice and 3 numbers doesn't occur.

Uwe

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Postby emm » Fri Oct 13, 2006 1:37 pm

Was no-one else interested in this puzzle?

I liked it. Even when I saw the pattern, it was still tricky getting the candidates right. I enjoy puzzles like this that are challenging logically but don't require *super* techniques to solve them.

It was hard to overcome all the conditioning about the One Rule and not to automatically eliminate candidates. Also it was pretty impossible to backtrack. I enjoyed this one, thanks Pyrrhon.
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Postby Smythe Dakota » Sat Oct 14, 2006 12:47 pm

I tried it, but was able to place only 4 digits and establish a pair of naked pairs. I guess, for me, it was too much like a killer. Maybe I missed something obvious that would have kept me going.

Bill Smythe
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Postby emm » Sat Oct 14, 2006 6:47 pm

This is nothing like a killer Bill:D - you can find a few singles but then the key is in seeing the pattern.

If you’re interested here’s a hint on how I did it. I have no idea if this is the way Pyrrhon had in mind.

Each number has to appear in a pattern of 2 1 0 in the boxes around the grid. The number 9 gives you the lead in.
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Postby Pyrrhon » Mon Oct 23, 2006 3:43 pm

Yes, this observation results in strong techniques for this sudoku variant.

Uwe
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