Where do I go from here?

Advanced methods and approaches for solving Sudoku puzzles

Where do I go from here?

Postby paolothehoo » Thu Oct 20, 2005 4:58 pm

I can't find any x-wing hidden naked trip quad royal flushes (or whatever those things are). I've researched other techniques for solving and I can't figure this one out. What's next? THANKS!

*** 8*6 4*2
**2 954 *8*
648 2*7 ***

4*6 7*9 513
5*1 463 **7
379 1*5 *4*

*** 6** **4
*6* 34* 1**
8*4 5** ***
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Postby PaulIQ164 » Thu Oct 20, 2005 5:16 pm

I'm afraid you missed a simple one. Only one place for the 6 to go in column 8.
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Postby stuartn » Thu Oct 20, 2005 5:19 pm

I can see a pair in C5 that'll allow some eliminations - then look where the 9's and 5's are in block 1 - it'll allow some eliminations in block 3.

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Postby paolothehoo » Thu Oct 20, 2005 5:20 pm

Aaaaah! I HATE it when I do that! I even looked at it over and over. I need more coffee. Thanks.
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Postby PaulIQ164 » Thu Oct 20, 2005 5:23 pm

It's a slightly unusual one, mind. Usually when you make an only-one-place-in-the-column elimination, there's one of the particular number in one of the boxes that intersects the column, usefully cutting out three places in the column at once. But in this case all four of the spaces in the column you eliminate are based on other 6s in their rows.
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