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Tough Sudoku for 6/September/2009

                 
                 
                 
                 
                 
                 
                 
                 
                 

Choose a number, and place it in the grid above.

  1 2 3 4 5 6 7 8 9
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Sudoku Solving Techniques

Submitted by: sudoku lover

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Kevin is growing up so fast! Will he be as handsome as Grandpa?
06/Sep/09 12:12 AM
Wish I had hair like that.
06/Sep/09 12:43 AM
I thought that was Kevin as it came into focus. What a handsome young man and yes, he is growing up fast!!!
06/Sep/09 1:16 AM
1. Note pair 34 at b78.Unique possibilities to 26.
2. If e5=7,h4=7=a3=d7,d6=4 and column h is devoid of 4.So e5=1.UPs to 43.
3. If b9=7,e4=7.Also,b9=5,b1=7=g5 makes e4=7.UPs to 81.
06/Sep/09 1:55 AM
Hi Kevin!
06/Sep/09 3:06 AM
Hello, Kevin! What a handsome boy you are!
Grandpa must be proud and rightfully so!
06/Sep/09 3:13 AM
Hi Kevin.
06/Sep/09 5:55 AM
I wish "I"!!! had hair like that.
06/Sep/09 7:38 AM
Kevin is growning up.
06/Sep/09 8:11 AM
>1 hr
06/Sep/09 12:49 PM
1) Start 22 UP 26
2a) (HP34)b78 => b78<>578
2b) (7)h3 = a3- a7 = (7-4)d7 = d6 - h6 = (4)h4 => h4<>7 UP 81
sets: 2+4 = 6
Max depth 4
non-ssts:1
06/Sep/09 7:07 PM
Hi Steve.Nice one chain solution you give today.Thanks for yesterday's detailed clarification. Regards,Alfred.
06/Sep/09 8:54 PM
18:56
07/Sep/09 10:43 PM

SE=7.2
10/Sep/10 6:24 AM
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