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Submitted by: uno hu

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great pic of the Nile.
15/Jan/08 12:07 AM
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I take back yesterday's comment! This Tough was just as hard as the ones I was doing again from May! I had to resort to guesses, and I made many wrong guesses in doing this one.
15/Jan/08 1:03 AM
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Hi and good Maen to all of you.
One of my lovely photos of Aswan Nile.Hope it meets with your interest..
15/Jan/08 1:32 AM
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15/Jan/08 5:08 AM
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As always, Wagdy, your picture is interesting!
15/Jan/08 7:20 AM
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so clear and still at first it looks like a model - lovely photo Wagdy. Is it cold in Egypt too? its freezing in Doha
15/Jan/08 8:32 AM
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maen. 12.20. Challenging puzzle. Beautiful photo Wagdy.
15/Jan/08 8:49 AM
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15:11 Good Maen, everyone. Wagdy, that is indeed an interesting photo. Such a beautiful blue.
15/Jan/08 8:59 AM
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Wagdy - Thank you! What a beautiful place!
15/Jan/08 10:03 AM
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Be careful what you wish for, SARAH!
15/Jan/08 10:06 AM
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How come I can solve level hard, easily but in no way I seem to be able to solve level tough?
15/Jan/08 10:28 AM
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Jonathan, I have the same problem that you have. If you have the persistence (and, in my opinion, a "math brain") to figure out forbidding (forcing) chains, you might want to check out Steve's "Sudoku Blog" at the top right of this page.
15/Jan/08 11:14 AM
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15/Jan/08 1:22 PM
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Thanks Wagdy.
15/Jan/08 3:14 PM
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In about 2 weeks, I'll be there!
15/Jan/08 3:39 PM
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Jonathan & Cami - I agree. I find that the 'tough' one is so much harder than 'hard', I seldom have the patience to persevere and just start guessing. I never set the timer.
I can do it if I print it and work on it that way with pencil marks all over it.
15/Jan/08 3:48 PM
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Joanathan...Cami's suggestion to check out Steven's Sudoku Blog is a good one. It also helps to see how other websites describe the same techniques. By being persistent, I'm beginning to do some simple chains, etc. After learning how to read proofs--then write them--I got better.
15/Jan/08 4:01 PM
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Jonathon, I'm glad you asked your question because the answers are a great help to me. I find I also have to be patient and learn at my own pace. With this one I made one lucky guess and then the rest sorted out. When I can do the hard puzzles quickly then I'll spend some time learning about the chains. At first I had to guess to get the hard ones out, so I am definitely improving.
15/Jan/08 5:12 PM
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8.25 I have always enjoyed this photo of the Nile.
15/Jan/08 11:25 PM
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Thanks. I'll take a look.
20/Jan/08 12:29 AM
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07/Sep/10 10:38 PM
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quick run through SST to UP=26
1.(4)ef6=(45')bd6-(8)d6=(8-9)d8=(9-7)e7=e3-(7-234)d123 => d4568<>4,d6<>2,d8<>34
2.aur(16)ae13=> ae3<>6
note aur(26)ag56=>(1)g56=(9)a5
3.kraken cell(139)g8 => More...
02/Jan/11 10:53 AM
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that is not an elegant path and begs improvement.
02/Jan/11 10:54 AM
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