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submitting questions

Submitted by: kevin

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I print them & do them on the train going home. Takes 1 hour to do all daily ones from easy to tough, sometimes I have to finish the tough one at home though... but getting better.
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18:48
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to gb
1) You are right; this argument depends on uniqueness of the solution.
2) I think this argument is correct. If there is a solution with
2 4
4 2 then
4 2
2 4 is also a solution.
So uniqueness implies [7,2] = 3.
(Correction to original post: I should have written squares [7,2], [8,2], [7,9], [8,9] of the second grid posted by gb above).
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is this easier when played online? i usually print these out & do them. i'm stuck on today's tough puzzle
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13:20...found 1 x-wing and 1 xy-wing
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12:32
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10:46..04/24/06
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done
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Mar. 6, 2007.
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20:28
29/Apr/07 9:11 PM
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30 mts.
16/Aug/07 3:15 AM
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10.33
15/Sep/07 5:53 PM
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SE=4.5
05/Sep/10 7:35 AM
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