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Submitted by: Gath

Indicate which comments you would like to be able to see
I see by looking at Clark's proof that my step 3 is totally unneeded.
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Modified proof incorporating Clark's improvement, and resolving a problem my longer step:
1) Start at 22 filled - the given puzzle. Unique Possibilities to 27. (UP 27)
2) Pair 79 at h89 forbids 9 from h1, 7 from h1567,g78, i7 UP 35.
3) Pair 69 at b13 forbids 6 from b45,ac3 and 9 from More...
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step 4 above, replace forbidding of a7=48 with c7=48. Sorry again.
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Meg - very nice solution!! Here is your solution written as a full proof with fc notation:

1) Start at 22 filled - the given puzzle. Unique Possibilities to 27. (UP 27)
2) Pair 79 at h89 forbids 9 from h1, 7 from h1567,g78, i7 UP 35.
3) Pair 69 at b13 forbids 6 from b45,ac3 and 9 More...
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Nov. 22, 2007.
23/Nov/07 3:20 AM
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SE=6.7
05/Sep/10 8:52 PM
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