A Hard, But Bypassed Kampbelmann 50

My Basic bypass starts with a resolved 4-fill. Did yours? 

The final collapse begins with the value 8 scan resolving the naked pair left from the resolution of 3-fill c2[258].

In the bypass trace, you can discover when the previous 8 clues were found.

That was a very productive 4-fill. Here is the collapse trace, and solution.

Next week, another Kampbelmann Hard, 134, offers a 3-fill among the givens. Take it first. If it does not resolve immediately, you at least get a fill string to help later.

About Sudent

I'm John Welch, a retired engineering professor, father of 3 wonderful daughters and granddad to 7 fabulous grandchildren. Sudoku analysis and illustration is a great hobby and a healthy mental challenge.
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