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another vb vh while we wait

 
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
PostPosted: Thu Apr 02, 2009 7:28 am    Post subject: another vb vh while we wait Reply with quote
very big, and - yes "very hard".

While most of the puzzle is of the "hard" variety, a little more than basics is required near the end ...

A word of caution: one is tempted to use some of the many "UR"s. But the overlapping boxes provide additional constraints, so what looks like a deadly pattern is not deadly after all.

Again, the puzzle takes some time to solve. Plan on spending 2-3 hours on it Smile



Hint: the upper right sudoku is a bit tricky. I used a skyscraper (9) cols 4 and 7.
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