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By David J. Bodycombe. Author David J. Bodycombe. In 7th heaven when you complete them, you'll 8 giving up on any of these - but those 9 by nines won't complete themselves.Good luck! The Penguin Sudoku Challenge.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.