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Keep Up The Good Work
When I signed up for your "How To Solve All Sudoku Puzzles" newsletter, I was most interested in finding out what techniques were available for solving Sudoku puzzles.
The newsletter met my expectations excellently. The techniques you described were exactly what I was looking for.
I was surprised to learn that there was a publication that went far beyond concentrating on technique, and instead attempted to reach other unanticipated heights, very successfully I might add.
Keep up the good work. Thanks.
Mike Dodson, Waikanae, Kapiti Coast, New Zealand