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Donut Sudoku: The Delectable New Variantby Frank Rubin
Synopses & Reviews
How sweet it is! Solvers will gobble up this delectable new sudoku variant with a tasty twist. No numbers appear within the central box to start, leaving a "donut hole" in the middle with the numbers that are given sprinkled around the edges. That makes breaking into the central area more challenging—and provides sudoku lovers with a unique solving experience.
Feng shui is the ancient Chinese art of harmonious placement—and these puzzles, with their visual appeal, apply that idea to sudoku. Each handcrafted page features four sudoku, placed so that the position of the clues forms an attractive overall pattern with variety and contrast. The collection contains more than 30 patterns and every form of possible symmetry. Wishing you peaceful and harmonious solving!
About the Author
Dr. Frank Rubin is a retired IBM® computer programmer who has done extensive work in the field of design automation, using computers to design the next generation of larger and faster computers. Dr. Rubin is also a cryptographer who holds major patents in the field of keyless cryptography. Beyond his professional activities, he has constructed thousands of mathematical puzzles, as well as cryptograms, alphametics, SumSum, Double Sudoku, and papers on knight and bishop coverings in chess. This is his first book for Puzzlewright Press.
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