Tournament Sudoku Training: 500 Hard-Difficulty Puzzles for Competitive Solvers: 8.5 x 11 Letter Edition - 4 Puzzles Per Page - The Format Built for Speed and Technique Practice

Tournament Sudoku Training: 500 Hard-Difficulty Puzzles for Competitive Solvers: 8.5 x 11 Letter Edition - 4 Puzzles Per Page - The Format Built for Speed and Technique Practice

Independently published

Pages: 183, Paperback, Independently published

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