This is a direct replacement for an earlier model that is losing clarity with certain squares so I am pleased to have a complete grid once more.
Verified purchase: Yes | Condition: New
This product gives a complete range of Sudoku problems suitable for beginners to experts. I look forward to many hours of wrestling with my new machine. This is my third Ryo Sudoku which have given me many years of mental entertainment.
Verified purchase: Yes | Condition: New
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