And puzzlers who have completed the first level of sudoku can graduate to these more second-degree puzzles. White and Green belts can keep honing their skills, while Brown and Black will get a new and greater challenge!
Second-degree Brown Belt Sudoku
- 作者： Longo, Frank
- 出版社： Puzzlewright
- 出版日期： 2005-11-28
- ISBN碼： 9781402737169
- 編號： 2039790363963
$ 313 元
原價 348
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$313