Custom Sudoku: Countries & Territories (Volume 1)

Custom Sudoku: Countries & Territories (Volume 1) contains 252 puzzles in assorted difficulties, each featuring the name of a country or territory.

 

Custom Sudoku is the first Sudoku variant with repeated letters. It presents new challenges to players and requires new solving techniques

The Sudoku Ripeto Family

Presentation at the 13th Gathering 4 Gardner Conference in Atlanta.