
Chain Sudoku: 250 Medium to Hard Chain Sudoku Puzzles 9x9 - Paperback
Chain Sudoku: 250 Medium to Hard Chain Sudoku Puzzles 9x9 - Paperback
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by Mindful Puzzle Books (Author)
Chain Sudoku consists of a group of circles arranged in a square grid and containing given clues in various places. The object is to fill all empty circles so that the digits appear exactly once in each row, column and chain.



















