Sudoku Jigsaw, Paperback by Veider, Dart, ISBN 1542996430, ISBN-13 9781542996433, Brand New, Free shipping in the US

Sudoku Jigsaw (also known as “Irregular”, “Nonomino” or “Geometric Sudoku”) is a logic-based, combinatorial number-placement puzzle.

Jigsaw Sudokus are very similar to regular Sudoku puzzles. Regular 12x12 Sudoku that row and column rules apply, but instead of a 4x3 grid they are twelve Jigsaw shapes.