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Detailed instructions for working a group puzzle of type 'Sudoku-12up'

The 12 elements in each group of this type of puzzle are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, and B.

Every group in the puzzle must contain exactly this set of elements.

Each row is a group numbered as shown in this Sudoku-12up figure.

In a Sudoku-12up puzzle, each row is a group numbered as shown in the figure above.

Each column is a group numbered as shown in this Sudoku-12up figure.

In a Sudoku-12up puzzle, each column is a group numbered as shown in the figure above.

Each 3x4 rectangle is a group numbered as shown in this Sudoku-12up figure.

In a Sudoku-12up puzzle, each 3x4 rectangle is a group numbered as shown in the figure above.