** Detailed instructions for working a group puzzle of type 'Sudoku-6up-UR-D' **

The 6 elements in each group of this type of puzzle are: **1**, **2**, **3**, **4**, **5**, and **6**.

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

In a Sudoku-6up-UR-D puzzle, each row is a group numbered as shown in the figure above.

In a Sudoku-6up-UR-D puzzle, each column is a group numbered as shown in the figure above.

In a Sudoku-6up-UR-D puzzle, each 2x3 rectangle is a group numbered as shown in the figure above.

In a Sudoku-6up-UR-D puzzle, the upper right corners of each rectangle are a group and are marked with '1st' in the figure above.

In a Sudoku-6up-UR-D puzzle, the diagonal elements are a group and are marked with '1st' in the figure above.