Detailed instructions for working a group puzzle of type 'Sudoku-Plus'
The 9 elements in each group of this type of puzzle are: 1, 2, 3, 4, 5, 6, 7, 8, and 9.
Every group in the puzzle must contain exactly this set of elements.
In a Sudoku-Plus puzzle, each row is a group numbered as shown in the figure above.
In a Sudoku-Plus puzzle, each column is a group numbered as shown in the figure above.
In a Sudoku-Plus puzzle, each 3x3 square is a group numbered as shown in the figure above.
In a Sudoku-Plus puzzle, the left center spots of each 3x3 square are a group and are marked with '1st' in the figure above.
In a Sudoku-Plus puzzle, the top center spots of each 3x3 square are a group and are marked with '1st' in the figure above.
In a Sudoku-Plus puzzle, the centers of each 3x3 square are a group and are marked with '1st' in the figure above.
In a Sudoku-Plus puzzle, the right center spots of each 3x3 square are a group and are marked with '1st' in the figure above.
In a Sudoku-Plus puzzle, the bottom center spots of each 3x3 square are a group and are marked with '1st' in the figure above.