Detailed instructions for working a group puzzle of type 'Nickolaus'
This is a signature puzzle named 'Nickolaus'
The 9 elements in each group of this type of puzzle are: N, I, C, K, O, L, A, U, and S.
Every group in the puzzle must contain exactly this set of elements.
In a Nickolaus puzzle, each row is a group numbered as shown in the figure above.
In a Nickolaus puzzle, each column is a group numbered as shown in the figure above.
In a Nickolaus puzzle, each 3x3 square is a group numbered as shown in the figure above.