- Each row and column should comprise of three 3-digit primes.
- In each of the second, fifth and eighth rows and in each of the the second, fifth and eighth columns, the three 3-digit primes, in SuDoDu fashion, every digit 1 to 9 will be used once.
- In all other rows and columns digits may be repeated.
- All 3-digit primes should be distinct.
More than one solution may exist.