Solution to September 20, 2021
Solution: The 3x3 square shown below is unique up to rotations and reflections. There are 880 solutions to the 4x4 magic square extension problem, so I won't list those here.
Solution: The 3x3 square shown below is unique up to rotations and reflections. There are 880 solutions to the 4x4 magic square extension problem, so I won't list those here.