Like the famed "Parker Square", but with distinct digits. Examples exist for 4x4, 5x5, 6x6, maybe higher. 3x3 is conjectured impossible. It must be a square of distinct perfect square integers such that each row, column, and diagonal sums to the same number.

https://www.youtube.com/watch?v=U9dtpycbFSY

, where the latest Numberphile guest conjectures this is the case. 

General policy for my markets: In the rare event of a conflict between my resolution criteria and the agreed-upon common-sense spirit of the market, I may resolve it according to the market's spirit or N/A, probably after discussion.

Main video: https://youtu.be/Kdsj84UdeYgGo another level deeper with the reaction to the reaction: https://youtu.be/tD2q2-_5TycMatt Parker is Standupmaths: h…