Permanent problem IDPPL 007
Recreational mathematics
Construct a 3×3 magic square containing at least seven distinct squared integers that is not a rotation, reflection, or square multiple of the sole known seven-square example; a full square of nine distinct squares also resolves the classical problem.
Construct a 3×3 magic square containing at least seven distinct squared integers that is not a rotation, reflection, or square multiple of the sole known seven-square example; a full square of nine distinct squares also resolves the classical problem.
The first person to construct the requested square, or prove it impossible where the enigma permits, wins the listed cash prize and a bottle of champagne. The sponsor’s page says eight prizes remain, totaling €6,500; confirm submission logistics before relying on the offer.
Sponsor page remains online but its last recorded winner update is from 2017.