Radially Symmetric Closed Knight's Tour

This example demonstrates a radially symmetric closed knight's tour, where a knight moves on a chessboard following L-shaped steps, forming a closed circuit that is symmetric about the center. The core mathematical concepts involve Hamiltonian cycles in graph theory, symmetry, sequence construction, and geometric representation of polygonal paths. The construction uses GeoGebra commands such as Sequence, PolyLine, Min, First, and Append, with a series of labeled points (A to Z and subscripted variants) to trace the knight's moves and finally render them as a closed polyline. It is suitable for middle school and above to explore the intersection of symmetry and graph theory, and can be used for mathematical modeling or recreational mathematics demonstrations.