King’s Route

A chess king starts on one cell of a chessboard and takes a tour, passing through each square once, and ending up on the initial square. Show that the king has made not more than 36 diagonal moves.

The king must visit the 28 perimeter squares in order; otherwise, he will create a portion of the board which is inaccessible for him. However, he can not travel from one square to a neighboring one using only diagonal moves. Therefore he must make at least 28 horizontal/vertical moves and at most 64 – 28 = 36 diagonal moves.

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WRONG PUZZLE, the name and answer dont match the paragraph