Árpád Kurusa
mathematician, associate professor

Department of Geometry Bolyai Institute Faculty of Science University of Szeged 
The man is overtaken by his fate .... :)
As a soldier in 1981 I survived the boring periods by trying to walk around every square of a chess board by a knight. Returning to the university, in the first summer, in 1982, this boredom reliever problem came up again and I started to find the size of all the chess boards that can be walked or walked around by a knight. This short thinking filled the pages of a checkered booklet, which I found, scanned and placed on my website in 2010 at a tidying up. It can still be downloaded. There is complete proof in the booklet for the next theorem.
Theorem
This little entertaining "work" appeared last week (March 2nd) in my daughter's high school and, moreover, in her class as a good example for the Hamilton path and circle of a graph.