The great knight's tour of George Koltanowski
08.03.2003 A week ago we published an article that took a closer look at the apparently fabulous feat of a nine-year-old boy, who performed a blindfolded knight's tour of the chessboard on German TV. This produced a number of letters from our visitors, one of which reminded us of a truly remarkable feat performed by a man who was close to ninety years old. Here is an addendum to the original article.