October 23–October 28, 2010

Problem

In his journey around the chessboard, the King visits exactly once each of the squares, taking one step to go from square to the next, and finishing right at the initial square (You could say he visited this square twice). Show that the King took an even number of steps in a diagonal way.

Solution

here

List of solvers

Steve Alkire, Jonathan Shi, Joshua Lim, Rajneesh Hegde, Marina Meila, Jonathan Cross, Mike Goodman, Peiyush Jain, Danushen Gnanapragasam, Milda Zizyte, Naveen Naidu Narisetty, Doug Sherbon, David Lingenbrink, Lloyd Sakazaki.

Doug Sherbon wins the prize!