Above: A Century of Checkerboard Puzzles by Jacques Haubrich (copyright J. Haubrich, Netherlands, 2005, 11.75 by 8.25 inches, soft cover, 254 pages) Left: Additional Checkerboard Puzzle Designs by Jacques Haubrich (copyright J. Haubrich, Netherlands, 2005, 11.5 by 8.2 inches, soft cover, 130 pages) This book and its companion of additional designs is a comprehensive coverage of the many variations over the years of the checkerboard puzzle (a.k.a. broken chessboard puzzle).