Chess on Earth: A game of day and nightA dual purpose story book and chess set for young children . 'Chess on earth' is all about teaching chess in a fun, approachable way. In order to impress on children the basics of the game, this book represents the pieces on a monumental scale. The pieces come to life as elements of the earth, such as waterfalls, rivers or mountains. Each character has its own personality which defines the way they move about the board. Day and night represent white