This book contains everything you need to carry out your own Woodpecker training. There are two sites that we would recommend because they offer the best … Sparkchess (Free or $14.99 for Premium) Sparkchess is one of the more limiting free chess options on this list. And since it is available for Windows 8 devices, iPhones, Androids, and Windows Phones, you can play your friends no matter what type of device they have.
