New opening ideas are often the product of working with a computer in today's digital age, with the battles shaping the forefront of chess theory often taking place in engine vs. engine matches on Playchess.com. The new Slav Powerbook 2012 has not much to do with the previous version. It is composed of more than 190,000 games from the familar areas of the Slav and Semi-Slav. The biggest part are pure computer games, about 25,000 master games are added.