TrainingOpeningPowerbooks

The Najdorf Powerbook 2016 is based on a totally incredible number of games: 1.9 million! The lion’s share is provided by the engine room on playchess.com, with the addition of 120 000 games from human experts.

In our Powerbook we have brought together all games with the ECO codes B40-B49. Added to 62 000 selected master games from both Mega and correspondence chess there 122 000 high class games from the engine room on playchess.com.

For the Queen's Gambit Declined Powerbook we once again used above all high grade material: 90 000 games from Mega and from correspondence chess, but these are of high quality. Added to that are 410 000 games from the engine room on playchess.com.

The new King's Indian special book is based on 59 000 games from the Engine room plus 67.000 "human" games – predominantly from Mega 2016, rounded out with top games from the correspondence chess database.

The Dutch Powerpook is based on 35,000 selected games from the Mega Database 2016 as well as 20,000 high-class engine games from the machine room of playchess.com.

We have included the whole E00-E59 complex in our “Complete Nimzo-Indian Powerbook 2016”. It is based, e.g., on 45 000 games from the Mega database and 4000 correspondence games. The lion’s share is made up of the 245 000 games from the engine room.

The Caro-Kann Powerbook 2016 is based on over 278 000 games, of which more than 180 000 come from the engine room on playchess.com.

The Open Powerbook 2016 contains all the other open games (except the Ruy Lopez). It will consist predominantly of engine games (333 000), with in addition top class material from Mega (40 000) and a small number of correspondence games (4000).

The Dragon Powerbook 2016 is based on over 113 000 games. Only the best games from classical tournaments (50 000) and correspondence chess (20 000) have been used. They are supplemented by over 43 000 games from the engine room on playchess.com.

For the first time we have used exclusively games from the engine room on playchess.com for the Ruy Lopez Powerbook 2016. The tremendous number of 1.1 million games in the Ruy Lopez allows meaningful statistical analyses even amongst side variations.

For the French Powerbook we once again used above all high grade material: “only” just 20 000 games from Mega and from correspondence chess, but these are of high quality. Added to that are 235 000 games from the engine room on playchess.com.

Based on a good 685 000 games, of which roughly 5% were played by humans, this powerbook brings together the related areas of the Slav and the Semi-Slav.

The current openings theory with 1,5 million games