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Gruenfeld Defence Powerbook 2019
The major part of the material on which the Grünfeld Defence Powerbook 2019 is based comes from the engine room of playchess.com: 219 000 games. To this imposing mass we have added another 60 000 games from Mega and from correspondence chess.
Ruy Lopez Powerbook 2019
The Ruy Lopez Powerbook 2019 has a tree structure based on1.95 million computer chess games played in the engine room of playchess.com.
Pirc Defence Powerbook 2019
The Pirc Defence Powerbook 2019 (including the Modern Defence) consists for a greater part of engine games (160 000), to which has been added high value material from Mega and the Correspondence Database (46 000).
Queen's Indian Defence Powerbook 2019
The Queen's Indian Powerbook 2019 has a tree structure which is based on a mixture of over 350 000 complete chess games played in the Engine room of playchess.com and the best games played by humans (50 000).
Sicilian Kalashnikov Powerbook 2019
The major part of the material on which the Sicilian Kalashnikov Powerbook 2019 is based comes from the engine room of playchess.com: approximately 18 000 games. To these have been added another 4500 games from the Mega database and from correspondence ch
Sicilian Sveshnikov Powerbook 2019
The greater part of the material on which the Sicilian Sveshnikov Powerbook 2019 is based, comes from the engine room in playchess.com: 193 000 games. This imposing number has been supplemented with another 12 000 games from the Mega Database and from cor
Colle-Zukertort Powerbook 2019
The Colle-Zukertort Powerbook 2019 contains mainly engine games (53.500) and high-level material from the Mega and the Correspondence Database (4.500).
Torre Attack Powerbook 2019
The Torre Attack Powerbook 2019 is based on a mix of 37,000 computer games and 13,000 games from the Mega database and the Correspondence Database.
French Defence Powerbook 2019
The main part of the material on which the French Powerbook 2019 is based comes from the playchess.com engine room: 610,000 games. An impressive number to which 72,000 games from correspondence chess and the Mega were added.
Italian Game Powerbook 2019
The Italian Powerbook 2019 will consist predominantly of engine games (1.026 000), with in addition top class material from Mega and a small number of correspondence games (14 000).
King’s Indian Powerbook 2019
For the King’s Indian Powerbook it was above all high value material which was used: 99 000 games from the Mega database and from correspondence chess, with in addition over 252 000 games from the engine room on playchess.com.
English Opening Powerbook 2019
For the English Powerbook only high value material above all was used: “Only” 62 000 games from Mega and from correspondence chess. To those were added 472 000 games from the engine room on Playchess.com.