ChesssBase

The French Defence Powerbase 2022 is a database and contains 10275 games from the Mega 2022 and the Correspondence Database 2022, 659 of which are annotated.

Most of the material on which the Sicilian Paulsen Powerbook 2022 is based comes from the engine room of Schach.de: 426,000 games. In addition to this impressive amount, there are 43,000 games from the Mega and from correspondence chess.

The Sicilian Paulsen Powerbase 2022 is a database and contains a total of 7435 games, 724 of which are annotated.

How to play the Nimzo-Indian? Does White have promising variations available to him or can Black construct a water-tight repertoire? The answers are provided by the Powerbook based on more than 356 000 games, most of which were played by engines.

Nimzo-Indian Powerbase 2022 is a database and contains a total of 9222 games, 492 of which are annotated.

<p>Une analyse parfaite des fins de partie et une augmentation consid&eacute;rable des performances du moteur gr&acirc;ce au nouvel Endgame Turbo 5!</p>

Grünfeld Defence Powerbase 2021 is a database and contains 10826 top-class games from Mega 2022 and the Correspondence Database 2020, of which 1136 are annotated.

The major part of the material on which the Grünfeld Defence Powerbook 2021 is based comes from the engine room of playchess.com: 232 000 games. To this imposing mass we have added another 70 000 games from Mega and from correspondence chess.

For the Slav and Semi-Slav Powerbook 2021 the ratings average was set at 2400. 1.76 million games from the engine room of playchess.com met this threshold, to which were added over 80 000 games played by humans.

Slav and Semi-Slav Powerbase 2021 is a database and contains a total of 10 610 games from Mega 2021 or the Correspondence Database 2020, of which 1030 are annotated.

Petroff Defence Powerbase 2020 is a database which contains 4821 high class games from Mega 2020 and the Correspondence Database 2020, of which 648 annotated.

The major part of the material on which the Petroff Defence Powerbook 2020 is based comes from the engine room of playchess.com: 260 000 games. This imposing number is supplemented by another 11 000 from Mega and from correspondence chess.

The major part of the material on which the King's Gambit Powerbook 2020 is based is sourced from the engine room of playchess.com: 30 000 games. Another 3500 games from Mega and from correspondence chess have been added to this corpus.

King's Gambit Powerbase 2020 is a database and contains a total of 2531 games from Mega 2020 or the Correspondence Database 2020, of which 112 are annotated.

<p>Le Ben-Oni Powerbook 2020 se compose pour l&#39;essentiel de parties d&#39;ordinateurs (44&#39;600), auxquels ont &eacute;t&eacute; ajout&eacute;es des parties de grande valeur provenant de la Mega des parties par (23&#39;600).</p>