Understand the Hedgehog

Opening Databases (194)


1.d4 Complete Opening Repertoire for White with GM Tornike Sanikidze (9 hours 55 min Video Running Time) 

GM Tornike Sanikidze, a coach of the gold-winning Georgian Women's National Team, has prepared 1.d4 Complete Opening Repertoire for White giving you a full-blown repertoire for White in just under 10 hours!

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Play the Dubov Tarrasch (3h and 20min Video Running Time)  Discounted 

We are happy to present the new database of GM Renato Quintiliano - Play the Dubov Tarrasch. This research provides a complete repertoire for Black after 1.d4 d5 2.c4 e6 3.Nc3 c5. True to his analytical approach, GM Quintiliano submits the arising positions to in-depth analysis. In this database, you will find many new ideas and fresh positions. The database consists of 8 huge theoretical chapters, 16 interactive test positions, a Memory Booster, and Video Version (Running Time 3h and 20 min).


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Play the Queen's Gambit Exchange Variation - Part 2 (2.5h Video Running Time) 

In this database, GM Michael Roiz completes his repertoire based on 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 While Part 1 was entirely dedicated to the Carlsbad type of position arising after 4...exd5, the current database also deals with the Semi-Tarrasch which occurs after 4...Nxd5. Additionally, in this course, GM Roiz deals also with 4...exd5, thus covering lines that cannot be found in Part 1. The database consists of 11 theoretical chapters, 11 interactive test positions, a Memory Booster, and Video Version (2.5h Running Time).


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The Correspondence Chess Today  Updated 

In his first database for Modern Chess, GM Nikolai Ninov made a theoretical overview of the ICCF 19th Correspondence Olympiad Final. GM Ninov is one of the few Grandmasters at Correspondence and OTB chess. As we know, correspondence games are full of interesting theoretical ideas and high-quality novelties. The author divided the material into 10 chapters dedicated to different openings: The Reti, The Gruenfeld, The Catalan, The Slav Defence, The Anti-Slav Deviations, The Nimzo-Indian Defence, The Ragozin Defence, Open Games, The Sicilian Defence, The London System. Any chess player who is interesting in modern theoretical developments will something interesting for him in this database.


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King's Indian Defence - Expert Repertoire for Black - Part 1 (10h and 50 min Running Time) 

In the current database, GM Ivan Cheparinov covers some of the most critical systems that White uses against King's Indian Defence, including the Classical System. It is very important to point out that the suggested repertoire is highly ambitious. Always, when it's possible, Cheparinov proposes relatively less explored lines where Black is trying to overtake the initiative. In the entire repertoire, you will hardly find a static position in which Black is doomed to passivity. The database consists of 17 theoretical chapters, 17 interactive test positions, a Memory Booster, and Video Version (10h and 50min).


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Czech Pirc with GM Misa Pap (3h Video Running Time) 

A 3-hour-long video training on the most vital lines in the opening where Black can turn the table on White with killer plans, ingenious move sequences, and fatal tactical surprises.

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Blumenfeld Gambit with GM Misa Pap (3h Video Running Time) 

With GM Misa Pap’s all-new video training, Blumenfeld Gambit, stretching over three hours, you can execute this fiery pseudo-gambit opening for Black in a flawless way, with a winning plan and killer sequences… while White fumbles around looking for the “best moves”.

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Play the Queen's Gambit Exchange Variation - Part 1 (3h Video Running Time) 

This database marks the beginning of an ambitious project. GM Michael Roiz is planning to provide a complete repertoire for White after 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 The current database is dedicated to the Carlsbad Variation arising after 4...exd5 5.Bg5 c6. The second and final part of the project will feature the highly topical Semi-Tarrasch arising after 4...Nxd5 as well as some minor lines after 4...exd5. The current database consists of 12 theoretical chapters, 12 interactive test positions, a Memory Booster, and Video Version with approx. 3h running time.


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Pirc Defence for Black with IM Marcin Sieciechowicz (9h and 40mins Video Running Time)  Discounted 

IM Marcin Sieciechowicz is here to help you with his brand-new course Pirc Defense for Black… a 10-hour-long HD-quality video training covering almost ALL the most critical variations in the Pirc Defense for Black.

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The Chess World


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Must-Know Structures for 1.d4 Players (4h Video Running Time) 

We are happy to announce the new exciting project of GM Mihail Marin - Must-Know Structures for 1.d4 Players - Part 1. In this part, GM Marin deals with 5 of the most important pawn structures every 1.d4 player should know. The course consists of 49 extensively annotated games which are divided into 5 sections. Besides, you get access to a video version with a running time of 4 hours.


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