• Chess Database with 31 million games,
    world biggest collection of chess games

  • Over-the-board database with 10 million,
    Correspondance with 2 million human games.

  • Download easily now,
    great database for every chess players.

  • Watch latest podcast episodes,
    on your favourite streaming platforms .

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Chess Database - Pay what You really need

Supporting the Cause

Introducing our annual subscription program, featuring monthly chess database updates for an enhanced chess experience. Please note that this is a digital download product. Upon sign-up, kindly read and accept our Terms and Conditions. You have the freedom to cancel the program anytime before the renewal date. Even if canceled, you will still have access to valuable chess databases lifetime without future updates. Thank you for supporting our cause to make a difference in the lives of underprivileged children through education and donations. Check out our latest chess cause charity, donate chess set and and save 20%

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  • OM CORR
  • €39
  • Correspondence chess database with 2.2 million human chess games. The largest collection of ICCF or corr chess players
  • FOR: Correspondence chess players (e.g. ICCF)
  • UPDATES: monthly
  • Formats: Chessbase, PGN
  • Pay with card
  • Check Out with PayPal
  • Review details
  • OM OTB
  • €59
  • Over-the-board database with 10.2 million human chess games. The largest FIDE/OTB chess database collection.
  • FOR: Classic chess players (e.g. FIDE players)
  • UPDATES: monthly
  • Formats: Chessbase. PGN
  • Pay with card
  • Check Out with PayPal
  • Review details
  • OM GOLEM
  • €99
  • Chess Database with 31.4 million human chess games. The largest ever collection of human chess games since 1800
  • FOR: Collectors - World largest human chess database
  • UPDATES: monthly
  • Formats: Chessbase, PGN
  • Pay with card
  • Check Out with PayPal
  • Review details
 

Download 56 top openings by Opening Master for free and try our chess databases for free. For indian flag small Indian customers please visit here to pay with local debit cards.

The Opening Master Chess Databases since 2004

Discover the ultimate chess winning game with Opening Master chess databases! Our exclusive collection features over 31 million top human chess games, making it the most extensive human chess database without any duplicates. The OM OTB with 10.2 millions human chess games or OM CORR with 2.2 millions correspondence chess games is something for every chess player.  ♥ Join today and unlock the biggest chess database package, carefully crafted over 18 years of research and development. Opening Master is official database partner of FIDE - International Chess Federation Education Commission, a proud sponsor of ICCF global tournaments and a trusted chess database partner of global chess education platform GCHESS. For our youngest ones we partner with ChessKid.com - the safest online chess platform for children. Opening Master gives back to the community by partnering with Gift of Chess, a humanitarian charitable organisation from NY, USA, to support underprivileged communities in Africa by giving out 1 million free chess sets. If you are a tournament organizer, arbiter, club trainer, streamer or player please join our partner OUTPOSTCHESS see many benefits for you. We offer you the most reliable and comprehensive chess databases starting as low as 39 EUR. Don't wait any longer to take your game to the next level - sign up now and start learning and winning! 

   FIDE logosmall   ICCF transChessKid trans  GCHESS trans Gift of Chess trans Outpostchess logo trans

“It’s the biggest and strongest chess database out there” - GM Simon Williams, CEO GCHESS

Subscribe to our YouTube channel Youtube Openingmaster to learn chess openings and much more. Listen to our Spotify Podcasts spotify icon transon weekly basis.

Chess database Matrix

Database name
OTB
Number of games
2,257,785
10,230,938
31,440,366
1,738,847
487,942
Formats supported
cbv, pgn
cbv, pgn
cbv, pgn
cbv, pgn
cbv, pgn
Last Update
06/2025
06/2025
06/2025
02/2025
02/2025

From our kitchen

Friday, 13 June 2025 10:30

In an era dominated by real-time online blitz games, grandmaster commentary streams, and AI-assisted training tools, one might assume that correspondence chess has faded into history replaced by the...

Wednesday, 11 June 2025 20:17

In the ever-evolving world of chess, where engines grow stronger, ChatGPT is everywhere and preparation becomes ever more critical, one thing remains constant - the need for accurate, reliable , and...

Tuesday, 13 May 2025 20:23

In an era where Artificial Intelligence dominates headlines whether it’s ChatGPT from OpenAI, Gemini by Google, or Elon Musk’s Grok on X, one might wonder: Is there anything still purely human? One...

Sunday, 06 April 2025 06:48

March was a dynamic and electrifying month for the global chess community. From world-class tournaments to almost perfect individual performances, the chessboard saw battles that inspired fans and...

Saturday, 08 March 2025 01:37

Today, on International Women’s Day, we honor the incredible women who have shaped the world of chess—past, present, and future. Chess has long been a game of strategy and intellect, but for...

Monday, 03 March 2025 00:48

We are thrilled to share that Opening Master has taken its nonprofit mission for chess education to Accra, Ghana, joining forces with The Gift of Chess (New York) and the West African Chess Academy....

Tuesday, 18 February 2025 23:12

The world of chess databases just witnessed a historic transformation! At Opening Master , we have undertaken the biggest clean-up of the century , removing more than 2 00,000 chess players and...

Sunday, 09 February 2025 18:23

Powerful stories of strong minded people effecting hundreds of thousands young children not only in Africa. Tunde Onakoya is now in New York where I met him last time discussing how one can grow up...

Sunday, 09 February 2025 13:50

Opening Master and FIDE Education Commission is calling all out STEM graduate degree students who would like to author interesting BIG DATA chess science project. With a massive chess database like...

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Our most famous chess databases

If you ask us, which is the most favourite product our customers are buying, the clear answer is OM CORR. All ICCF players love it. The OM OTB is the most powerful over-the-board chess database ever made, and many FIDE GM players use it and OM GOLEM - well it's just the biggest one out there.

 

OM GOLEM

OM GOLEM is the ICON of all human chess databases. The database is so massive that the most robust computers are needed. It has more than 31.4 million human games without duplicates. It is a mixture of correspondence, OTB, and portal games.

OM CORR

The OM CORR wasn't always a separate chess database until about seven years ago when the need from correspondence players stood out. With 2.2 million games, it is the correspondence best chess database suited mostly for ICCF players.

OM OTB

The OM OTB with almost 10.2 million chess games is the biggest over-the-board collection of human chess one could come up with. It all began in 2004 when creators started to collect games and analyse them. A must package for all FIDE players.

 

Do we need chess databases?

It may seem obvious that chess players do need chess databases but did you stop for a second to wonder why? And, namely, for education purposes, is it so important? Well, let's try to answer. Education may be defined as the process of learning. And how can we learn? An old teacher told me, recently, that education is, simply, to pose questions! And the teacher role is to lead the student to these questions, to give him that uncomfortable feeling one experience until the answer is found! And an answer, obviously, will lead to more questions...
 
I wonder you are asking where are the chess databases so far. It is clear that any student needs a teacher but most of the work is on the student's side. After the first fundamental questions, like the movement of chess pieces, very easy to reply, the student must find the answers by himself and these can be found where the data is stored: books, traditionally. However, in our modern society of information and communication, books are no longer the main and only source of knowledge: chess databases are a must to our huge board addicted tribe. Together, chess books and databases are the basis of the chess learning process, are complementary and must coexist. And if the first, chess books, can primarily tell us how to play, both chess books and databases can show us what to play but only the latter, chess databases, can present us what has been played. This dynamic character of chess databases, along with many other advantages in both the chess learning process and its practice, will be the focus of this article.
 
Dynamic. I love books and I am sure most chess players love it as well but let's be fair: books cannot evolve, chess databases do. This is of huge importance. The production of knowledge is faster than ever nowadays and it is of little use if one cannot access it. Books have its place in chess, a beautiful place of honor, but data must be updated, and such endeavor is only possible with chess databases. Fortunately, chess is played every single day in the World and the more important tournaments are recorded and available for all. This is a "miracle" that all chess players had to live without until a couple of years ago. If new data is available, new questions may arise and we can learn more and faster.
 
References. After some time, a student will define its play style and, therefore, needs models, influences, references. "I love Tal's style,  his early matches are overwhelming!". "Carlsen is still so young, which is his favourite opening?". These references can be easily found in a chess database. How comfortable is to have a long list of chess games from where we can choose the most interesting to us in  any particular case. And if in our earlier days of chess the aggressive styles of Tal and Carlsen where the most interesting, as we evolve all the other styles and players are also there. With the times, our questions will be more specific and the answers more focused but we will never know everything. So, a chess database will be a partner in our chess practice throughout our lives.
 
Preparation. So far, we know the chess databases are always evolving, we have defined our play style and our favourite openings. Then, the way to expertise is open. No longer the random search for the fun and beauty of the game/art that chess is. The chess database is a real partner when preparing for the big steps. The opponents' favorite openings, late performances, recent tournaments played, all that matters in the way to FM, IM and GM titles! From the early "open" search to the very specific player x, tournament y, opening z search, databases are always there for our aims at each moment in our career.
Future. Last but not least, a leap to the future: history! Chess, as any other activity, can greatly benefit by having a well documented past. It is not necessary to study again what the ages could prove is not worth playing to be successful. And how can we be sure that we are facing a theoretical novelty? Well, you can also rely on databases but, contrarily to all that have been herein written, the theoretical novelty is exactly what is successful and is not present in the chess database... yet!
 
All things considered, chess learning, chess practice and chess databases are intimately linked. A chess player learns from the same database that, one day, he will help to complete. As any symbiosis, both benefit from this compulsory cooperation.
 
-- Paulo de Morais --

We use Sync.com Cloud

sync is the new save How it works:

1. You select type of Plan you wish to download. OM CORR, OM OTB or OM GOLEM

2. Pay by the  secure gateway PayPal. We accept major credit/debit cards.

3. A confirmation email with the subscription details comes to you.

4. We register your email address to cloud service SYNC and invite you to a shared folder. It's all FREE.

5. You download all the databases to your local hard drive. You will always find a newest version of the Opening Master chess databases on the cloud.

Why Opening Master

  • It's biggest +

    Yes, we have reached a massive collection of more than 30 million human chess games.
  • For correspondence or ICCF players +

    If you are standard or professional ICCF players, the OM CORR database with 2 million
  • For OTB or FIDE players +

    The FIDE collection or OM OTB with more than 9 million games. This is the
  • Top Notch Support +

    Didn't find a game you were looking for? Write to us. Found a wrong game?
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What Our Clients Say

  • “It’s the biggest and strongest chess database out there” - GM Simon Williams, CEO and Founder of GCHESS
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Federations we supported Our Current and Previous Cooperations

ICCF

ICCF

International Correspondence Chess Federation - Global Read More
Czechia

Czechia

Czech Correspondence Chess Federation Read More
India

India

All India Correspondence Chess Federation (AICCF) Read More
U.K.

U.K.

British Federation for Correspondence Chess Read More
Romania

Romania

Şah prin Corespondenţă Read More
Argentina

Argentina

Liga Argentina de Ajedrez por Correspondencia Read More
Spain

Spain

Asociación Espaňola de Ajadrez por Correspondencia Read More
Portugal

Portugal

Associacao Portuguesa de Xadrez por Correspondencia Read More
Turkey

Turkey

TCCA Turkish Correspondence Chess Association Read More
USA

USA

International Correspondence Chess Federation USA Read More
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