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Chess Database - Pay what You really need

All chess database plans come with awesome support by email and phone. There is no hidden fee!

  • OM Basic
  • €28 / year
  • As-is chess databases, no monthly updates
  • OM OTB, OM CORR, OM 2500, OM TOP CORR, 52 Opening reports
  • Formats: PGN only
  • Sign Up
  • OM Standard
  • €39 / year
  • As-is chess databases, no monthly updates
  • OM GOLEM, OM OTB, OM CORR, OM PORTAL, OM 2500, 52 Opening Reports
  • Formats: Chessbase only
  • Sign Up
  • OM Ultimate
  • €59 / year
  • Monthly updates, includes also OM CORR TOP
  • OM GOLEM, OM OTB, OM CORR, OM PORTAL, OM CORR TOP, 52 Opening Reports
  • Formats: CB, CA, PGN
  • Sign Up
 

Download free OM POWER 2500+ to try out our chess databases. No credit card needed! Review in details our product portfolio View Product Portfolio.

Welcome to Opening Master

The exciting new Opening Master chess database features a unique chess games collection with more than 24 millions of top human chess games, making it the largest human chess database without duplicates. Experience the power and flexibility of Google No.1 "largest chess database"  to create the ultimate chess winning game. Become a member today and enjoy the biggest chess database package, all carefully selected with more than 10 years of research and development. Subscribe to our annual programs starting as low as 28 EUR / year.

Chess database Matrix

Database name
OM OTB
OM CORR
OM PORTAL
OM GOLEM
OM OTB
OM CORR
OM PORTAL
OM GOLEM
OM OTB
OM CORR
OM PORTAL
OM CORR 2300 + CTG
Type of Subscription
BASIC
BASIC
BASIC
STANDARD
STANDARD
STANDARD
STANDARD
ULTIMATE
ULTIMATE
ULTIMATE
ULTIMATE
ULTIMATE
Number of games
7,600,674
1,613,952
15,534,494
26,501,780
8,196,295
1,693,700
18,288,579
26,501,780
8,196,295
1,693,700
18,288,579
173,101
Formats
PGN
PGN
PGN
CB
CB
CB
CB
CB
CB, CA, PGN
CB, CA, PGN
CB
CB, CA, PGN
Last update performed
Apr 19, 2016
Sept 27, 2015
Oct 19, 2015
Jan 30, 2017
Oct 7, 2017
April 25, 2017
July 6, 2017
Jan 30, 2017
Oct 7, 2017
April 25, 2017
July 6, 2017
April 28, 2015
Update Frequency
Annually
Annually
Annually
Annually
Annually
Annually
Annually
semi-annually
biMonthly
biMonthly
semi-annually
annually
  • All
  • Announcements
  • Federations
  • General
  • Holidays
  • Openings
  • Default
  • Title
  • Date
  • Random
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Our most famous chess databases

If you ask us, which is the most favorite product our customers are buying, the clear answer is OM CORRESPONDENCE. All ICCF players love it. The OM OTB is the most powerful Over-the-board chess database ever made and FIDE players analyze 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 huge, the strongest computers are needed. It has more than 24 million human games without duplicates. It is a mixture of correspondence, over-the-board and portal games.

OM CORR

The OM CORR wasn't always a separate chess database until about 7 years ago when the need from correspondence players clearly stood out. With 1,7 million games, it is the correspondence best chess database.

OM OTB

The OM OTB with more than 8 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 analyze them.

 

Terms of Service

Opening Master has a number of regulations by which its members are expected to abide. Please familiarize yourself with our Terms of Service policy before you open your Opening Master account. Check the checkbox in the "Terms of Service" section by clicking in it only if you understand and agree to observe our rules. If you attempt to submit this form without checking this box, you will be returned to the form and prompted to check it.

Terms of Service

OPENINGMASTER, CO. is the owner and operator of OPENINGMASTER.COM, an online chess community. Registered members of Opening Master can submit online chess games in database readable format and upload files to various sections of the website.

Modifications

OPENINGMASTER, CO. reserves the right to modify any part of this Agreement at any time in its sole discretion; this includes but is not limited to the graphic file storage term, and any Opening Master functionality. Any modification is effective immediately upon posting on this page. If any modification to this Agreement is unacceptable to you, you may immediately terminate the Services by closing your account. However, if you do not terminate the Services, or continue to use the Services following modification to this Agreement, your continued use will mean that you have accepted that modification. We will notify about any changes in the Opening Master Announcement section in Forum

Acceptable Use

Your use of the services provided by Opening Master is subject to the following agreement. Violations of this agreement may result in termination of your account with or without notice. Opening Master recommends that members maintain their own backups of any 'irreplaceable' content, as Opening Master cannot warrant that no loss or corruption of data shall occur.

Age Requirements

Use of Opening Master is limited to persons at least 13 years of age. Nobody under the age of 13 is allowed and no information of any person under the age of 13 will be knowingly collected by Opening Master. If you become aware of any person under the age of 13 who uses Opening Master, please contact us at This email address is being protected from spambots. You need JavaScript enabled to view it. to report such occurrences. Opening Master will immediately delete any information of and/or any accounts that we believe to belong to users under the age of 13.

Purchase

Purchase is available to anyone who provides all required information including your name, and an accurate and legitimate email address and credit card information.
The fees are non-refundable and we do not refund charges for unused services.

Prohibited Use

You may not use Opening Master (1) in any manner that violates any law, regulation, treaty or tariff or infringes on the legal rights of any third party, (2) in any manner which is defamatory, fraudulent, indecent, offensive or deceptive, (3) to threaten, harass, abuse or intimidate others, (4) to damage the name or reputation of Opening Master, OPENINGMASTER, CO., its affiliates, or subsidiaries, (5) to break security on any computer network, or to access an account that does not belong to you, and (6) in any manner that interferes with other customers' use and enjoyment of the services provided by Opening Master. (7) you may not copy / share or distribute databases without permission of the owner. (you may copy individual games - but not the large section or whole database)

Prohibited Content

As used herein, "content" shall mean all text, graphics (including avatars), photographs, pictures, drawings, animation, audio, video, and any other material submitted, posted, viewed, transmitted, reproduced and/or distributed by any person or entity in connection with OpeningMaster.
You are prohibited from storing, posting, distributing or transmitting any unlawful content at Opening Master. Examples of unlawful content include but are not limited to direct threats of physical harm, stalking, any kind of pornography, and copyrighted, trademarked and other proprietary material used without proper authorization.

As used herein, "pornography" shall mean any explicit depiction or exhibition of sexual activity and/or sexual imagery that is intended to stimulate erotic, rather than PURELY aesthetic or emotional feelings.
Other prohibited content includes but is not limited to: (1) programs containing Trojan horses, virus and/or tools to compromise the security of OpeningMaster and/or other sites, (2) solicitations or advertisements, (3) suggestions or encouragement of illegal activity, (4) private information about any individual such as phone numbers, addresses, Social Security numbers or any other private information, and (5) duplicative posting or "spamming". Please note, that you can not upload chess games for which you don't have copyrights. Read carefully 10 Big Myths about copyright explained by Brad Templeton.

Protection of Intellectual Property

Opening Master complies with The Digital Millennium Copyright Act (“DMCA”), respects the intellectual property rights and requires that all users respected DMCA and intellectual property rights of others. By using Opening Master services you certify that your use does not infringe upon anybodys intellectual property. Opening Master has been and will continue to vigorously enforce DMCA and to respond quickly to any allegations of intellectual property infringement.
Opening Master does not allow any copyright infringement and will, if notified properly and if not satisfied with a response by an accused party, remove or disable access to such content. OpeningMaster reserves the right to remove or disable access to content without prior notice as well as to terminate accounts and/or Opening Master membership of users whom Opening Master determines to be repeat infringers and/or violators any other clauses of Opening Master Terms of Service.
Opening Master may be required to disclose information to individuals asserting rights under the DMCA. By using Opening Master you authorize Opening Master to release information about you if required by law or subpoena, without any notice to you. By using Opening Master, you agree that you, and not Opening Master, are responsible for any violations of any intellectual property rights in any content that you upload to Opening Master.

If you believe that you the owner of intellectual property which was copied in such a way by someone on Opening Master site that such copying represents violation of your intellectual property rights, please This email address is being protected from spambots. You need JavaScript enabled to view it. with the following information included in your Claim Letter (please note that ALL information listed below is required from you in order for us to act upon your complaint):
    1.    Your/your company/organization name and contact information and a description of your rights including a signature of the owner of the claimed rights or a party duly authorized to act on behalf of the owner
    2.    A description of the property in question which you claim to be yours including the URL (location) of the media on Opening Master Website and a statement that you have a good faith belief that the use of said material has not been authorized by the copyright owner, its agent, or the Law
    3.    A statement by you (the owner or representative), made under penalty of perjury, that the above information in your Claim Letter is accurate and that you are either the owner of copyright or intellectual property or authorized to act on behalf of the owner.
Upon receipt of a proper notice as described above, Opening Master will confirm the existence of the alleged infringing content on Opening Master site, notify the user(-s) who posted the alleged infringing content, and take whatever action, in its sole discretion, it deems appropriate, including removal of the alleged infringing content from Opening Master site if Opening Master, at its sole discretion, deems evidence submitted in the claim sufficient and/or infringement obvious. A user who posted an alleged infringing content may respond to Opening Master notice by showing that either: (1) the infringing content has been removed or (2) the he/she has a an appropriate trademark registration or an appropriate valid license covering the use of the content or (3) that posting of the content does not, in fact, infringe upon the alleging party’s rights. If Opening Master determines, at its own full discretion, that the user who had posted content allegedly violating someone’s intellectual property rights, does not, in fact, infringe upon the alleging party’s rights and does not violate DMCA, then Opening Master will not remove, or will restore, the content in question.
Notwithstanding the foregoing, Opening Master will promptly comply with the terms of any court order relating to alleged trademark infringement by any user of Opening Master.

Protection of Opening Master database collection

Although chess players may freely copy individual games they may not copy the whole collection. Doing this is violation of copyright and work of OM. Several dummy games were inserted among entire collection of OM. These games were never played and are inserted there to identify the potential misuse or copy. (i.e. if these games appear in some other commercially known databases, it is clear the whole collection was copied)

Sales Taxes

OpeningMaster.com shall automatically charge applicable sales tax for orders to be delivered to addresses within European Union.
Opening Master may terminate any membership and delete any and all information, communications, postings, albums and image files at any time, without notice, for conduct violating this Agreement or other policies or guidelines set forth by OPENINGMASTER, CO. and elsewhere on the Opening Master web site.

Arbitration Clause

In the event a dispute shall arise between the parties to this agreement, it is hereby agreed that the dispute shall be referred to a European Union Arbitration office and/or Slovak Republic law court in accordance with the applicable Rules of Arbitration. The arbitrator's decision shall be final and legally binding and judgment may be entered thereon. Each party shall be responsible for its share of the arbitration fees in accordance with the applicable Rules of Arbitration. In the event a party fails to proceed with arbitration, unsuccessfully challenges the arbitrator's award, or fails to comply with the arbitrator's award, the other party is entitled to costs of suit, including a reasonable attorney's fee for having to compel arbitration or defend or enforce the award.

Force Majeure

Opening Master shall not be liable for any failure or delay in performance under this Agreement to the extent said failures or delays are proximately caused by causes beyond that party's reasonable control and occurring without its fault or negligence, including, without limitation, failure of suppliers, subcontractors, and carriers, or party to substantially meet its performance obligations under this Agreement, provided that, as a condition to the claim of non-liability, the party experiencing the difficulty shall give the other prompt written notice, with full details following the occurrence of the cause relied upon. Dates by which performance obligations are scheduled to be met will be extended for a period of time equal to the time lost due to any delay so caused.

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In recognition of the relative risks and benefits of Internet business to Opening Master, Co., the risks have been allocated such that you agree, to the fullest extent permitted by law, to limit the liability Opening Master for any and all claims, losses, costs, damages of any nature whatsoever or claims expenses from any cause or causes, including attorneys’ fees and costs and expert witness fees and costs, so that the total aggregate liability of Opening Master shall not exceed $500, or your total fees and costs, whichever is smaller. It is intended that this limitation apply to any and all liability or cause of action however alleged or arising, unless otherwise prohibited by law.

PROVISIONS OF THIS CHAPTER ("LIMITATION OF LIABILITY") SHALL SURVIVE THE TERMINATION OF YOUR RIGHT TO USE THIS SITE.
YOU ACKNOWLEDGE THAT YOU WILL BE FULLY LIABLE FOR ALL DAMAGES RESULTING DIRECTLY OR INDIRECTLY FROM YOUR USE OF THIS SITE.

Privacy

Opening Master and OPENINGMASTER, CO. will not release any details regarding the member to any third party, except as required by law. Opening Master and OPENINGMASTER, CO. understand and respect your desire for privacy. Opening Master and OPENINGMASTER, CO. will not disclose any content posted by you unless required to do so by law or in the good-faith belief that such action is necessary to: (1) comply with the law or comply with a legal process served on Opening Master, (2) protect and defend the rights of Opening Master and OPENINGMASTER, CO., or (3) act in an emergency to protect the personal safety of our guests or the public. Read our Privacy Policy.

Copyright and Trademark

It is the obligation of the individual members to ensure that the posting of their chess games, commentaries, photos, and videos is not violating any copyright. Members are solely responsible for the content of their inputs. If you feel a member is violating your copyright, please contact that member or This email address is being protected from spambots. You need JavaScript enabled to view it..

Opening Master and OPENINGMASTER, CO. claim no ownership rights in the content you place on your Opening Master forums or groups and/or documents. We will not use Member's images for marketing purposes or any other purposes without obtaining the Member's express permission.

Opening Master is a registered trademark, and other OPENINGMASTER.COM and OPENINGMASTER, CO. product names, service names, slogans or logos referenced in this web site are trademarks or registered trademarks of OPENINGMASTER, CO. All other company, product or service names referenced in this web site are used for identification purposes only and are trademarks of their respective owners.

All images, text and any other content on this site are protected by copyright, trademark, patent or other proprietary rights and laws. Opening Master and OPENINGMASTER, CO. reserves its rights in and to all other content contained in the web site. Unless otherwise noted, all content, other than that contained in the Member's games submissions, is copyrighted by Opening Master: © OPENINGMASTER, CO. All Rights Reserved.

  • About
  • Team
  • FAQ
image Modern. Powerful.

About Opening Master

Made in Power

Made in Chess

The Opening Master is the biggest human chess database collection of the world. It has been carefully collected over the past 11 years with focus on quality and quantity. More than 24 million of human chess games

Meet the team.

The founders of Opening Master chess database have been playing chess for more than 30 years each and are recognized international players.

image Alexander Horvath Founder

image Alex Horvath CEO

image Jan Helbich Lead Developer

image Slavka Hulecova Senior Analyst

Flexible & Adaptable chess databases

There are a series of smaller chess databases beyond the large OM GOLEM, to show how flexible the database system is, choose best plan for you and start playing.

Chess Base formats

The most popular chess database software can work with our chess databases

Chess Assistant formats

Those who prefer analysis with Chess Assistant we have formats. Also for SCID users a free PGN formats are supplied.

Why Opening Master

  • It's biggest +

    Yes, we have reached the massive collection of more than 24 million human chess games.
  • It's baddest +

    If you are standard or professional ICCF players, the OM CORR database with 1,7 million
  • Over the board +

    The FIDE collection or OM OTB with more than 8 million games. This is the
  • Top Notch Support +

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

  • Great chess databases! Greetings from Portland, Oregon, USA and the Portland Chess Club. Jonathan Ray Fortune (Correspondence Chess Master (CM), United States Chess Federation)
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