Platinum Plan For Chess Base users
Gold Plan For Chess Base users
Silver Plan For Mac users
Bronze Plan For Chess Assistant users
Blue Plan For SCID users
Most used functions 
Classification of games 
How to annotate a game 
How to create opening report 
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7.7 million of top human chess games
The exciting new Opening Master chess database features a unique chess games collection with more than 7.7 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 6 years of research and development. All synchronized real time via cloud.
Chess Database extensions
A wide selection of Chess Database extensions starting with most widely used Chess Base and followed by Chess Assistant. Don't forget free SCID (pgn) version. Windows users, MAC users? No problem. We have it. Our large portfolio opening reports can be viewed in PDF files. Each month the databases are upgraded so you stay up-to-date with most fresh information. It's all being now synchronized through Cloud Service provided by DropBox. Preview all the addons below.
Cloud Service via DropBox
Our unique chess databases are synchronized to your computer automatically whenever we release the new version. All premiere members have special access to shared folder on DropBox account which enable them to download or synchronize all powerfull databases in various extensions according to their plan. And even more, now you can have access to your shared folder from multiple destinations or computers, notebooks, iPhones, iPads etc. True cloud service synchronized real time. Our annual programs start as low as 26,90 EUR.
The complete collection of Nalimov 6-men tablebase
Yes, we did it again. It took us some time and resources to find all 6-men tablebase. Now we can say "we have them ALL" Don't make compromise with 5-men or some big DVD selection while you can make the whole collection. We are talking 1.2 terabytes (1200 GB) of data, so forget DVDs. We can send you hard drive. (no possibility to download such huge piece).
Powered by Opening Master
The foundation of every modern chess correspondence fedaration is strong chess database. It all started with signing 3 years agreement (2008-2010) to sponsor International Correspondence Chess Federation (ICCF.com ) wordwide to provide chess databases to various ICCF tournaments.Throughout the history of OM, following chess fedarations were sponsored individually: USA, Argentina, Great Britain, Czech Republic, Spain, Slovakia, Romania, Scotland etc... If you think you would like to partner with us, just let us know.
Largest Database
Extensions
Cloud Service
Nalimov 6-men- Federations
OM GOLEM, OM OTB, OM CORR, FIDE 100, ICCF 200, OM Portal and OM Centaur. Subscribe for €59,90
OM GOLEM, OM OTB, OM CORR, Golem 2300. Converted to CBF for EXACHESS / MAC users. Subscribe for €29,90
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Google rated Opening Master #1
21 January 2012
Opening Master was recenlty rated as # 1 on Google.com for it's "largest chess database". We are very proud and hope to keep the top position for a while. Since the incenption we have focused primarily on providing quality games rather then quantity, although over the years we reached the critical mass of 7.7 millions of games. This is something which no other database can claim - so many human games under one roof.
The 7th European Team Chess Championship under ICCF flagship started 31.12.2008. There were 15 country groups playing to get VII. European ICCF Champion title. 
OM news:
OpeningMaster Family
| OM Version | Vol. | # games | Released |
| OM GOLEM | 2.15 |
7,665.905 | Dec 12, 2011 |
| OM OTB | 1.04 |
5,857.167
|
Jan 2, 2012 |
| OM Corr | 2.16 | 1,130.773 | Jan 21, 2012 |
| OM ICCF 200 | 2.0.3 | 25.515 | Nov 17, 2010 |
| OM Portal | 12.11 | 752.499 | Dec 20, 2011 |
| OM FIDE 100 |
1.0.3 |
119.314 |
Sept 23, 2011 |
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Keres Attack
It is a dangerous weapon against the Scheveningen an requires boldness, enterprising play and exactness from both side - attack and defence. The early and aggressive advance of...
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