The OM OTB with 8 million chess games is the biggest over the board played games collection one could come up with. It all began in 2004 when creators started to collect games and analyze them into single chess database. The origin of name "OM OTB" dates back to October 2011 when OM XXL was split between OM OTB and OM CORR. The chess database was cleaned of all correspondence and portal games and left only pure human over-the-board chess games. Some chess players consider this database as the strongest available. We update the chess database bi-monthly and usually increase by 100K games. During this time we clean the shop, index the files, correct names, on other words make it better than the version before.

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Chess database Matrix Specifics

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 TOP 2300
Type of Subscription
BASIC
BASIC
BASIC
STANDARD
STANDARD
STANDARD
STANDARD
ULTIMATE
ULTIMATE
ULTIMATE
ULTIMATE
ULTIMATE
Number of games
7,600,674
1,613,952
1,107,088
26,501,780
7,600,674
1,572,820
15,534,494
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
Jan 13, 2015
Jan 30, 2017
Apr 19, 2016
Feb 18, 2016
Oct 19, 2015
Jan 30, 2017
Oct 7, 2017
April 25, 2017
July 6, 2017
April 28, 2015
Update Frequency
Annually
Annually
Annually
Annually
Annually
Annually
Annually
biMonthly
biMonthly
biMonthly
biMonthly
biMonthly

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