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Editor: Dr Tim Harding
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Improved UltraCorr-X database is now available on this website

A slightly revised edition of Ultracorr-X is launched today. It can now be downloaded as a single encrypted file (we send you the password when you pay) or you can buy it on a CD-ROM. The revised version has improved editing of player an tournament names, enabling us to delete a few thousand duplicates, and there are about 150 new games compated with last month's version.

The database includes over 1,750,000 games, by about 123,000 players, played between the early 1800s and August 2017. More than 30,000 games have substantial annotations and about 100,000 have some light notes.

Games from ICCF are only part of the collection which also includes thousands of games from IECG (the full database), IECC, LSS and other modern and historic sources.

Read more about UltraCorr-X.

Technical points.

Download the database.

Buy UltraCorr-X and receive the last key file.

The history of UltraCorr databases

Tim Harding's correspondence chess databases used to be famous as the largest and most accurate collections of CC games to be made available.

Each was larger than the previous version and took months of work to compile, check, and edit. It is now seven years since the last revision.

Correspondence players need a reliable large database to prepare specifically for future opponents.

Over-the-board players need to consult a good CC database to see where computer-guided innovations have transformed many critical opening variations. The use of CC databases by several of the authors of Quality Chess books is testament to this.

A reliable CC database is also an important historical resource for chess historians.

Now the wait is over!!

Ultracorr-X is ready and available for purchase and download, from this website only. The price of 55 Euro may seem high but it reflects the highly labour-intensive nature of the work, over several months, that was required to prepare it, adding new games and elininating many of the errors that have marred previous offerings by competitors.

This database is only available in ChessBase format. We cannot supply in PGN because the file would be unmanageably large.

There were four biannual editions of the MegaCorr series between 1999 and 2003, sold chiefly to subscribers of our printed magazine Chess Mail. After the magazine closed, we produced three editions of an even larger collection, Ultracorr, up to 2007.

After that we were too busy with historical research and writing to publish any more but we always kept our personal collection up to date. Over the last six months we have been improving the data quality and eliminating doubles, especially correcting erroneous data found in other published CC databases.

It is impossible to make such a large database totally accurate and to eliminate all doubles but we believe that UltraCorr-X is the most reliable database of correspondence games ever issued, of value to correspondence and over-the-board players alike.