OCA2 archive

[jimloy]

OCA2 is the Open Checkers Archive 2.0, which contains 22,621 games. I lost track of where it is stored on the Internet. It didn't go anywhere, I just couldn't find it. I wanted to store it on the ACF Forum, but it was too large and cumbersome for this site. Well, I found it again (thanks to Ryan Pronk's YouTube channel), at http://www.fierz.ch/download.php about 2/3 of the way down the page. Download it from there. It is fairly large, but it shouldn't be a problem for your hard disk. It has to be unzipped, once you get it onto your hard disk. There are several ways to unzip, including the free version of the WinZip. You can look at it with WordPad (it is too big for NotePad) just like a txt file, even though it probably has a pdn or pgn extension after unzipping. Change the extension to suit your purpose.

[williamdocherty]

Hi Jim,

I was using this until recently with the 22 000 or so games in checkerboard to search positions.

Thanks to your fantastic work here on the forum of posting many tournement games & books in PDN which are not to be tound in the original OCA, and other additions of my own, I now have around 53 000 games to search positions from!
There are of course duplicates there, and I am currently importing the 53 000 games into Excel to elimnate the duplicates and obtain a final unique database 01 July 2023.

Thanks for all your great work, and I hope you'll be keeping on posting fresh ty PDN's

Regards
William