14500 games on lichess! You can play against it on lichess (if it is active), because of the AWS bills, it is only active around 5-6 days of a month. You can also download the polyglot opening book that catriever is using for its games on lichess down the below, download for free and use it for your own engine. It has over 100.000 master games.
Play with cat on Lichess!
Immortal of bot? Do you want to see how tactical is it? After seeing it you will know what to expect from it. Can you guess what it is?
Yes. Boom!
You can look at the game here:
You can download masters.pgn here, it is a collection of games, selected from master games, 1800s to 2023. There are over 100.000 openings, also there are some duplicates but it is giving a weight to important masters games. You can analyse, use it in your opening study, cleaning, implementing new games etc. This is taken mainly from millionbase-2.22.pgn and pgnmentor.com. Huge shoutout to them for these amazing resources for chess community.
Polyglot book format. .bin file to use it with your engine. On lichess both weighted_random and best_move options should work great, it is mainly taken from 2650+ master games. There are also historical games from 1800's and even Carlsen's, Nakamura's online games around pandemic and 2022, 2023. There shouldn't be any issue to use this Catbook.bin, feel free to use for your engine add a strong opening book. When creating the masters.pgn Scid Software was used, quite useful and easy to work with data; and for polyglot book creation Banksia GUI was working flawless. Thanks to them. Yeah, download and use for your engine for free.