Leela played stockfish 200 games and won with 106 - 94 [1]. Not sure which version of stockfish was used.
Some of the Leela-Stockfish games are analyzed by agadmator on YouTube [2].
[1] https://www.chess.com/news/view/13th-computer-chess-champion...
Some of the Leela-Stockfish games are analyzed by agadmator on YouTube [2].
[1] https://www.chess.com/news/view/13th-computer-chess-champion...
Traditionally this wasn't a big problem as every engine was more or less optimised for a fast Intel CPU with a moderate to large amount of RAM. The organisers would decree the specs of the championship hardware some time in advance. Now, (at least for TCEC, the other major engine tournament) they pick two hardware configurations, one CPU-heavy and one GPU-heavy, and give each team the choice.
How do you balance those? It's been suggested you should make them equal in terms of watts of power, or dollar cost to buy, but neither of those are obviously best. In practice the TCEC organisers pick something close to what they picked last time but shade it against the winning engines, making the contest more even. Chess.com likely do something similar though they're less rigorous about the details.
Do they give these computers a rating like they do human players?
Note that the numbers aren't calibrated to human players, so there's no claim that an engine with a rating of 3100 on some particular hardware should score 85% against a human rated 2800, or whatever.
[0] http://ssdf.bosjo.net/list.htm [1] https://ccrl.chessdom.com/ccrl/404FRC/ [2] http://www.cegt.net/40_40%20Rating%20List/40_40%20SingleVers...
There is a current tournament going on at tcec-chess.com/ which stockfish has been leading so far, but I see Leela has just caught up in the head to head.
Of course Leela also keeps evolving.