Recover all available historic tournaments and save the games in a unified format

[Debilski]

I don’t see that guarantee as a thing we should care about. What would be the long-term use case?

fix a bug in a bot 10 years after the facts maybe or replay that game at the tournament in Heraklion to your grand-children ;)

We have most tournaments available somewhere. They should be collected and the match data should be transformed into a common format.
Since we now have a React.js SVG viewer for games, we can also relatively easily make a website where these matches could be replayed (Github pages could do that automatically).