This variant is now playable on www.govariants.com !
Here’s the necessary steps:
On the landing page, select badukWithAbstractBoard and click Create Game.
You will be navigated to the game page. Send the URL to a friend you want to play with. Both of you need to click Remember me and take a seat. Then just start playing! (Don’t be startled if an error pops up when you try to play a move when its not your turn)
Currently changing the game parameters has no effect, but in future you will be able to customize komi, board size etc. in the game config on the landing page.