Finally got my 3-turn solution work!

Final

(1) vesuvio vs (2) Deadcode

That round was close to the end, taner had a big lead and it was you who dropped.

Which game ID is the free win?

probably this one (the same map)? https://www.tus-wa.com/leagues/game-235042/

Since it was unclear if it was a sitter, I think it's ok to keep playing and check the situation after the game. Then put the rule in effect if needed. If you throw a sitter, you have to use a turn to shoot yourself for the same damage (or skip a turn and reduce the same damage so that you die at X HP). Losing a turn on top of HP reduction is important because it could be otherwise beneficial to throw sitters. In similar cases (e.g. unclear if a player touched a wall in WxW) we have changed the result afterwards when someone didn't skip a turn and he was 1 turn away from dying at the end of the game.

We've finally reached the semifinal stage.

Semifinals

(1) Senator vs (4) Chicken23
(6) Zwitter vs (7) djongador 3:0

I forgot that I need to play CWT playoffs either this Sunday or the following one. I'll let you know when my opponent confirms.