if so, the commentators were all wrong about the ref. wu should have warned felix himself, as the ref said. so then comes the other question; if you make three fouls and the opponent doesn't warn you on the second, doesn't even realize you have then three fouled.. what's the right thing to do, in terms of sportmanship?
not saying felix did wrong, he possibly was unaware himself (which can sometimes happen when one foul is a scratch/break foul and the others are failed safety returns).
I don’t know if Vogel also slept the foul count. But on the sportsmanship question, I just don’t see this an issue at all. The rules are crystal clear that the warning is mandatory and that without the warning you are still on 2. I just don’t understand how anyone would expect a professional or serious amateur to ignore the rule and concede the game.
To me this is very different than something like touching a ball when nobody sees, or hitting the wrong ball etc. Those are fouls under the rules and the fact that a ref wasn’t called or the referee missed it doesn’t change that fact. IMO sportsmanship does require you to admit that foul.
I have once, and only once, conceded a serious game on 3 fouls when no warning was given. I was playing in a tournament and losing to a good snooker player who was new to the country and the game and clearly didn’t know the full rules of 9b. He played for 3 fouls and got the 3rd foul but hadn’t warned me. In that rare circumstance I gave him the game and explained the rule. I didn’t want to take advantage of his newness. I would not have done so if I thought he knew the rules and just forgot. And if I was playing a professional tournament I’d never have done it even then - you have to know the rules.