So was robbed
If he hadn't been forfeited, he would have won the US Championship.
English is not his first language.
He didn't understand that 'don't write on the scoresheet' didn't mean 'don't write at all'.
He should have appealed and won the appeal to replay the game.
Add to that the fact that he had extreme family challenges this weekend.
Very unfortunate that the arbeiter didn't make sure he was actually understood.