So, on the National Chess Championship Dennis won one more game (game #7). All the games he won there he played black. Game #6 was very dramatic - Dennis lost it. I will try to convince him to comment it and put here. So, Dennis has 4 out of 7.
Artem won 2 more games and has 4.5 out of 7.
Father of Kevin Yan, Dennis opponent in the game #2 send a photo of Dennis and Kevin before the game.
Here it is:

Many thanks to Rocky Yan!