In our final video on the U.S. Championships, FM Melekhina and FM Liu show related positions and ideas, but different outcomes. When is the king safe on f8 and when is he not? Who played for a win when he only needed a draw and who took the perpetual? And who missed mate in 17 in an Armageddon game?! OK, we all would have missed that! Watch and see all the moments that were worthy of examination!