I agree with you that both teams looked tired. Kings played 21 games.
But this concept of Chicago choking has another side to it: They played a resilient team that doesn't quit, knows how to win and kept coming.
I just happen to think the Kings are a very hard team to beat 4 times. I think the Sharks, Blues and Hawks would agree. As would all the teams they played 2 years ago.
I don't think Chicago choked but you might be right both teams might be tired. The Kings looked pretty strong in the 3rd though and nobody has played more games.
Call me crazy but I don't love playing teams with core players that have been thru the wars and know how to win