Also all the other Avengers not in the movies
Which Avenger would be the best at chess

JK. In all seriousness, I think it would be a close match between Cap and Stark. Stark is supposedly some kind of genius (debatable :P), but Cap is military and a great strategist. I'm leaning toward Cap for the win. ;)

Initially I was leaning towards Ironman, but thought he might spend too much time looking in the mirror than at the chess board. I reckon Hawkeye because he isn't a classic superhero with natural abilities and always survives on his cunning, and as chess is a visual game, the clue is partly in his name !
So on the basis of whether the hero is a : A woman, an American, a raging animal,a cunning survivor, a preening dandy or a deluded demigod... without fear of being controversial I put them in this order:
1 Hawkeye
2 Ironman
3 Hulk
4 Thor
4 Blackwidow
5 Captain America

Initially I was leaning towards Ironman, but thought he might spend too much time looking in the mirror than at the chess board. I reckon Hawkeye because he isn't a classic superhero with natural abilities and always survives on his cunning, and as chess is a visual game, the clue is partly in his name !
So on the basis of whether the hero is a : A woman, an American, a raging animal,a cunning survivor, a preening dandy or a deluded demigod... without fear of being controversial I put them in this order:
1 Hawkeye
2 Ironman
3 Hulk
4 Thor
4 Blackwidow
5 Captain America
Ah, but you're forgetting that Black Widow is a former Russian secret agent. And with the Russian government's long history of promoting chess among government employees and the general public, it's quite likely that Black Widow has some considerable chess playing experience.
Out of Ironman, Hulk, Thor, Blackwidow, Hawkeye, and Captain America who would be the best at chess.