Fun game to look at. I don't play this line as black, but it's been repeated in modern games.
I think black took for granted the c5 move or perhaps missed 12.Bxf6, decoying a piece away from c5 and starting a series of exchanges. c5 could have been played on move 10 or 11.
I wonder how black judged the position at move 17. Seemingly everything has gone according to plan. White's trumps may not have been noticed yet. To me the queen and c1 rook stick out the most as being better than their counterparts. I'm not thinking of winning a B vs N endgame yet... but interestingly Capa uses a nice little sequence to jujitsu it into just this.
In my games it always seems if my pieces are a little better it means I have some pressure. Amazing that Capa makes better pieces look like a forced win. I looked at some variations trying to find a defense for black... even trying to help him out a little like 18.0-0 and the illegal 18...Bf6 as a reply. It's instructive how poorly the bishop preforms even here. While the knight can dance on the queenside, threatening pawns and aiding infiltration, the bishop has no targets, little to no scope, and isn't aiding or preventing any infiltration. Sure the bishop didn't look geat, but reviewing this game a bit was a good lesson for me, seeing how impotent the bishop really was.
I came across this Capablanca game while studying using Guess The Move. This game highlights both his preference for simplification whenever possible and his amazing endgame skills. Very cool game.
http://chesstempo.com/gamedb/game/2882455/rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR%20w%20KQkq%20-%200%201