< 13. ..Qxe4?! >
Naka is trying to get tricky with the wrong guy.
Garry was schooled by Bronstein, Botvinnik, Karpov, Korchnoi, Keres, Tal, and Smyslov. He understands tricky.
What Naka thought was 3 pawns for the piece was..
< 17.Bxc7 >
..was only two!
< 27.Rc4 >
Surround and capture (d4). But is there more?
< 28. ..Nh4 >
Naka is outnumbered on d4, so the threat is to fork on f3 if white captures.
< 29. ..Ka6 >
What is the point? Why play this move? Black seeks to get the K off the 5th rank so that if there is an exchange on d4 followed by Nxf3
white will not have Rd5+ and Rf5 attacking the N and f7
< 33.Nxd4 >
Although white had the d4 pawn under control, he sought to expand his control. The rest of the game is a masterly demonstration of restraint and reduction. Of course the final blunder ..b3? could have been avoided but the inevitable could not.