Karpova: very instructive game!
12...bg4 (nh4 now or on the next move was better)
14...bg5? black commits a mistake after white's excellent move.
15.h3! this is the point! 15...bf4: fails due to 16.ef and the bg4 gets trapped (see move 12).
19.na4! an excellent move. it's obvious that black's queenside is pretty weak.
20....ne6? black would still have drawing chances after 20....a5 or 20...bd8
23.b4!! great play by rubinstein! (23...bc7 24.bc7: nc7: 25.nc5 nc5: 26.bc and white wins by attacking on the b-file)
24.nb2! rubinstein plays the endgame in admirable style.
35.g4! since black is tied up on the queenside, white begins to play on the kingside - decisive!
38...gf (38...g5 39.nc4!)
this game should be studied very carefully!
