Gruenfeld, Ernst – Alekhine, Alexander,
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7
4…Nbd7 can also be played here as White can’t win the pawn on d5: 5.cxd5 exd5 6.Nxd5 Nxd5 7.Bxd8 Bb4+ wins piece.
5.Nf3 Nbd7 6.e3 0–0 7.Rc1
A well known tempo struggle begins; White wants to develop his bishop when he captures the pawn on c4 while Black refrains from taking on c4 until White’s light square bishop has moved.
7…c6 8.Qc2 a6 9.a3 h6 10.Bh4 Re8 11.Bd3 dxc4
Gaining a tempo, but now White has a majority in the center. It is truly said that chess is a generalized exchange.
12.Bxc4 b5 13.Ba2 c5
Freeing Black’s game with the c5 lever. 13…Bb7 14.0–0 c5 is also playable.
14.Rd1 cxd4 15.Nxd4 Qb6 16.Bb1 Bb7 17.0–0 Rac8
With a threat of Be4.
Improving the position of this piece by heading to c4. The knight was not doing much on d7.
19.Bxf6 Bxf6 20.Qc2 g6
Though the pawn structure around Black’s king is slightly weakened by this there is no way White can exploit it. A weakness is only a weakness if it can be targeted.
21.Qe2 Nc4 22.Be4 Bg7
22…Bxe4 23.Nxe4 Bg7 is also possible.
23.Bxb7 Qxb7 24.Rc1 e5 25.Nb3 e4!
Creating a nice outpost on d3 which can be used by knight.
26.Nd4 Red8 27.Rfd1 Ne5 28.Na2 Nd3 29.Rxc8 Qxc8
“Grünfeld, completely outplayed by his mighty opponent, correctly seeks his last chance in destroying Black’s powerful fore post on d3. Note that a protected knight on d3 or e3 (respectively e6 or d6) is normally worth an exchange because of its ability to paralyze the opponent’s activity and to participate in dangerous combinations.”
Here Kasparov suggests 30.Nc3 as an improvement which might lead to pawn down queen endgame for White. If you have Chessbase you can check the variations given by Kasparov.
Black’s rook can’t be taken because of 31.exd4 Bxd4+ 32.Kf1 Nf4 33.Rc1 Qxc1+ 34.Nxc1 Nxe2 35.Nxe2 Bxb2 which gives a winning endgame with two extra pawns.
Pause for a moment and try to find the winning continuation for Black
31…Nf4!! 32.exf4 Qc4!
White is at least losing a piece.
33…Rxd1+ 34.Qf1 Bd4+
And mate on the next move.