Here is a game I played today on chessbase which illustrates some modern themes in the Gruenfeld Defense. The game began 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cd Nxd5 5 e4 NxN 6 bc Bg7 7 Nf3 Back in 1970s when I used to play the Gruenfeld, this was considered a blunder. Now, however, this is the most popular move for white. All major alternatives score about 55% for white.
7...0-0 (7...c5 is preferred 8:1.) 8 Bc4 Other moves are preferred, and score better (8 Bc4 scores only 40% for white!). Most usual is 8 Be2.
8...c5 9 0-0 Nc6 10 Be3 cd 11 cd Bg4 12 Rb1 Five different moves have been played here, but this seems the most principled. White seeks to pressure the b-pawn which black left unprotected when he played 11...Bg4.
12...b6 12...Nxd4 and 12...Bxf3 have been played. My move is perhaps too passive.
13 d5 Ne5 14 Be2 Rc8 15 Bf4 NxN+ 16 BxN BxB 17 QxB Rc2 18 Qa3 Re8? (18...Qd7=) 19 Qxa7 Qa8 20 Qxb6 Qxa2 21 Qb5 Rec8 22 Qd7 h5 (22...Bd4) 23 Qxe7 Rxf2! 24 RxR?? Mate is now forced. 24 Bg3 would have preserved white's one-point advantage, though this is a hard move to find in a blitz game.
The game ended 24...QxR+ 25 Rf1 Bd4+ 26 Be3 BxB+ 27 Kh1 QxR#.
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