Saturday, August 6, 2016

Gruenfeld Fianchetto 3.g3 O'Hearn

A good method of development for White in chess is to play 1.d4 followed by kingside fianchetto, castling, and c4. This deployment is very flexible. It can begin 1.d4, 1.c4, 1.Nf3 or 1.g3. When Jim O’Hearn opened in this manner in our 1979 APCT postal game, I responded with the Gruenfeld Defence. After move five the position was symmetrical.

White played the thematic 6.c4. Black has the choice between 6…c6 and 6…dxc4. The solid 6…c6 7.cxd5 cxd5 leaves White with the one tempo advantage of making the next move. I chose 6…dxc4. This pawn grab is temporary. White recaptured the pawn with 7.Na3 and 8.Nxc4 and built up a pawn center.

When White allowed Black to play 20…Nd3, White sacrificed the Exchange. Then Black destroyed the pawn center and won. In other games vs Jim O'Hearn I played White in a Nimzo-Indian Defence and Black in a Dutch Defence.

O'Hearn (1822) - Sawyer (2000), corr APCT 1979 begins 1.Nf3 Nf6 2.d4 g6 3.g3 Bg7 4.Bg2 0-0 5.0-0 d5 6.c4 dxc4 [6...c6 7.cxd5 cxd5 8.Nc3=] 7.Na3 Na6 [7...Nc6 8.Nxc4 Bf5=] 8.Nxc4 c5 9.Bf4  [9.b3 Bf5 10.Bb2 Be4=] 9...Be6 [9...Nd5=] 10.Ne3 Nh5 [10...Nd5=] 11.d5 Nxf4 12.gxf4 Bd7 13.Ne5 Qc8 14.Nxd7 Qxd7 15.Nc4 Rad8 16.e4 Qc7 17.e5 b5 18.Ne3 Nb4 19.Qe2 [19.a3+/=] 19...c4 20.Rfd1 Nd3 21.Rxd3 cxd3 22.Qxd3 Qc5 23.Bf1? [23.Qd2 Rc8=/+] 23...Qb4 24.Ng2 a6 25.Rd1 Qxb2 26.Rd2 Qb4 27.a3 Qa4 28.Qe3 Kh8 29.Ne1 f5?! [29...Rc8-+] 30.Rd4 Qa5 31.h4 Qb6 32.Nf3 h6 33.Qd3 Rd7 34.Bg2 Rc8? [34...Qc5-/+] 35.Qd2? [White had a chance for 35.h5!=] 35...Qc5 36.Rd3 Qc1+ 37.Qxc1 Rxc1+ 38.Kh2 Rc5 39.d6 exd6 40.exd6 Kh7 41.h5 gxh5 42.Nh4 Bf8 43.Nxf5 Kg6 44.Be4 Kf6 0-1

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