Chessola

A33: 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6
Larry Christiansen seems to understand this variation. Here are a few examples:

Christiansen Larry M (USA) - Cleghorn Peter [A33/14]
Lone Pine, 1976
1.c4 Nf6 2.Nc3 c5 3.g3 Nc6 4.Nf3 e6 5.d4 cxd4 6.Nxd4 Bc5 7.Nb3 Bb4 8.Bg2 d5 9.cxd5 Nxd5 10.a3 Bxc3+ 11.bxc3 Qf6 12.0–0 Qxc3 13.Bd2 Qb2 14.e4 Nde7

14...Nc3 looks playable, but I imagine Black wanted to keep the queen's retreat open. If so, this isn't the way to do it.

15.Rc1 0–0

It was high time to get out of Dodge.

16.Bc3 1-0

After 16...Qxa3 17.Ra1 the queen is trapped since she can no longer retreat to e7!

Christiansen Larry M (USA) - Leverett B [A33/20]
Columbus op, 1977
1.c4 c5 2.Nf3 e6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 Nf6 6.g3 Qb6 7.Nb3 Bb4 8.Bg2 Ne5 9.Be3 Qc7 10.c5 Nc4 11.Bg5 Bxc5 12.Nxc5 Qxc5 13.Bxf6 gxf6 14.Rc1 Qe5 15.0–0 0–0 16.b3 Na5 17.f4 Qe3+ 18.Kh1 d5 19.Rf3 Qb6 20.e4 d4 21.Na4 Qd8 22.e5 fxe5 23.fxe5 Bd7 24.Rf4 Bc6 25.Qh5 Bxg2+ 26.Kxg2 Qd5+ 27.Kh3 f5 28.Rc7 Qxe5

Not as if it mattered; mate is forced in any event.

29.Qxh7# 1–0

Christiansen Larry M (USA) - Radulov I [A33/14]
Surakarta/Denpasar 33/68, 1982
1.c4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3 Bc5 7.Nb3 Bb4 8.Bg2 d5 9.cxd5 Nxd5 10.0–0 Nxc3 11.bxc3 Qxd1 12.Rxd1 Bxc3 13.Rb1 0–0 14.Nc5 Nd8 15.Ba3 Re8 16.Na6 Ba5 17.Rb5 bxa6 18.Rxa5 Rb8 19.Rc5 h6 20.Rc7 e5 21.Re7

Trading rooks down a pawn? Ah, but White has something up his sleeve--he never recaptures the rook!

21...Rxe7 22.Rxd8+ Kh7 23.Be4+

Of course not. 23.Bxe7 Rb1+ But now the king has a flight square, so Black must attack the bishop.

23...f5 24.Rxc8 Rxc8 25.Bxf5+ g6 26.Bxc8 Rc7 27.Be6 Rc2 28.e4 a5 29.Bd5 Kg7 30.h4 g5 31.Kg2 gxh4 32.gxh4 h5 33.Be7 a4 34.Bg5 a6 35.Kf3 Rc3+ 36.Ke2 Rh3 37.f3 Rh2+ 38.Ke3 Kg6 39.Be6 Rg2 40.f4 Rg3+ 41.Kf2 exf4 42.Bxf4 Rc3 43.Bg5 a3 44.Ke2 a5 45.Kd2 Rc6 46.Bd5 Rb6 47.Kc3 1–0

Christiansen Larry M (USA) - Tolnai Tibor (HUN) [A33/16]
Ch World (team) Lucerne (Switzerland), 1989
1.c4 c5 2.Nf3 Nf6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 e6 6.g3 Qb6 7.Ndb5 Bc5 8.Nd6+ Ke7 9.Nde4 Nxe4 10.Nxe4 Bb4+ 11.Bd2 d5 12.cxd5 exd5 13.Nc3 Be6 14.Bg2 Rhd8 15.0–0 Kf8 16.Na4 Qa5 17.Bxb4+ Qxb4 18.Rc1 Qe7 19.Nc5 Rac8 20.Qa4 a6 21.Rfd1 Ne5 22.Qd4 Nc4 23.Nd3 Kg8 24.Nf4 h6 25.Bxd5 Bxd5 26.Nxd5 Qxe2 27.Re1 Nd2

Ingenious; White doesn't get much after either 28.Rxc8 Qxe1+, or 28.Rxe2 Nf3+. But there is a shot!

28.Nf6+! 1-0

After 26...gxf6 27.Qxd8+ takes the rook with check, forces the other rook off the c-file, and eliminates the knight fork.

So what is Black to do? Christiansen can show you that, too.

Gschnitzer O - Christiansen Larry M (USA) [A33/12]
Bundesliga, 1991
1.Nf3 c5 2.c4 Nf6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 e6 6.g3 Bc5 7.Nb3 Be7 8.Bg2 0–0 9.0–0 d6 10.Bf4 h6 11.Rc1 Re8 12.Qc2 e5 13.Bd2 a5 14.Nb5 a4 15.Na1

Knight on the rim is dim. Knight in the corner's a gorner.

15...Bg4 16.Rfe1 Bf8 17.h3 Be6 18.Red1 Qc8 19.Kh2 d5 20.cxd5 Bxd5 21.Bxd5 Nxd5 22.Qe4 Nf6 23.Qc4 Qf5 24.Be3 Rec8 25.g4 Qg6 26.Qc2 e4 27.Bf4 Ra5 28.Nd6 Nxg4+ 29.hxg4 Qxg4 30.Bg3 Rh5+ 31.Kg1 Nd4 32.Qxe4 Qh3 33.Qg2 Rxc1 34.Qxh3 Rxd1+! 0-1

If the king tries to protect the queen, a rook check or two will lure it away.

And, if you're in a hurry:

GulkovIgor (2243) - LarryC (2549) [A33]
ICC 5 0 Internet Chess Club, 02.06.2003
1.Nf3 c5 2.c4 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3 Qb6 7.Nb3 Ne5 8.e4 Bb4 9.Qe2 a5 10.f4 a4 11.fxe5 axb3 12.exf6 Rxa2 13.fxg7 Rg8 14.Rb1 Bxc3+ 15.Kd1 Rxg7 16.Qd3 Bd4 17.Bh3 d6 18.Rf1 Bd7 19.Rf3 Qc5 20.Be3 Bxe3 21.Rxe3 Qe5 22.Kc1 Ra4 23.Qc3 Qc5 24.Kd2 Rxc4 25.Qxb3 Ba4 26.Qd3 Bc2 0–1

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