1.c4 grabs the d5 square from the side and keeps the centre flexible. White usually fianchettoes the king's bishop on g2 and plays on the queenside and the long light diagonal, often reaching a Sicilian with an extra tempo. This is a intermediate opening course for White (ECO A10-A39) with 6 variations and 3 traps, written for players rated around 1500. Each move is explained and then drilled on a board; it is free.
Key ideas of English Opening
Control d5 with c4 and Nc3; a knight landing on d5 is often the key to White's play.
Fianchetto with g3 and Bg2: the bishop rakes the long diagonal toward b7 and a8 and supports the d5 square.
Against ...e5 setups, expand on the queenside with a3, Rb1 and b4-b5, using the extra tempo of a reversed Sicilian.
Against symmetrical setups, the queenside pawn majority and the half-open c- and b-files decide; the d4 break must be well timed.
In the Botvinnik setup (c4, e4, Nc3, g3, Bg2, Nge2), White locks d5 and plays either f4 on the kingside or b4 on the queenside.
Keep pieces flexible: many lines transpose, so learn the plans and typical structures, not only move orders.
Variations you learn
Reversed Sicilian: Four Knights with 4.g3 Bb4 – 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O …. Black pins the c3 knight and gains space with ...e4. White accepts doubled c-pawns for the bishop pair and breaks with f3 and d3, a line played in several Kasparov-Karpov world championship games.
Reversed Sicilian: Reversed Dragon with 3.g3 d5 – 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 …. Black plays an Open Sicilian Dragon with colours reversed. White uses the extra tempo for a quick queenside expansion with a3, b4 and b5, aiming at the c6 knight and the e5 pawn.
Symmetrical: Fianchetto Variation – 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 …. Both sides mirror each other with fianchettoed bishops. White uses the move advantage to start the queenside fight first with a3, Rb1 and b4, opening the b-file.
Anglo-Indian: Mikenas-Carls (3.e4 c5) – 1. c4 Nf6 2. Nc3 e6 3. e4 c5 4. e5 Ng8 5. Nf3 Nc6 …. Against 1...Nf6 and 2...e6, White plays 3.e4 to take the centre at once. After 3...c5 4.e5 Ng8 White gambits the e5 pawn for a big lead in development and control of d6.
Botvinnik System vs ...e5 and ...g6 – 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 d6 …. White builds a pawn wall on c4 and e4 with a fianchettoed bishop and the knight on e2. The d5 square becomes a fortress for White's knight, and the play continues on either wing.
Against ...c6 and ...d5 (Slav-style setup) – 1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 e6 5. b3 Nbd7 …. Black builds a Slav triangle with ...c6, ...d5 and ...e6. White develops with b3, Bb2 and Qc2, then uses the Nb5 jump and the c-file when Black breaks with ...e5.
Traps
Trapped bishop after ...Ba5 – In the Nimzo-English, Black avoids giving up the bishop with ...Ba5. White plays b4 and c5, and the bishop on b6 has nowhere to go.
Watch out: ...Nd4 and ...Nf3 mate – In the Four Knights with 4.g3, Black's ...Nd4 sets a trap. If White grabs e5 and then retreats the knight to d3, ...Nf3 is mate because the e2 pawn is pinned.
Watch out: the early ...Qf6 trick – With the bishop on c5, Black's ...Qf6 aims at f2. If White continues automatically with Bg2, ...Qxf2 is mate.
The line trainer
The line trainer for English Opening has 50 lines that grow out of 1. c4, learned a few new ones a day with spaced-repetition review.
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