Modern Benoni - Classical Main Line
White develops with Nf3 and Be2, defends e4 with Nd2 and f3 and stops ...b5 with a4. Black brings the knight to c7, reinforces c5 with ...b6 and prepares to exchange light-squared bishops with ...Ba6.
1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 11.f3 Nc7 12.a4 b6
Move by move
- 1.d4 – White occupies the centre with the queen's pawn and frees the c1 bishop. Against 1.d4 this course offers two systems based on ...c5: the Benko and the Benoni.
- 1...Nf6 – A flexible move: it controls e4, stops 2.e4 and does not yet reveal the structure. It is better to wait for 2.c4 before ...c5, so that White cannot answer with a comfortable e2-e4.
- 2.c4 – White gains space and controls d5. However, the c4 pawn will support a future pawn on d5: it is exactly the target the Benko will hit with ...b5.
- 2...c5 – Black hits d4 at once. After 3.Nf3 cxd4 the structures become symmetrical; the main reply is 3.d5, which gains space but creates the c4-d5 chain that Black will undermine.
- 3.d5 – White advances, gaining space and taking c6 away from the b8 knight. Now the d5 pawn depends on c4: Black can choose between ...b5 (Benko) and ...e6 (Benoni).
- 3...e6 – The Modern Benoni: Black challenges d5 to exchange the e-pawn and create an asymmetrical structure, with a queenside majority and a half-open e-file.
- 4.Nc3 – White supports d5 with the knight, so he can recapture with the c-pawn after ...exd5 and keep a pawn on d5.
- 4...exd5 – Black exchanges in the centre: he opens the e-file and fixes the typical Benoni structure.
- 5.cxd5 – White recaptures with the c-pawn: he gets a central majority and space, while Black has the queenside majority.
- 5...d6 – The d6 pawn blocks d5, controls e5 against the e4-e5 push and opens the way for the c8 bishop. It is the key pawn of Black's defence.
- 6.e4 – White completes the e4-d5 centre. His long-term plan is the e4-e5 break, which would open the position in his favour.
- 6...g6 – Black prepares the fianchetto: the g7 bishop will control e5 and the long diagonal, supporting future queenside expansion.
- 7.Nf3 – Classical development supporting e5. White chooses the most natural line, with neither f4 nor a fianchetto.
- 7...Bg7 – The bishop completes the fianchetto: it protects the king, controls e5 and looks towards c3 and b2.
- 8.Be2 – The Classical Variation: the e2 bishop is modest but solid, protects the king and leaves the Nd2-c4 manoeuvre against d6 available.
- 8...O-O – Black castles and prepares ...Re8 to pressure e4 along the e-file.
- 9.O-O – White castles. Now he must decide how to defend e4 from the pressure of ...Re8: with Nd2, Qc2 or f3.
- 9...Re8 – The rook attacks e4 on the half-open file: it forces White to defend the pawn and restrains the e4-e5 break.
- 10.Nd2 – The knight defends e4 and prepares to go to c4, from where it will attack d6. It also frees the f-pawn for f3 or f4.
- 10...Na6 – The knight goes to a6 to reach c7 (supporting ...b5) or b4. On d7 it would have obstructed the c8 bishop.
- 11.f3 – White locks e4 with the pawn: now the d2 knight is free to go to c4 and ...Ng4 is no longer possible. In return the g1-a7 diagonal is slightly weakened.
- 11...Nc7 – The knight reaches c7: it supports the ...b5 push, controls d5 and e6, and frees a6 for the rook or bishop.
- 12.a4 – White stops ...b5 at once: without this push Black's queenside majority stays blocked. In return, b4 becomes an outpost for Black's pieces.
- 12...b6 – Black reinforces c5 and prepares ...Ba6 to exchange the e2 bishop, which defends the light squares c4 and b5. Later he can return to the idea ...a6, ...Rb8 and ...b5.
How to exploit the position
A blocked Benoni structure: White has more space and prepares Nc4 and e4-e5, Black has the g7 bishop, the e-file and the e5 square for his pieces.
- ...Ba6 exchanges the e2 bishop or a knight on c4: White loses control of b5 and c4 and the pressure on d6 decreases.
- The f6 knight can go to d7 and then e5, a stable square from which it controls c4, d3 and f3.
- Later ...a6, ...Rb8 and ...b5 set the majority in motion despite a4; alternatively the ...f5 break once the f6 knight has moved.
Master tips
The d6 pawn is the heart of the defence
In the Benoni White tries to attack d6 with Nc4 and Bf4 and to break with e4-e5. As long as d6 is solid, Black has good play.