Benoni Defense
Blog post description.
OPENING
5/3/20262 min read
2. Basic Concepts in the Benko Gambit
The fundamental strategy of the Benko Gambit in a nutshell:
Sacrifice the b-pawn to open the a- and b-file on the queenside
Develop the dark-squared bishop to g7
Finish the Development and put the rooks on b8 and a8
If White accepts the gambit and Black acts along the above guidelines, we end up in a position like the following one.
A typical position in the Benko Gambit
Black exerts strong pressure via the a- and b-file and the long diagonal. It will not be easy for White to make his extra pawn count. Contrary to other gambits, exchanges might well be in Black’s favour! For example, getting the queens off the board, often improves Black’s chances. The white queen defends important squares and is a major asset for a possible counterattack in the center (e4-e5) on the kingside (h4-h5). Black’s queenside pressure persists even without queens.
White’s pawn structure may slightly differ from the diagram above (for example, the e-pawn could also be on e2), while Black’s basic structure is exactly as shown. This “Benko Pawn Chain” is the backbone of this opening’s strategy. With such a secure structure, his pieces can roam freely and attack weak points in the opponent’s position. If one of White’s pawns drops, the advantage often changes to Black’s side: If the a- or b-pawn is lost, White is left with a backward pawn. If the e-pawn gets captured, the d5 will be isolated.
The Benko Pawn Chain
In the main lines of the Benko, the pawn structure looks as follows:
he Knight Manoeuvre ...Ng4-e5
In the diagram above, we see the knight manoeuvre carried out under optimal circumstances. Black threatens to invade on d3 with ...Ne5-d3, which usually provides him with excellent counterplay. If White defends with Bf1, then Black can exchange bishops and fix the outpost on d3 with ...c5-c4.
Transferring the knight to e5 via g4 generally works well with a white pawn on e4 and with the light-squared bishops either off the board or the white one being on g2.
Playing ...c5-c4
Creating an outpost on d3 for the knight can be one idea behind playing ...c5-c4. Another motif is to break up White’s queenside pawns.
Here ...c5-c4 is played to weaken White’s structure. Black’s c-pawn gets exchanged against White’s b-pawn which leaves the a4-pawn isolated. Also, by opening the c-file, the c3-knight comes under pressure – so White’s entire construction on the queenside becomes less stable.
Since playing ...c5-c4 gives up the control over the d4-square, Black has to check beforehand if Nd4-c6 is possible (which in general cannot be allowed) or, if White can keep his formation intact by playing b3-b4.