The Benoni Defense is an active defense for Black to fight for a win. It starts with the moves:
1.d4 Nf6 2. c4 c5 3.d5
It consists of various variations. See below
|1.d4 Nf6 2.c4 c5 3. d5 b5|
Benko Gambit (or Volga Gambit)
Very popular opening. Black sacrifices a pawn with 3...b5 to generate active piece play at the queenside.
Main Line is 4. cxb5 a6 5. bxa6 Bxa6 and after this Black fianchettoes his f8-bishop playing it to g7. (g6,Bg7)
|1.d4 Nf6 2.c4 e6 3. Nc3 c5 4.d5 exd 5.cxd d6|
Black tries to unbalance the position and gain active piece play. But this is risky.
In my opinion Black should not play e6 and exd before castling because he runs into the dangerous Taimanov Variation (or "Flick-Knife Attack") 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8 Bb5+! Nfd7. This bishop check is only possible because Black opened the diagonal f1-b5 playing e6 and exd too early.
|1.d4 Nf6 2.c4 c5 3. d5 e5|
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