Modern Benoni

The Modern Benoni (ECO code A70) is a chess opening that begins with 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6. A dynamic pawn structure where Black has queenside counterplay with ...b5 and kingside chances with ...f5. White has more space but Black's pieces are active. Tal was a famous advocate.

The main line of the Modern Benoni is 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6. It is classified under ECO code A70 and falls in the Indian Defense family of chess openings. From this starting position, both sides have well-established plans — White typically continues with natural developing moves while Black follows the response patterns described above.

The Modern Benoni is more strategic than tactical, which can make it harder for beginners to feel like they're "doing something" — but the upside is fewer forced lines to memorize. If you understand the typical pawn structure and middlegame plans, you can play this opening from move 1 without needing 15 moves of theory. Pair it with engine review at chess.rodeo to see where your understanding breaks down.

The Modern Benoni is classified as ECO code A70. ECO (Encyclopaedia of Chess Openings) is the standard five-letter classification system developed by Chess Informant in the 1970s — A-codes cover flank openings, B-codes 1.e4 replies that aren't 1...e5, C-codes 1.e4 e5 openings, D-codes 1.d4 d5 systems, and E-codes Indian Defenses. You can browse all openings by ECO code in our free opening database.

Use chess.rodeo for full Stockfish analysis of your Modern Benoni games — no account required, no daily cap, no paywall. Paste your PGN and get instant engine evaluation on every move, including the opening phase. For move-by-move replay without engine output, use our free PGN viewer. Both are completely free with no signup.