1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8 10.Nd2 opens the Modern Benoni: 1.d4 Nf6 2.c4... 10.Nd2, ECO A77. With 49,596 games on record, the patterns below come from the largest practical sample available.
History and Notable Players
It arises from the Modern Benoni: 1.d4 Nf6 2.c4... Re8. On the White side, Svetozar Gligoric (19 games), Jan Hein Donner (18 games), Ivan Farago (11 games) top the database. Notable Black exponents: Dragoljub Velimirovic (14 games), Milan Matulovic (12 games), Pavel Simacek (11 games).
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. The 1200 bracket has 36 games (0.00% of all games at that level); White wins 58.3%, Black 41.7%, 0% are drawn. By 1800, popularity is 0.00% and White's score is 52.8% to Black's 43.5%. At 2500, 0.02% of games go into this opening; draws sit at 7.3% — the line is well-mapped at this level. White's edge erodes by 11.3pp from 1200 to 2500 Elo, suggesting Black's counterplay is easier to find with experience.
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is a6, played 33.3% of the time. There are 6 other moves seeing meaningful share, and 72.2% of games stick to established theory. Entropy: 2.62. By 2500, Nbd7 dominates at 32.4% of replies; only 4 viable alternatives remain and 93.5% of moves are theory. Entropy drops to 1.92. The narrowing is significant — strong players consolidate around a small set of best moves, while amateurs scatter across many plausible-looking options.
Main Lines and Variations
After 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Re8 10.Nd2, the established follow-ups are:
Each branch leads to a different middlegame character — the resulting pawn structure decides what kind of game you get.
Common Mistakes
- Neglecting development — Extra pawn moves in the opening are tempting, especially when you "know the moves". Developing a piece each turn is the simple correction.
- Letting White own the centre — Hypermodern openings concede central space on purpose, but only if you strike back in time. Delay the counter-blow and you end up squeezed.
Practice on Chessiverse
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