Starting from 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 0-0 9.0-0 Nbd7 10.Nd2 a6, players enter the Modern Benoni: 1.d4 Nf6 2.c4... a6 — ECO A64. Across rating levels it shows up in 973 recorded games — enough data to map exactly where it succeeds and where it stalls.
History and Notable Players
It arises from the Modern Benoni: 1.d4 Nf6 2.c4... Nbd7. Among the most prolific White practitioners are Zlatko Ilincic (21 games), Keith C Arkell (16 games), Victor Mikhalevski (11 games). Black-side regulars include Pavel Simacek (11 games), Mikhail Tal (8 games), Miso Cebalo (8 games).
Move Diversity and Theory Depth
Move choice is far from uniform in the Modern Benoni: 1.d4 Nf6 2.c4... a6. At 1200 Elo, the top reply is —, played 0% of the time. There are 0 other moves seeing meaningful share, and 0% of games stick to established theory. Entropy: 0.00. By 2500, a4 dominates at 93.8% of replies; only 1 viable alternatives remain and 97.9% of moves are theory. Entropy drops to 0.44. Move diversity stays high even at master level, suggesting the opening doesn't force one specific response.
Common Mistakes
- Playing outside main lines — At 400 Elo, only 0% of moves follow established theory — at 2000 that climbs to 98.1%. Most of the gap is players who pick a reasonable-looking move over the best one, and the position quietly drifts.
- Neglecting development — It can feel productive to make extra pawn moves early, but falling behind in piece development is what loses most amateur games — especially in open positions where active pieces find squares fast.
- 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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