The Old Indian Defence: 1.d4 Nf6 2.c4... 5.e4 begins with 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4 (ECO A55). Across rating levels it shows up in 270,093 recorded games — enough data to map exactly where it succeeds and where it stalls.
History and Notable Players
It arises from the Old Indian Defence: 1.d4 Nf6 2.c4... 4.Nf3. Among the most prolific White practitioners are Ivan Farago (27 games), Wolfgang Uhlmann (26 games), Vlastimil Babula (12 games). Black-side regulars include Lutz Espig (77 games), Thomas Casper (45 games), Ekaterina Kovalevskaya (29 games).
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. At 1200 Elo, the opening shows up in 0.00% of games (3,410 samples). White scores 51.9%, Black 44.4%, draws 3.6%. At 1800 the opening surfaces in 0.01% of games; White wins 48.5%, Black 47%, draws 4.5%. At 2500, 0.09% of games go into this opening; draws sit at 10.2% — the line is well-mapped at this level. Positions also become less sharp as level rises (sharpness 0.96 → 0.90).
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is Be7, played 39.1% of the time. There are 4 other moves seeing meaningful share, and 76.2% of games stick to established theory. Entropy: 2.50. By 2500, Be7 dominates at 55.2% of replies; only 4 viable alternatives remain and 93% of moves are theory. Entropy drops to 1.72. That entropy collapse is the signature of a line where preparation pays off: at the top, players know the best move and play it.
Common Mistakes
- Drifting away from main theory — At 400 Elo, theory adherence sits at 62.7% — versus 91.4% at 2000. The most popular deviation is exd4 (played 19.7% of the time at 400, much less so up top). It looks fine but quietly hands the better-prepared side an edge.
- 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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