Old Indian Defense: Janowski Variation

An entry in the Encyclopedia of Chess Openings (ECO A53), reached after 6 half-moves: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5.

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4.e4 1 line
- A53 Grinberg Gambit
4.f3 1 line
- A53 Main Line
4.g3 1 line
- A53 Fianchetto Variation

About this opening

Old Indian Defense: Janowski Variation is an opening in the Encyclopedia of Chess Openings, classified under code A53. ECO group A (A00–A99) covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached after 6 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5.

It belongs to the Old Indian Defense family. Within that family this is a sub-variation (the Janowski Variation line).

The opening sequence in prose form: 1.d4 Nf6, 2.c4 d6, 3.Nc3 Bf5. From this position 3 named continuations are recorded in the encyclopaedia, each leading to a distinct theoretical line.