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Old Indian Defense: Czech Variation, with Nf3 is a chess opening that arises after 1.d4 Nf6 2.c4 d6 3.Nf3 c6. It is classified A53 in the ECO system, and the position after these moves has white to move.
This line is a variation within the Old Indian Defense family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.d4 Nf6 2.c4 d6 3.Nf3 c6.