Chess Opening Theory/1. e4/1...c5/2. Nc3/2...d6

= Closed Sicilian =

2...d6
This move is a perfectly reasonable move, often favored by Najdorf players to avoid some move-order tricks like 2...Nc6 3.Nf3 when White firmly avoids the Najdorf, but has the downside that ...d5 would cost a tempo since Black has already played ...d6.

Estimated next move popularity: Nf3 32%, f4 29%, g3 17%, Nge2 16%, Bb5+ 2%, d4 2%, Bc4 1%, d3 1%, other moves less than 0.5%.

Theory table
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1.e4 c5 2.Nc3 d6