The Pirc Defense: Byrne Variation is a chess opening classified under ECO code B07 in the Semi-Open Games family, where Black responds to 1.e4 with something other than 1...e5, including the Sicilian Defense, Caro-Kann, and Pirc. It is reached after 4 moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5. The resulting position leaves black to move.
Resulting Position
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5
rnbqkb1r/ppp1pp1p/3p1np1/6B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq - 1 4Resulting Position