Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation is a chess opening with the ECO code B09, part of the Pirc Defense family. It goes 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5 Nfd7 7. h4. White opens with 1. e4 (the king's pawn) and Black answers 1... d6. After 13 moves it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. e4 – White plays the pawn to e4
1... d6 – Black plays the pawn to d6
2. d4 – White plays the pawn to d4
2... Nf6 – Black plays the knight to f6
3. Nc3 – White plays the knight to c3
3... g6 – Black plays the pawn to g6
4. f4 – White plays the pawn to f4
4... Bg7 – Black plays the bishop to g7
5. Nf3 – White plays the knight to f3
5... O-O – Black castles kingside
6. e5 – White plays the pawn to e5
6... Nfd7 – Black plays the knight to d7
The line goes on for 1 more moves; the lesson shows them all.
About the Pirc Defense
Black answers 1.e4 with 1...d6, then ...Nf6, ...g6 and ...Bg7. Black lets White build a centre and counterattacks it later.
Black breaks with ...e5 or ...c5 after castling.
White's sharpest try is the Austrian Attack with f4 and e5.
Another plan is Be3, Qd2 and Bh6 to trade Black's strong bishop.
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