Trompowsky Attack: Edge Variation, Hergert Gambit is a chess opening with the ECO code A45, part of the Trompowsky Attack family. It goes 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4. White opens with 1. d4 (the queen's pawn) and Black answers 1... Nf6. 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. d4 – White plays the pawn to d4
1... Nf6 – Black plays the knight to f6
2. Bg5 – White plays the bishop to g5
2... Ne4 – Black plays the knight to e4
3. Bh4 – White plays the bishop to h4
3... c6 – Black plays the pawn to c6
4. Nd2 – White plays the knight to d2
4... Qa5 – Black plays the queen to a5
5. c3 – White plays the pawn to c3
5... Nxd2 – Black takes on d2 with the knight
6. Qxd2 – White takes on d2 with the queen
6... d5 – Black plays the pawn to d5
The line goes on for 1 more moves; the lesson shows them all.
About the Trompowsky Attack
After 1.d4 Nf6, White plays 2.Bg5 at once, threatening to take on f6 and damage Black's pawns. It avoids a lot of opening theory.
Bxf6 gives Black doubled pawns but gives up the bishop pair.
Black often replies 2...Ne4, attacking the bishop, or 2...e6.
...c5 and ...Qb6 hitting b2 is a common counterattack.
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