King's Gambit Accepted - Kieseritsky - Berlin defence - Riviere variation
1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5
White pushes the king's pawn to e4. Black moves the king's pawn to e5. White pushes the f-pawn to f4.
Black captures on f4 with the king's pawn. White develops the knight to f3. Black moves the g-pawn to g5.
White moves the h-pawn to h4. Black pushes the g-pawn to g4. White transfers the knight to e5.
Black develops the knight to f6. White captures with the knight on g4. Black plays the queen's pawn to d5.