Chess Opening Theory/1. d4/1...d6/2. c4/2...e5/3. dxe5

Rat Defence
a b c d e f g h
8 a8 b8 c8 d8 e8 f8 g8 h8 8
7 a7 b7 c7 d7 e7 f7 g7 h7 7
6 a6 b6 c6 d6 e6 f6 g6 h6 6
5 a5 b5 c5 d5 e5 f5 g5 h5 5
4 a4 b4 c4 d4 e4 f4 g4 h4 4
3 a3 b3 c3 d3 e3 f3 g3 h3 3
2 a2 b2 c2 d2 e2 f2 g2 h2 2
1 a1 b1 c1 d1 e1 f1 g1 h1 1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)
Moves: 1. d4 d6 2. c4 e5 3. dxe5

Rat Defence


At this point, black has 2 main options. 3...dxe5 is surprisingly popular, but black is slightly worse according to the engine. Better is 3...Nc6, the Lisbon Gambit, developing aggressively and attacking the e5 pawn.