1. Main line 1. e4 d6 2. d4 Nd7 Choose a line 1. Main line 1. e4 d6 2. d4 Nd7 2. Rat Defense: Fuller Gambit 1. e4 d6 2. f4 d5 3. exd5 Nf6 3. Rat Defense: Harmonist 1. e4 d6 2. f4 4. Rat Defense: Petruccioli Attack 1. e4 d6 2. h4 5. Rat Defense: Spike Attack 1. e4 d6 2. g4 Close 1. Main line 1. e4 d6 2. d4 Nd7 2. Rat Defense: Fuller Gambit 1. e4 d6 2. f4 d5 3. exd5 Nf6 3. Rat Defense: Harmonist 1. e4 d6 2. f4 4. Rat Defense: Petruccioli Attack 1. e4 d6 2. h4 5. Rat Defense: Spike Attack 1. e4 d6 2. g4 Next