Part 1: d4 knight-f6 2 c4 e5 3 de knight-g4; the knight system 4 knight-f3; the bishop system 4 bishop-f4; the alekhine system 4 e4; rare systems. Part 2: d4 knight-f6 2 c4 e5 3 de knight-e4; Fajarowicz gambit introduction; Fajarowicz 4 queen moves on the d-file; Fajarowicz 4 queen c2; Fajarowicz 4 knight-f3 and others. Part 3 1 d4 knight-f6 2 c4 e5; declining the gambit.