a complete repertoire for Black
The asymmetrical answer to 1.e4, playing for a win with Black. The core is the Najdorf (2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6), and every Anti-Sicilian gets a short answering scheme you don't have to learn in depth.