The first of two videos on systems with 1...d6, this one based on the flexible Czech System (1.e4 d6 2.d4 Nf6 3.Nc3 c6). The Czech System introduces a fascinating area of opening play, where with well-timed counter-measures Black aims to destabilize the whole White set-up. The Czech is much less susceptible to direct attack than a regular Pirc Defense. Part 1: Pseudo-Austrian 4.f4 Part 2: Aggressive Lines 4.Be3/4.Bg5/4.f3 Part 3: Classical 4.Nf3 Part 4: Quiet Systems 4.g3/4.a4