1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c5  5. c4d5  5... f6d5 The Semi-Tarrasch  Defense is a common guest now at top tournaments. Despite the obvious  danger of Black being checkmated on the kingside, the computer-backed  defenders often employ it, relying on the clarity of their computer  analysis. 6. e2e4  6... d5c3  7. b2c3  7... c5d4 