1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... d7d5  4. c4d5  4... f6d5 So needed to hold in this game  in order to wrap up the match, and his choice is the very well analyzed  Improved Tarrasch Defense. 5. e2e4  5... d5c3 