[%c_effect c4;square;c4;type;Interesting;persistent;true] This same variation was played in the second game of the match.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... f8e7  5. c1g5  5... h7h6  6. g5h4 