A new move.
1. c2c4  1... g8f6  2. g1f3  2... e7e6  3. g2g3  3... d7d5  4. f1g2  4... d5d4  5. e1g1  5... b8c6  6. d2d3  6... f8c5 [%c_effect c5;square;c5;type;Interesting;persistent;true] 7. b1d2  7... e8g8  8. d2b3  8... c5e7  9. e2e3  9... d4e3  10. c1e3  10... f6g4  11. e3c5  11... e7c5  12. b3c5  12... b7b6 This position has been discussed in four important recent games that I will mention in the comments.