1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. e1g1  4... d7d6  5. c2c3  5... g8f6  6. d2d3  6... a7a6  7. c4b3  7... e8g8  8. f1e1  8... c5a7  9. b1d2  9... f6g4 [%c_effect g4;square;g4;type;Interesting;persistent;true] The game becomes sharp after this knight thrust. 10. e1e2  10... g8h8  11. h2h3  11... g4h6  12. d2f1 