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 