context: 1. e2e4  1... c7c6  2. d2d4  2... d7d5  3. e4e5  3... c8f5  4. c2c4 One of White's many interesting lines in the Advance Variation of the Caro-Kann. 4... e7e6  5. b1c3  5... f8b4 A good option, but not forced. 6. g1e2 A rare move. Van Foreest is a known opening specialist, and he is usually the first to show a new idea. 6... g8e7  7. a2a3 This is the idea, now the knight can capture the bishop on c3. 7... b4a5 The most natural reaction, although it's hard to say if it's better than capturing the knight. 8. b2b4  8... a5c7  9. e2g3 A new and natural move. 9... f5g6 This mistake immediately lands Black in trouble. 10. h2h4  10... h7h6  11. h4h5  11... g6h7  12. d1g4 Attacking g7. 12... h8g8 More or less forced. Now the king is in danger in the middle of the board. 13. f1e2  13... d5c4  14. e2c4  14... b8d7  15. e1g1  15... e7f5 