[Event "US Open"] [Site "Boston (MA)"] [Round "12.114"] [White "Buckendorf Glen (ID)"] [Black "Mannella James (NY)"] [Result "1-0"] [ECO "B01"] [Opening "Scandinavian: Marshall, 4.c4"] 1. e4 {Annotations by Buckendorf.} d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb6 5. Nf3 Bg4 6. c5 N6d7 7. Qb3 Qc8 {? The source of Black's problems. The Q is no better developed than on d8 and is assigned a defensive obligation at b7. The Q will be needed on the Kingside but can't return in time.} 8. Bc4 e6 9. h3 Bf5 {Black should play B:f3.White now gains space and development at Black's expense.} 10. g4 Be4 11. Nbd2 {By attacking the B and guarding the N, White is winning the battle of the opening tempo.} Bxf3 12. Nxf3 Be7 13. Bg5 {! This delays, then prevents, castling.} Bxg5 14. Nxg5 Nc6 15. Bxe6 {! The position demands this sacrifice. Black can't accept, or 15 ...f:e6 16 Q:e6+ leads to mate.} Nxd4 (15... fxe6 16. Qxe6+ Kf8 (16... Kd8 17. Nf7#) 17. Qf7#) 16. Bxf7+ Kf8 17. Ne6+ Nxe6 18. Bxe6 Qe8 19. O-O-O Nf6 20. g5 Ng8 21. Qf3+ Nf6 22. Rhe1 Qh5 23. Qf5 1-0