[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "White to move"] [Black "?"] [Result "*"] [Annotator "peter"] [SetUp "1"] [FEN "rnb2rk1/p3q1pp/5n2/4p1N1/3pP3/6P1/P4PBP/R1BQR1K1 w - - 0 17"] [PlyCount "12"] [EventDate "2009.10.11"] [SourceTitle "playchess.com"] {} 17. Qb3+ {strongest. The idea is to protect a3} Kh8 (17... Rf7 18. Ba3 Qb7 19. Qxf7+ Qxf7 20. Nxf7 Kxf7 {white has won an exchange}) 18. Ba3 {A skewer } Qe8 19. Bxf8 h6 (19... Qxf8 {allows a very pretty finish} 20. Nf7+ Kg8 21. Nxe5+ {Discovered check from the white queen. White clears the e5 square so he can advance the pawn} Kh8 22. Nf7+ Kg8 23. Nd6+ {now he has got the knight out of the way} Kh8 24. e5 {the knight is attacked and there is a discovered attack on the rook on a8} Ng4 25. Nf7+ {white blocks the f-file} (25. Bxa8 { is careless and lets black win!} Qxf2+ 26. Kh1 Qxh2#) 25... Kg8 26. Bxa8 { and white has won even more material}) 20. Qf7 Qxf7 21. Nxf7+ Kg8 22. Nxe5 Kxf8 $18 *