Here, 29. ... Ba3+!! and promoting to knight could've save the game!

    [Date "2012.05.12"]
    [Result "1-0"]
    [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
    [White "Ni Hua"]
    [WhiteElo "2673"]
    [Black "Le Quang Liem"]
    [BlackElo "2703"]
    [Event "Asian Continental Open Championship"]
    [Site "Ho Chi Minh City"]
    [Round "8"]
    [ECO "B84"]

    1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.Be2 Qc7 8.g4 b5 9.g5 Nfd7 10.a3 Bb7 11.Qd2 Nc6 12.Nxc6 Bxc6 13.f4 Nc5 14.Bf3 Qb7 15.Qd4 e5 16.fxe5 Ne6 17.Qd2 dxe5 18.Nd5 Bd6 19.O-O-O O-O 20.h4 a5 21.h5 b4 22.h6 bxa3 23.b3 Rfc8 24.Nb6 Bb4 25.Qh2 Bxe4 26.hxg7 a2 27.Kb2 a4 28.c4 axb3 29.g6 Ba3+!! 30.Kxb3 a1=N+!! 31.Rxa1 ( 31.Kc3 Rxc4+!! ( 31...Bb4+! 32.Kxb4 Ra4+!! 33.Kc3 ( 33.Kxa4 Nc5+ 34.Bxc5 Qc6+ 35.Ka3 Qxc5+ 36.Ka2 Qa5+ 37.Kb2 Qxb6+ 38.Kxa1 Qa5+ 39.Qa2 Qc3+ 40.Qb2 Ra8# ) 33...Rcxc4+!! 34.Kd2 ( 34.Nxc4 Qb4# ) 34...Ra2+ 35.Ke1 Rxh2 ) 32.Kd2 ( 32.Nxc4 Qb4# ) ( 32.Kxc4 Qc6+ 33.Bc5 Qxc5# ) 32...Rc2+ 33.Ke1 Rxh2 ) 31...Qxb6+!! 32.Bxb6 Nd4+!! 33.Kc3 ( 33.Bxd4 Rcb8+ 34.Kc3 ( 34.Ka2 Bc5# ) 34...Bb4+ 35.Kb2 Bd2+ 36.Bb6 Rxb6# ) 33...Rxc4+!! 34.Kxc4 ( 34.Kd2 Nxf3+ 35.Kd1 Nxh2 36.Rxh2 fxg6 ) 34...Rc8+ 35.Bc5 Rxc5# 
    1-0