According to chessbase.com past article :-
Sarah Chiang from Texas is World Youth 2007 (Under 10) silver medalist . It is the first medal for a USA girl in history! Sarah is also fierce off the board – she has a black belt in karate!
WCM Chiang Sarah - Nur Nabila Azman Hisham [A40]
World Youth (Under 12 Girls) Round 10, 21.11.2009
1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Nf3 Nbd7 5.Bg5 Be7 6.e3 0–0 7.Bd3 b6 8.cxd5 exd5 9.0–0 Bb7 10.Rc1 c5 11.dxc5 bxc5 12.Na4 Theory recommend 12.Qe2 12...Rc8 13.Bf5
13...Rc7?! correct is 13...Ne4 . Now black will be attack by white's bishops 14.Bf4 Rc8 15.Ne5 c4 16.Nc3 g6 17.Bh3 17...Nxe5? Black can still save the rook with 17...Rc5 and white advantage is minimum 18.Bxc8 Nf3+ 19.Qxf3 Qxc8 20.Qe2 White obviously ahead in material 20...Rd8 21.Rfd1 Qc6 22.f3 Nh5 23.Be5 Ng7 24.Rd2 White missed the strong move 24.e4! dxe4 25.Rxd8+ Bxd8 26.Nxe4 24...Ne6 25.Rcd1 Qc5 26.Kf2 f5 27.f4 Kf7 28.Kf1 better is 28.g4! opening lines towards black's king 28...Nf8 29.Qf3 Ba8? 29...Nd7 is better 30.Nxd5 Qb5 31.Kg1 Bc5 32.Kh1 White's wisely release her king from being pinned 32...h5 33.e4 fxe4 34.Qxe4 Re8 35.Qc2 Bxd5 black is losing 36.Rxd5 Re6?! 37.h3 Re8 38.Bd6 Nd7 39.f5 g5 40.Qd2 Qc6 41.Bxc5 Nxc5 42.Rd6 Qe4 43.Qxg5 1-0 It's mate in 9 (maximum) according to Fritz
Sarah Chiang photo from chessbase.com