Ten year old chess player Hikaru Nakamura has shattered the record for the youngest American to defeat an International Master. He defeated IM Jay Bonin in the following game in a weekend tournament at the Marshall Chess Club:

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7 6.Be2 Bb5 7.c4 Bxc4 8.Bxc4 dxc4 9.d5 exd5 10.Qxd5 Ne7 11.Qxc4 Qa6 12.Na3 Qxc4 13.Nxc4 Nf5 14.a4 Nc6 15.0-0 h6 16.Be3 0-0-0 17.Rad1 Be7 18.g4 Nfd4 19.Bxd4 cxd4 20.Nfd2 h5 21.gxh5 Rxh5 22.f4 f6 23.Nf3 g5 24.exf6 Bxf6 25.fxg5 Bxg5 26.Nxg5 Rxg5+ 27.Kh1 d3 28.b3 Ne5 29.Nb2 Rg4 30.Rfe1 Rd5 31.Re3 d2 32.Re2 Nf3 33.Rf2 Rf4 34.Nc4 Rd3 35.Nxd2 Rfd4 36.Rc1+ 1-0

For more about Hikaru, see this interview from February 1997.