Endgame mistakes

Position after 42.Rxe3

It is hard to imagine that Black could lose this position, especially when Black is more than 100 points higher than White.

Atalik, Ekaterina (IM) – Chen, Zhu (GM)
Ataturk International Women
Istanbul (3), 13.03.2008

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.Nc3 e6 6.Nh4 Bg6 7.Be2 Nbd7 8.g3 Bd6 9.0–0 Qe7 10.a3 dxc4 11.Nxg6 hxg6 12.Bxc4 e5 13.Re1 0–0–0 14.b4 Rh7 15.f4 Bc7 16.Bf1 Qe6 17.Ra2 Ne4 18.Rc2 Nxc3 19.Rxc3 Kb8 20.Rd3 e4 21.d5 cxd5 22.Rxd5 Rhh8 23.Bc4 g5 24.Qe2 gxf4 25.exf4 Bb6+ 26.Be3 Rc8 27.Rc5 Qe7 28.Rxc8+ Rxc8 29.Bxb6 Nxb6 30.Bb3 Rc3 31.Qb2 Qf6 32.Re2 Qd4+ 33.Kg2 Nc4 34.Bxc4 Qxc4 35.f5 Qd3 36.Qd2 Qf3+ 37.Kg1 Rd3 38.Qf4+ Qxf4 39.gxf4 e3 40.a4 Rb3 41.Kg2 Rxb4 42.Rxe3 (diagram) f6 43.Kf3 Rxa4 44.Re8+ Kc7 45.Re7+ Kc6 46.Rxg7 b5 47.Rf7 b4 48.Rxf6+ Kd5 49.Rf8 Ra6 50.Rb8 Kc4 51.Kg4 b3 52.Kg5 Ra5?? (the losing move) 53.h4 Kc3 54.h5 b2 55.h6 Ra1 56.f6 Rg1+ 57.Kf5 Rg8 58.Rxb2 Kxb2 59.f7 Ra8 60.Kg6 a5 61.Kg7 1–0