Pia is a very experienced player. She got a small but persistent advantage and took it into a long endgame. We can enjoy her endgame technique; to me it is better than reading a book. Watch and learn!
[Event "WWCC2015"][Site "Sochi"][Date "2015.03.29"][Round "28.2"][White "Cramling, Pia (SWE)"][Black "Pogonina, Natalija (RUS)"][Result "1-0"][SetUp "1"][FEN "8/1pk2p2/3r3p/PR1p2pP/3P2P1/3KP3/8/8 w - - 0 55"][ECO "D56"]55. e4 dxe4+ 56. Kxe4 Rf6 57. Rf5 Re6+ 58. Kd5 Rd6+ 59. Kc4 f6 60. Rb5 Re6 61. Kd5 Re3 62. Rb6 Rf3 63. Ke6 Rf4 64. d5 Re4+ 65. Kxf6 Rxg4 66. d6+ Kc8 67. Kg6 Rg1 68. Kxh6 g4 69. Kg7 g3 70. h6 Rh1 71. Rb2 Rh4 72. h7 Rg4+ 73. Kf6 Rh4 74. Kg6 Kd7 75. Rxb7+ Kxd6 76. Rb1 Ke5 77. a6 g2 78. Rg1 Rg4+ 79. Kh5