[Event "2022 Women's Olympiad"] [Site "https://lichess.org/study/cS8lSqW7/PXL49CSP"] [Date "2022.08.01"] [Round "4"] [White "Yip, Carissa"] [Black "Zhang, Jilin"] [Result "1-0"] [WhiteElo "2416"] [BlackElo "2212"] [Annotator "King,Alex"] [Variant "From Position"] [ECO "?"] [Opening "?"] [FEN "3r4/7p/p7/4Pk2/4R3/4K3/PP6/8 b - - 0 44"] [SetUp "1"] [Source "https://lichess.org/study/cS8lSqW7/PXL49CSP"] [Orientation "white"] 44... Re8? $18 (44... h5!? { would still hold a draw for Black, despite White's extra pawn: } 45. e6 Re8 46. e7 Kf6 47. Kf4 Rxe7!? 48. Rxe7 Kxe7 { Even in this pure pawn ending, White cannot win. } 49. Kg5 Ke6 50. Kxh5 Ke5 51. Kg5 Kd4 52. Kf5 Kd3 53. Ke5 Kc2 54. b4 Kc3! 55. a3 Kb3 56. Kd5 Kxa3 57. Kc5 Kb3) 45. Rf4+! Kg5 (45... Kxe5 { runs into } 46. Re4+ $18) 46. Ke4 { Now White's advantage in king placement will allow her to advance her e-pawn. } 46... h5 47. Rf1 h4 48. Rg1+ Kh5 49. Kd5 Rd8+ 50. Kc6 Rd2 51. e6? $13 { Spoiling the win. } (51. Re1! { was the correct way to advance the e-pawn. } 51... Rc2+ 52. Kd5 Rd2+ 53. Kc4 Rc2+ 54. Kd4 Rd2+ 55. Kc3 Rd8 56. e6 Kg5 57. e7 Re8 58. Kb4 Kf6 59. Re4! { White must eliminate Black's dangerous passer. } 59... Rxe7 60. Rxh4 { If Black's king were already on the queenside defending the a-pawn then the position would be a fairly simple draw, but here it is too far afield and White has time to collect a second extra pawn. } 60... Rb7+ 61. Ka3 Ke5 62. Rh6 a5 63. Ra6 Rb5 64. b3 Kd5 65. Ka4 $18) 51... Rc2+ 52. Kd7 Rd2+ 53. Kc7 Rc2+ 54. Kd6 Rd2+ 55. Ke5 Re2+ 56. Kf6 Rf2+ 57. Kg7 Re2 58. Kf7 Rf2+ 59. Ke8 Rxb2 60. Ra1 h3 61. e7 h2 62. Rf1 Rxa2? $18 { Spoiling the draw in return. } (62... Kg4!? { leads to a study-like draw: } 63. Kf7 Rf2+! 64. Rxf2 h1=Q 65. e8=Q Qh5+ 66. Ke7 Qe5+ 67. Kd8 Qb8+ { White is up a full rook, but cannot avoid a "perpetual skewer". } 68. Kd7 Qb5+ 69. Ke7 Qe5+ 70. Kf7 Qh5+ 71. Kf8 Qh8+ 72. Ke7 Qe5+) 63. Kf7! Re2 (63... Rf2+ { no longer works, since after } 64. Rxf2 h1=Q 65. e8=Q Qd5+ { White has the counter-check } 66. Kf6+ $18) 64. Rh1! Kg4 65. Rxh2! { Now Black has nothing better than simplifying to a queen vs rook endgame. } 65... Rxh2 66. e8=Q Rf2+ 67. Kg6 Rf4 68. Qc8+ Kf3 69. Qxa6 { This ending has baffled some strong players in the past, but Yip's technique proves up to the challenge. } 69... Kg4 70. Qe6+ Kf3 71. Kg5 Re4 72. Qh3+ Ke2 73. Kf5 Re3 74. Qg2+ Kd3 75. Kf4 Re2 76. Qd5+ Kc3 77. Kf3 Rd2 78. Qe5+ Kc4 79. Ke3 Rd5 80. Qb2 Kc5 81. Ke4 Rd7 82. Qa3+ Kc6 83. Ke5 Kb5 84. Qc3 Kb6 85. Qb4+ Kc6 86. Ke6 Rc7 87. Qa4+ Kc5 88. Qa5+ Kc6 89. Qd5+ Kb6 90. Kd6 Rb7 91. Qc6+ Ka7 92. Kc5 Rb8 93. Qc7+ Ka8 94. Qa5+ Kb7 95. Kd6 Rc8 96. Kd7 Rb8 97. Qe5 Ka7 98. Kc7 Rb7+ 99. Kc6 Rb6+ 100. Kc5 Rb7 101. Qa1+ Kb8 102. Qa5 Rc7+ { 1-0 White wins. } (103. Kb6 Rb7+ 104. Kc6 $18 { reaches the so-called "Philidor position", where Black is in zugzwang. (Note that this is different than the more famous "Philidor position" in rook+pawn vs rook. Philidor was a prolific theorist!) } 104... Rb1 105. Qe5+ Ka7 106. Qd4+ Kb8 107. Qh8+ Ka7 108. Qh7+ $18) 1-0