[Event "ch-USA 2022"] [Date "2022.10.18"] [Round "12.3"] [White "Sevian, Samuel"] [Black "Niemann, Hans"] [Result "0-1"] [WhiteElo "2684"] [BlackElo "2699"] [Annotator "King,Alex"] [Variant "From Position"] [ECO "?"] [Opening "?"] [StudyName "2022 U.S. Championships"] [ChapterName "Sevian, Samuel - Niemann, Hans"] [ChapterURL "https://lichess.org/study/dfRDZs7P/II5f8jAk"] [FEN "8/p7/5P1R/P7/7K/1p6/1k4rP/8 w - - 0 48"] [SetUp "1"] [Orientation "white"] { [#] } 48. h3? (48. Rh5! { was the only move: } 48... Rxh2+ 49. Kg5 Rxh5+ 50. Kxh5 Kc2 51. f7 b2 52. f8=Q b1=Q) 48... Ka2 49. Rh7 b2 50. Rb7 Rg6! 51. f7 Rf6! { A precise maneuver that prepares the following sacrifice. } 52. Kg5 Rxf7! 53. Rxf7 b1=Q { Unfortunately this ending offers no chance of a fortress for White, since Black's a-pawn remains a latent asset. } 54. h4 Qg1+ 55. Kh5 Kb3 56. a6 Kc4 57. Rg7 Qc5+ 58. Rg5 Qe7 59. Rf5 Kd4 60. Kg4 Qe6 61. Kg5 Ke4 62. Rf6 Qe7 63. Kg6 Ke5 64. Rf5+ Ke6 65. Rf4 Qe8+ 66. Kg5 Qg8+ 67. Kh5 Ke5 68. Rf1 Qd5 69. Rf8 Qd1+ 70. Kg5 Qd2+ 71. Kh5 Qd7 72. Rf1 Qb5 73. Rf8 Qxa6 74. Kg5 Qe6 75. Rf1 Qg8+ 76. Kh6 Qh8+ 77. Kg5 Qd8+ 78. Kh5 a5 { 0-1 Black wins. } 0-1