[Event "Hannover"] [Site "Hannover"] [Round "0"] [White "Nimzowitsch"] [Black "Antze"] [Result "1-0"] [FEN "8/p1q5/5k1p/3Q1p2/5P2/1P2P2K/P7/8 w - - 0 44"] {In this ending the pivot for White's alternating maneuvers will be d4, and to a smaller extent e5 and f6 as well. White's broad strategy will be to create a passed pawn on the Queenside. Another important idea is to invade with the White King via h5. Black's counterplay lies in harrying the White King with checks, and in his passed h-pawn} 44. Qd4+ Kg6 45. Qd2 Kf6 46. Qb2+ Kg6 47. b4 Qc4 48. Qd2 Kh5 (48... Qf1+ 49. Qg2+ {Forces Queens off with a simple win for White. This tactic constantly arises in this type of ending and thus must be constantly watched for}) 49. a4 a6 50. Kg3 Qg8+ 51. Kh2 Qc4 52. Qb2 Qd3 53. Qg2 Qc4 (53... Qxe3 54. Qh3+ $18) 54. Kg3 Qg8+ (54... Qxb4 55. Qe2+ Kg6 56. Qxa6+) 55. Kh3 Qc4 56. Qf3+ Kg6 57. Kh4 $1 Kg7 (57... Qxb4 58. Qc6+ Kg7 59. Kh5 $18) 58. Qb7+ Kg6 59. Qb6+ Kh7 60. Qf6 $1 {An important step towards the win; Black now has to protect not only his a-pawn but also the f-pawn} 60... Qd5 61. Kg3 ( 61. -- Qh1+ {perpetual check}) 61... Qg8+ 62. Kh2 Qa2+ 63. Kh3 Qd5 64. Qe7+ ( 64. Qxa6 Qf3+ 65. Kh2 Qf2+ 66. Kh1 Qf3+ $11) 64... Kg6 65. Qe8+ $1 Kh7 (65... Kf6 66. Kg3 Qd3 67. a5 Qf1 68. Qe5+ Kg6 69. Qe6+ Kg7 70. Qxf5 Qg1+ 71. Kf3 Qf1+ 72. Ke4 Qc4+ 73. Ke5 Qb5+ 74. Ke6 $16) 66. Kg3 Qb3 67. a5 $1 Qb1 { This allows White to win the a-pawn after which the game is as good as over} ( 67... Qd3 $1 68. Qf7+ Kh8 69. Qf6+ Kh7 70. Qd4 $1 {The pivot} 70... Qf1 (70... Qb1 71. Qd7+ Kg6 72. Qc6+ Kg7 73. Qb7+ Kf8 74. Qxa6) 71. Qd7+ Kg6 72. Qe6+ Kg7 73. Qxf5) 68. Qd7+ Kg6 69. Qc6+ Kg7 70. Qb7+ Kf8 71. Qxa6 Qe1+ 72. Kf3 Qd1+ 73. Qe2 Qd5+ 74. Kf2 Qd8 75. a6 Qh4+ 76. Kg2 Qe7 77. Qf3 Qc7 78. b5 Qg7+ 79. Kf2 Qb2+ 80. Qe2 Qa1 81. b6 1-0