Good endgame and instructive strategy.

54. 07-02 19-23 55. 02x30 23-29 56. 30-24 14-19 57. 25x34 48x13

54. 07-02 19-23 55. 02x30 23-29 56. 30-19 14x23 57. 25x14 This way the battle continues. Maybe with precise play black can still win but white can search for tactics to force the draw.

54. 07-02 19-23 55. 02x30 23-29 56. 30-19 14x23 57. 25x14 48-39 58. 14-10 39-28 59. 10-04 29-33 60. 04-27 33-39 61. 27-49 28-46 62. 35-30 23-28 63. 30-25 28-33 64. 49-35 39-43 65. 35-24 33-39 66. 36-31! 26x37 67. 25-20 Nice drawing variation found with computer, with sacrifice, white goes on to second king and black cannot win.