64...31-36?
64... 25-30! 65. 24x35 31-36 66. 41-37 45-50 en nu:
1) 67. 39-34 50-28 68. 38-32 28-14 69. 34-29 36-41 70. 37x46 14x37+;
2) 67. 38-33 50-45 68. 33-28 45-50 69. 39-33 50-44 70. 33-29 44x22 71. 29-23 22-13+.
...
71. 30-25 (!) (71. 30-24? 39-33 72. 24-19 33-47+).