Pasos de la solución:

1. Fila 3 / Columna 7 → 8 (Hidden Single)
2. Fila 8 / Columna 6 → 3 (Hidden Single)
3. Fila 3 / Columna 8 → 4 (Hidden Single)
4. Fila 8 / Columna 5 → 6 (Hidden Single)
5. Locked Candidates Type 1 (Pointing): 5 in b1 => r2c5<>5
6. Locked Candidates Type 1 (Pointing): 7 in b3 => r1c46<>7
7. Locked Candidates Type 1 (Pointing): 6 in b6 => r2c9<>6
8. Fila 2 / Columna 8 → 6 (Hidden Single)
9. Locked Candidates Type 1 (Pointing): 2 in b8 => r7c9<>2
10. Locked Candidates Type 1 (Pointing): 4 in b9 => r46c9<>4
11. Locked Candidates Type 1 (Pointing): 9 in b9 => r5c8<>9
12. Hidden Rectangle: 1/2 in r2c79,r8c79 => r8c9<>1
13. Discontinuous Nice Loop: 1/2/9 r2c3 =5= r2c1 =3= r2c9 =2= r8c9 =8= r8c3 =5= r2c3 => r2c3<>1, r2c3<>2, r2c3<>9
14. Fila 2 / Columna 3 → 5 (Naked Single)
15. Locked Candidates Type 2 (Claiming): 2 in r2 => r1c7<>2
16. AIC: 4 4- r4c5 =4= r6c5 =8= r6c3 -8- r8c3 =8= r8c9 =2= r8c7 -2- r2c7 -1- r6c7 -4- r5c7 =4= r5c2 -4 => r4c12<>4
17. Hidden Rectangle: 1/4 in r4c57,r6c57 => r4c5<>1
18. AIC: 4 4- r4c5 =4= r6c5 =8= r6c3 -8- r8c3 =8= r8c9 =2= r8c7 -2- r2c7 -1- r6c7 -4 => r4c7,r6c5<>4
19. Fila 4 / Columna 5 → 4 (Hidden Single)
20. AIC: 7 7- r1c7 -1- r6c7 -4- r6c1 =4= r7c1 =7= r7c8 -7 => r1c8,r8c7<>7
21. Fila 1 / Columna 7 → 7 (Hidden Single)
22. Grouped Continuous Nice Loop: 1/3 4= r5c2 =8= r79c2 -8- r8c3 =8= r8c9 =2= r8c7 -2- r2c7 -1- r6c7 -4- r6c1 =4= r5c2 =8 => r45c7,r5c2<>1, r5c2<>3
23. Naked Triple: 1,4,8 in r579c2 => r134c2<>1
24. Locked Candidates Type 2 (Claiming): 1 in c2 => r78c1,r8c3<>1
25. Locked Candidates Type 2 (Claiming): 1 in r8 => r7c89,r9c89<>1
26. Locked Triple: 2,4,8 in r789c9 => r2c9,r8c7<>2
27. Fila 2 / Columna 7 → 2 (Hidden Single)
28. Fila 8 / Columna 9 → 2 (Hidden Single)
29. Fila 8 / Columna 3 → 8 (Hidden Single)
30. Fila 6 / Columna 5 → 8 (Hidden Single)
31. Fila 5 / Columna 2 → 8 (Hidden Single)
32. Fila 5 / Columna 7 → 4 (Hidden Single)
33. Fila 6 / Columna 7 → 1 (Naked Single)
34. Fila 6 / Columna 3 → 7 (Naked Single)
35. Fila 8 / Columna 7 → 5 (Naked Single)
36. Fila 4 / Columna 7 → 9 (Full House)
37. Fila 8 / Columna 1 → 7 (Naked Single)
38. Fila 8 / Columna 8 → 1 (Full House)
39. Fila 9 / Columna 8 → 9 (Naked Single)
40. Fila 1 / Columna 8 → 3 (Naked Single)
41. Fila 2 / Columna 9 → 1 (Full House)
42. Fila 7 / Columna 8 → 7 (Naked Single)
43. Fila 5 / Columna 8 → 5 (Full House)
44. Fila 2 / Columna 5 → 9 (Naked Single)
45. Fila 2 / Columna 1 → 3 (Full House)
46. Fila 5 / Columna 6 → 1 (Naked Single)
47. Fila 4 / Columna 1 → 1 (Naked Single)
48. Fila 6 / Columna 1 → 4 (Naked Single)
49. Fila 5 / Columna 3 → 9 (Naked Single)
50. Fila 5 / Columna 4 → 3 (Full House)
51. Fila 3 / Columna 1 → 9 (Naked Single)
52. Fila 7 / Columna 1 → 5 (Full House)
53. Fila 4 / Columna 3 → 2 (Naked Single)
54. Fila 3 / Columna 3 → 1 (Full House)
55. Fila 4 / Columna 2 → 3 (Full House)
56. Fila 6 / Columna 4 → 6 (Naked Single)
57. Fila 6 / Columna 9 → 3 (Full House)
58. Fila 4 / Columna 9 → 6 (Full House)
59. Fila 7 / Columna 5 → 1 (Naked Single)
60. Fila 1 / Columna 5 → 5 (Full House)
61. Fila 7 / Columna 2 → 4 (Naked Single)
62. Fila 9 / Columna 2 → 1 (Full House)
63. Fila 9 / Columna 4 → 5 (Naked Single)
64. Fila 7 / Columna 9 → 8 (Naked Single)
65. Fila 9 / Columna 9 → 4 (Full House)
66. Fila 9 / Columna 6 → 8 (Full House)
67. Fila 4 / Columna 4 → 7 (Naked Single)
68. Fila 4 / Columna 6 → 5 (Full House)
69. Fila 7 / Columna 6 → 2 (Naked Single)
70. Fila 7 / Columna 4 → 9 (Full House)
71. Fila 3 / Columna 4 → 2 (Naked Single)
72. Fila 1 / Columna 4 → 1 (Full House)
73. Fila 1 / Columna 6 → 6 (Naked Single)
74. Fila 1 / Columna 2 → 2 (Full House)
75. Fila 3 / Columna 2 → 6 (Full House)
76. Fila 3 / Columna 6 → 7 (Full House)