Pasos de la solución:

1. Fila 1 / Columna 6 → 5 (Hidden Single)
2. Fila 8 / Columna 2 → 4 (Hidden Single)
3. Fila 6 / Columna 3 → 1 (Hidden Single)
4. Fila 4 / Columna 7 → 1 (Hidden Single)
5. Fila 6 / Columna 2 → 5 (Hidden Single)
6. Fila 9 / Columna 3 → 5 (Hidden Single)
7. Fila 7 / Columna 1 → 1 (Hidden Single)
8. Locked Triple: 1,7,8 in r8c456 => r8c789<>8, r79c5,r8c89<>7
9. Locked Candidates Type 1 (Pointing): 6 in b1 => r3c789<>6
10. Locked Candidates Type 1 (Pointing): 4 in b6 => r5c5<>4
11. Locked Candidates Type 1 (Pointing): 3 in b8 => r6c5<>3
12. Locked Candidates Type 1 (Pointing): 9 in b8 => r35c5<>9
13. Locked Candidates Type 1 (Pointing): 7 in b9 => r13c9<>7
14. Locked Candidates Type 2 (Claiming): 3 in c8 => r4c9<>3
15. Uniqueness Test 2: 3/9 in r7c57,r9c57 => r135c7,r79c9<>8
16. Empty Rectangle: 8 in b3 (r34c2) => r4c9<>8
17. Hidden Rectangle: 3/8 in r4c48,r6c48 => r4c8<>8
18. Hidden Rectangle: 1/7 in r3c45,r8c45 => r3c4<>7
19. AIC: 7 7- r3c8 =7= r2c8 =6= r2c7 =4= r2c6 -4- r6c6 -8- r8c6 =8= r8c4 =1= r3c4 =9= r3c2 -9- r2c2 -7 => r2c8,r3c123<>7
20. Fila 3 / Columna 8 → 7 (Hidden Single)
21. Locked Candidates Type 1 (Pointing): 8 in b3 => r5c9<>8
22. Continuous Nice Loop: 2/6/8 8= r5c8 =5= r8c8 =2= r2c8 =6= r2c7 =4= r2c6 -4- r6c6 -8- r6c8 =8= r5c8 =5 => r2c7<>2, r58c8<>6, r6c4<>8
23. Fila 6 / Columna 4 → 3 (Naked Single)
24. Fila 4 / Columna 8 → 3 (Hidden Single)
25. Continuous Nice Loop: 2/6/7/8 6= r4c1 =2= r4c4 -2- r2c4 =2= r2c8 =6= r6c8 -6- r4c9 =6= r4c1 =2 => r35c4<>2, r5c79<>6, r4c1<>7, r4c1<>8
26. Sue de Coq: r5c13 - {2678} (r5c4789 - {45789}, r4c1 - {26}) => r5c5<>7
27. Empty Rectangle: 7 in b5 (r24c2) => r2c4<>7
28. W-Wing: 8/7 in r4c2,r8c6 connected by 7 in r2c26 => r4c6<>8
29. Sue de Coq: r123c7 - {23456} (r579c7 - {34589}, r2c8 - {26}) => r8c7<>5
30. XY-Chain: 2 2- r4c1 -6- r4c9 -9- r4c6 -7- r8c6 -8- r6c6 -4- r6c5 -6- r5c5 -2 => r4c4,r5c13<>2
31. Fila 4 / Columna 1 → 2 (Hidden Single)
32. Fila 2 / Columna 4 → 2 (Hidden Single)
33. Fila 2 / Columna 8 → 6 (Naked Single)
34. Fila 2 / Columna 7 → 4 (Naked Single)
35. Fila 6 / Columna 8 → 8 (Naked Single)
36. Fila 5 / Columna 8 → 5 (Naked Single)
37. Fila 8 / Columna 8 → 2 (Full House)
38. Fila 6 / Columna 6 → 4 (Naked Single)
39. Fila 6 / Columna 5 → 6 (Full House)
40. Fila 5 / Columna 7 → 9 (Naked Single)
41. Fila 8 / Columna 7 → 6 (Naked Single)
42. Fila 5 / Columna 5 → 2 (Naked Single)
43. Fila 4 / Columna 9 → 6 (Naked Single)
44. Fila 5 / Columna 9 → 4 (Full House)
45. Fila 8 / Columna 9 → 5 (Naked Single)
46. Fila 3 / Columna 9 → 8 (Naked Single)
47. Fila 1 / Columna 9 → 3 (Naked Single)
48. Fila 3 / Columna 2 → 9 (Naked Single)
49. Fila 1 / Columna 7 → 2 (Naked Single)
50. Fila 3 / Columna 7 → 5 (Full House)
51. Fila 2 / Columna 2 → 7 (Naked Single)
52. Fila 2 / Columna 6 → 9 (Full House)
53. Fila 4 / Columna 2 → 8 (Full House)
54. Fila 3 / Columna 4 → 1 (Naked Single)
55. Fila 1 / Columna 3 → 8 (Naked Single)
56. Fila 4 / Columna 6 → 7 (Naked Single)
57. Fila 4 / Columna 4 → 9 (Full House)
58. Fila 5 / Columna 4 → 8 (Full House)
59. Fila 8 / Columna 6 → 8 (Full House)
60. Fila 8 / Columna 4 → 7 (Full House)
61. Fila 8 / Columna 5 → 1 (Full House)
62. Fila 3 / Columna 5 → 4 (Naked Single)
63. Fila 1 / Columna 5 → 7 (Full House)
64. Fila 1 / Columna 1 → 4 (Full House)
65. Fila 7 / Columna 3 → 7 (Naked Single)
66. Fila 9 / Columna 1 → 8 (Full House)
67. Fila 3 / Columna 1 → 6 (Naked Single)
68. Fila 3 / Columna 3 → 2 (Full House)
69. Fila 5 / Columna 3 → 6 (Full House)
70. Fila 5 / Columna 1 → 7 (Full House)
71. Fila 7 / Columna 9 → 9 (Naked Single)
72. Fila 9 / Columna 9 → 7 (Full House)
73. Fila 9 / Columna 7 → 3 (Naked Single)
74. Fila 7 / Columna 7 → 8 (Full House)
75. Fila 7 / Columna 5 → 3 (Full House)
76. Fila 9 / Columna 5 → 9 (Full House)