Pasos de la solución:

1. Fila 3 / Columna 1 → 3 (Hidden Single)
2. Fila 8 / Columna 2 → 3 (Hidden Single)
3. Fila 8 / Columna 8 → 2 (Hidden Single)
4. Fila 4 / Columna 9 → 4 (Hidden Single)
5. Fila 2 / Columna 4 → 2 (Hidden Single)
6. Fila 1 / Columna 9 → 2 (Hidden Single)
7. Fila 4 / Columna 5 → 2 (Hidden Single)
8. Locked Candidates Type 1 (Pointing): 7 in b7 => r12c3<>7
9. Naked Triple: 1,5,9 in r489c4 => r167c4<>5, r67c4<>9, r7c4<>1
10. Swordfish: 7 c359 r579 => r579c7,r7c68<>7
11. XYZ-Wing: 5/7/9 in r4c46,r8c6 => r6c6<>5
12. Discontinuous Nice Loop: 1 r1c2 -1- r4c2 =1= r4c8 =7= r2c8 -7- r2c2 =7= r1c2 => r1c2<>1
13. Locked Candidates Type 2 (Claiming): 1 in c2 => r6c3<>1
14. AIC: 6 6- r1c5 -5- r1c2 -7- r1c7 =7= r2c8 =6= r3c8 -6 => r3c56<>6
15. Discontinuous Nice Loop: 9 r3c3 -9- r2c2 -7- r2c8 -6- r3c8 =6= r3c3 => r3c3<>9
16. Locked Candidates Type 1 (Pointing): 9 in b1 => r2c6<>9
17. Discontinuous Nice Loop: 9 r4c2 -9- r2c2 -7- r2c8 =7= r4c8 =1= r4c2 => r4c2<>9
18. Locked Candidates Type 2 (Claiming): 9 in r4 => r5c5,r6c6<>9
19. Locked Pair: 6,8 in r6c46 => r5c5,r6c3<>6
20. Naked Triple: 1,5,9 in r46c2,r6c3 => r5c13<>5, r5c3<>9
21. Locked Candidates Type 1 (Pointing): 9 in b4 => r6c9<>9
22. Empty Rectangle: 5 in b9 (r5c57) => r7c5<>5
23. Sashimi X-Wing: 5 r58 c57 fr8c4 fr8c6 => r9c5<>5
24. AIC: 6 6- r1c5 -5- r5c5 -7- r5c9 =7= r4c8 -7- r2c8 -6- r3c8 =6= r3c3 -6 => r1c13<>6
25. Locked Candidates Type 2 (Claiming): 6 in r1 => r2c6<>6
26. Discontinuous Nice Loop: 5 r1c5 -5- r1c2 -7- r1c7 =7= r8c7 -7- r8c6 =7= r4c6 -7- r5c5 -5- r1c5 => r1c5<>5
27. Fila 1 / Columna 5 → 6 (Naked Single)
28. Locked Candidates Type 1 (Pointing): 5 in b2 => r3c3<>5
29. Naked Pair: 4,8 in r1c4,r2c6 => r3c6<>4, r3c6<>8
30. Fila 3 / Columna 7 → 4 (Hidden Single)
31. Naked Triple: 5,7,9 in r348c6 => r7c6<>5, r7c6<>9
32. W-Wing: 5/9 in r3c5,r4c4 connected by 9 in r34c6 => r5c5<>5
33. Fila 5 / Columna 5 → 7 (Naked Single)
34. Fila 5 / Columna 9 → 9 (Naked Single)
35. Fila 5 / Columna 7 → 5 (Naked Single)
36. Fila 3 / Columna 5 → 5 (Hidden Single)
37. Fila 3 / Columna 6 → 9 (Naked Single)
38. Fila 4 / Columna 6 → 5 (Naked Single)
39. Fila 4 / Columna 2 → 1 (Naked Single)
40. Fila 4 / Columna 4 → 9 (Naked Single)
41. Fila 4 / Columna 8 → 7 (Full House)
42. Fila 8 / Columna 6 → 7 (Naked Single)
43. Fila 2 / Columna 8 → 6 (Naked Single)
44. Fila 8 / Columna 7 → 1 (Naked Single)
45. Fila 8 / Columna 4 → 5 (Full House)
46. Fila 2 / Columna 1 → 4 (Naked Single)
47. Fila 3 / Columna 8 → 1 (Naked Single)
48. Fila 7 / Columna 7 → 9 (Naked Single)
49. Fila 9 / Columna 4 → 1 (Naked Single)
50. Fila 2 / Columna 6 → 8 (Naked Single)
51. Fila 1 / Columna 4 → 4 (Full House)
52. Fila 3 / Columna 9 → 8 (Naked Single)
53. Fila 1 / Columna 7 → 7 (Full House)
54. Fila 9 / Columna 7 → 8 (Full House)
55. Fila 3 / Columna 3 → 6 (Full House)
56. Fila 6 / Columna 8 → 3 (Naked Single)
57. Fila 6 / Columna 9 → 1 (Full House)
58. Fila 7 / Columna 8 → 5 (Full House)
59. Fila 7 / Columna 5 → 3 (Naked Single)
60. Fila 9 / Columna 5 → 9 (Full House)
61. Fila 9 / Columna 1 → 5 (Naked Single)
62. Fila 2 / Columna 3 → 9 (Naked Single)
63. Fila 2 / Columna 2 → 7 (Full House)
64. Fila 6 / Columna 6 → 6 (Naked Single)
65. Fila 6 / Columna 4 → 8 (Full House)
66. Fila 7 / Columna 4 → 6 (Full House)
67. Fila 7 / Columna 6 → 4 (Full House)
68. Fila 1 / Columna 2 → 5 (Naked Single)
69. Fila 6 / Columna 2 → 9 (Full House)
70. Fila 6 / Columna 3 → 5 (Full House)
71. Fila 5 / Columna 3 → 2 (Naked Single)
72. Fila 5 / Columna 1 → 6 (Full House)
73. Fila 7 / Columna 9 → 7 (Naked Single)
74. Fila 9 / Columna 9 → 3 (Full House)
75. Fila 9 / Columna 3 → 7 (Full House)
76. Fila 1 / Columna 1 → 1 (Naked Single)
77. Fila 1 / Columna 3 → 8 (Full House)
78. Fila 7 / Columna 3 → 1 (Full House)
79. Fila 7 / Columna 1 → 2 (Full House)