Pasos de la solución:

1. Fila 2 / Columna 2 → 4 (Hidden Single)
2. Fila 6 / Columna 6 → 4 (Hidden Single)
3. Fila 8 / Columna 8 → 7 (Hidden Single)
4. Fila 7 / Columna 3 → 7 (Hidden Single)
5. Fila 6 / Columna 8 → 2 (Hidden Single)
6. Fila 4 / Columna 6 → 2 (Hidden Single)
7. Fila 4 / Columna 9 → 7 (Hidden Single)
8. Fila 1 / Columna 7 → 7 (Hidden Single)
9. Fila 2 / Columna 5 → 7 (Hidden Single)
10. Fila 3 / Columna 7 → 5 (Hidden Single)
11. Fila 1 / Columna 1 → 5 (Hidden Single)
12. Fila 7 / Columna 7 → 4 (Hidden Single)
13. Locked Candidates Type 1 (Pointing): 8 in b1 => r59c3<>8
14. Locked Candidates Type 1 (Pointing): 6 in b6 => r5c3<>6
15. Locked Candidates Type 1 (Pointing): 9 in b9 => r7c456<>9
16. Naked Triple: 1,2,8 in r2c389 => r2c46<>1
17. X-Wing: 8 r59 c15 => r7c15<>8
18. 2-String Kite: 6 in r3c4,r7c8 (connected by r1c8,r3c9) => r7c4<>6
19. 2-String Kite: 9 in r3c1,r6c4 (connected by r5c1,r6c3) => r3c4<>9
20. Hidden Rectangle: 1/8 in r1c38,r2c38 => r1c3<>1
21. AIC: 3/6 6- r9c3 =6= r6c3 =9= r6c4 -9- r4c4 =9= r4c8 -9- r7c8 =9= r7c9 =3= r9c9 -3 => r9c3<>3, r9c9<>6
22. Fila 5 / Columna 3 → 3 (Hidden Single)
23. Discontinuous Nice Loop: 1 r5c5 -1- r6c4 -9- r6c3 =9= r5c1 =8= r5c5 => r5c5<>1
24. Discontinuous Nice Loop: 1 r5c6 -1- r6c4 -9- r6c3 =9= r5c1 =8= r5c5 =5= r5c6 => r5c6<>1
25. Locked Candidates Type 1 (Pointing): 1 in b5 => r378c4<>1
26. Fila 3 / Columna 4 → 6 (Naked Single)
27. Discontinuous Nice Loop: 1 r7c9 -1- r9c7 -6- r5c7 =6= r5c9 =9= r7c9 => r7c9<>1
28. Discontinuous Nice Loop: 3 r7c9 -3- r9c9 -1- r9c7 -6- r5c7 =6= r5c9 =9= r7c9 => r7c9<>3
29. Fila 9 / Columna 9 → 3 (Hidden Single)
30. Discontinuous Nice Loop: 5 r8c4 -5- r8c2 =5= r7c2 =8= r7c4 -8- r4c4 =8= r5c5 =5= r5c6 -5- r2c6 =5= r2c4 -5- r8c4 => r8c4<>5
31. AIC: 1 1- r8c1 -3- r8c4 -9- r6c4 =9= r6c3 =6= r9c3 -6- r9c7 -1 => r9c13<>1
32. Discontinuous Nice Loop: 1 r3c1 -1- r8c1 -3- r8c4 -9- r6c4 =9= r6c3 -9- r5c1 =9= r3c1 => r3c1<>1
33. Locked Candidates Type 1 (Pointing): 1 in b1 => r6c3<>1
34. AIC: 8 8- r1c3 -9- r6c3 -6- r9c3 =6= r9c7 =1= r7c8 -1- r2c8 -8 => r1c8,r2c3<>8
35. Fila 1 / Columna 3 → 8 (Hidden Single)
36. Fila 2 / Columna 8 → 8 (Hidden Single)
37. Locked Candidates Type 1 (Pointing): 9 in b1 => r3c5<>9
38. Hidden Rectangle: 1/4 in r1c59,r3c59 => r1c9<>1
39. Discontinuous Nice Loop: 1 r8c6 -1- r9c5 =1= r9c7 =6= r9c3 -6- r8c2 =6= r8c6 => r8c6<>1
40. Finned Jellyfish: 1 c2468 r1467 fr8c2 => r7c1<>1
41. Discontinuous Nice Loop: 3 r7c4 -3- r7c1 -2- r7c5 =2= r9c5 =8= r7c4 => r7c4<>3
42. Sue de Coq: r789c5 - {12589} (r13c5 - {149}, r7c4 - {58}) => r78c6<>5, r5c5<>9
43. AIC: 1 1- r4c2 -8- r4c4 =8= r7c4 =5= r2c4 =3= r8c4 -3- r8c1 -1 => r5c1,r78c2<>1
44. Fila 8 / Columna 1 → 1 (Hidden Single)
45. Fila 7 / Columna 1 → 3 (Hidden Single)
46. Fila 7 / Columna 5 → 2 (Hidden Single)
47. Locked Candidates Type 2 (Claiming): 1 in r5 => r4c8<>1
48. Fila 4 / Columna 8 → 9 (Naked Single)
49. Fila 7 / Columna 9 → 9 (Hidden Single)
50. Naked Pair: 1,6 in r7c68 => r7c2<>6
51. X-Wing: 1 c68 r17 => r1c5<>1
52. W-Wing: 5/9 in r5c6,r8c5 connected by 9 in r1c56 => r5c5<>5
53. Fila 5 / Columna 5 → 8 (Naked Single)
54. Fila 4 / Columna 4 → 1 (Naked Single)
55. Fila 4 / Columna 2 → 8 (Full House)
56. Fila 5 / Columna 1 → 9 (Naked Single)
57. Fila 9 / Columna 5 → 1 (Naked Single)
58. Fila 6 / Columna 4 → 9 (Naked Single)
59. Fila 5 / Columna 6 → 5 (Full House)
60. Fila 7 / Columna 2 → 5 (Naked Single)
61. Fila 3 / Columna 1 → 2 (Naked Single)
62. Fila 9 / Columna 1 → 8 (Full House)
63. Fila 6 / Columna 3 → 6 (Naked Single)
64. Fila 6 / Columna 2 → 1 (Full House)
65. Fila 8 / Columna 2 → 6 (Full House)
66. Fila 9 / Columna 3 → 2 (Full House)
67. Fila 9 / Columna 7 → 6 (Full House)
68. Fila 5 / Columna 7 → 1 (Full House)
69. Fila 7 / Columna 8 → 1 (Full House)
70. Fila 5 / Columna 9 → 6 (Full House)
71. Fila 1 / Columna 8 → 6 (Full House)
72. Fila 3 / Columna 5 → 4 (Naked Single)
73. Fila 7 / Columna 6 → 6 (Naked Single)
74. Fila 7 / Columna 4 → 8 (Full House)
75. Fila 8 / Columna 4 → 3 (Naked Single)
76. Fila 2 / Columna 4 → 5 (Full House)
77. Fila 2 / Columna 6 → 3 (Naked Single)
78. Fila 2 / Columna 3 → 1 (Naked Single)
79. Fila 2 / Columna 9 → 2 (Full House)
80. Fila 3 / Columna 3 → 9 (Full House)
81. Fila 3 / Columna 9 → 1 (Full House)
82. Fila 1 / Columna 9 → 4 (Full House)
83. Fila 1 / Columna 5 → 9 (Naked Single)
84. Fila 1 / Columna 6 → 1 (Full House)
85. Fila 8 / Columna 6 → 9 (Full House)
86. Fila 8 / Columna 5 → 5 (Full House)