Pasos de la solución:

1. Fila 4 / Columna 7 → 7 (Hidden Single)
2. Fila 5 / Columna 5 → 2 (Hidden Single)
3. Locked Candidates Type 1 (Pointing): 4 in b5 => r78c4<>4
4. Locked Candidates Type 1 (Pointing): 8 in b5 => r12c6<>8
5. Locked Candidates Type 1 (Pointing): 5 in b8 => r7c789<>5
6. Finned Swordfish: 1 c157 r357 fr2c7 => r3c9<>1
7. Locked Candidates Type 1 (Pointing): 1 in b3 => r5c7<>1
8. Continuous Nice Loop: 1/2/4/8/9 2= r6c9 =1= r5c9 -1- r5c1 =1= r7c1 =2= r3c1 -2- r3c9 =2= r6c9 =1 => r5c36<>1, r3c23<>2, r6c9,r7c1<>4, r6c9,r7c1<>8, r7c1<>9
9. Grouped Discontinuous Nice Loop: 8 r1c3 -8- r1c5 =8= r3c5 =1= r7c5 -1- r7c1 =1= r5c1 =8= r13c1 -8- r1c3 => r1c3<>8
10. Grouped Discontinuous Nice Loop: 8 r1c7 -8- r1c5 =8= r3c5 =1= r7c5 -1- r7c1 =1= r5c1 =8= r13c1 -8- r2c23 =8= r2c78 -8- r1c7 => r1c7<>8
11. Grouped Discontinuous Nice Loop: 8 r1c9 -8- r1c5 =8= r3c5 =1= r7c5 -1- r7c1 =1= r5c1 =8= r13c1 -8- r2c23 =8= r2c78 -8- r1c9 => r1c9<>8
12. Grouped Discontinuous Nice Loop: 1 r6c4 -1- r6c9 =1= r5c9 -1- r5c1 =1= r7c1 -1- r7c5 =1= r3c5 =8= r1c5 =6= r1c6 -6- r56c6 =6= r6c4 => r6c4<>1
13. Grouped Discontinuous Nice Loop: 1 r7c6 -1- r7c5 =1= r3c5 =8= r1c5 =6= r1c6 -6- r56c6 =6= r6c4 =4= r4c4 =1= r46c6 -1- r7c6 => r7c6<>1
14. Grouped Discontinuous Nice Loop: 1 r8c6 -1- r7c5 =1= r3c5 =8= r1c5 =6= r1c6 -6- r56c6 =6= r6c4 =4= r4c4 =1= r46c6 -1- r8c6 => r8c6<>1
15. Almost Locked Set XZ-Rule: A=r1c179 {4589}, B=r3c1579 {12589}, X=5, Z=8 => r3c23<>8
16. Almost Locked Set XZ-Rule: A=r1c179 {4589}, B=r3c57 {158}, X=5, Z=8 => r3c1<>8
17. XY-Chain: 1 1- r3c5 -8- r1c5 -6- r9c5 -4- r9c1 -9- r3c1 -2- r7c1 -1 => r7c5<>1
18. Fila 3 / Columna 5 → 1 (Hidden Single)
19. Fila 2 / Columna 7 → 1 (Hidden Single)
20. Fila 1 / Columna 5 → 8 (Hidden Single)
21. Fila 5 / Columna 1 → 8 (Hidden Single)
22. Fila 1 / Columna 6 → 6 (Hidden Single)
23. Fila 5 / Columna 6 → 3 (Naked Single)
24. Fila 5 / Columna 9 → 1 (Hidden Single)
25. Fila 6 / Columna 9 → 2 (Naked Single)
26. Fila 7 / Columna 1 → 1 (Hidden Single)
27. Fila 6 / Columna 4 → 6 (Hidden Single)
28. Fila 6 / Columna 2 → 4 (Naked Single)
29. Fila 6 / Columna 3 → 1 (Naked Single)
30. Fila 6 / Columna 6 → 8 (Naked Single)
31. Fila 6 / Columna 8 → 3 (Full House)
32. Fila 4 / Columna 6 → 1 (Naked Single)
33. Fila 4 / Columna 4 → 4 (Full House)
34. Fila 1 / Columna 3 → 3 (Hidden Single)
35. Fila 3 / Columna 4 → 3 (Hidden Single)
36. Fila 3 / Columna 1 → 2 (Hidden Single)
37. Fila 2 / Columna 8 → 2 (Hidden Single)
38. Fila 8 / Columna 4 → 1 (Hidden Single)
39. Fila 4 / Columna 8 → 8 (Hidden Single)
40. Fila 2 / Columna 3 → 4 (Hidden Single)
41. Fila 1 / Columna 1 → 9 (Naked Single)
42. Fila 9 / Columna 1 → 4 (Full House)
43. Fila 9 / Columna 5 → 6 (Naked Single)
44. Fila 7 / Columna 5 → 4 (Full House)
45. Fila 7 / Columna 8 → 9 (Naked Single)
46. Fila 7 / Columna 4 → 5 (Naked Single)
47. Fila 2 / Columna 4 → 9 (Full House)
48. Fila 2 / Columna 6 → 5 (Full House)
49. Fila 2 / Columna 2 → 8 (Full House)
50. Fila 8 / Columna 8 → 4 (Naked Single)
51. Fila 5 / Columna 8 → 5 (Full House)
52. Fila 5 / Columna 7 → 4 (Full House)
53. Fila 7 / Columna 6 → 7 (Naked Single)
54. Fila 8 / Columna 6 → 9 (Full House)
55. Fila 1 / Columna 7 → 5 (Naked Single)
56. Fila 1 / Columna 9 → 4 (Full House)
57. Fila 7 / Columna 9 → 8 (Naked Single)
58. Fila 3 / Columna 7 → 8 (Naked Single)
59. Fila 3 / Columna 9 → 9 (Full House)
60. Fila 9 / Columna 7 → 3 (Naked Single)
61. Fila 7 / Columna 7 → 6 (Full House)
62. Fila 8 / Columna 9 → 7 (Naked Single)
63. Fila 9 / Columna 9 → 5 (Full House)
64. Fila 7 / Columna 3 → 2 (Naked Single)
65. Fila 7 / Columna 2 → 3 (Full House)
66. Fila 8 / Columna 2 → 6 (Naked Single)
67. Fila 8 / Columna 3 → 8 (Full House)
68. Fila 4 / Columna 3 → 5 (Naked Single)
69. Fila 4 / Columna 2 → 2 (Full House)
70. Fila 5 / Columna 2 → 9 (Naked Single)
71. Fila 5 / Columna 3 → 6 (Full House)
72. Fila 3 / Columna 3 → 7 (Naked Single)
73. Fila 3 / Columna 2 → 5 (Full House)
74. Fila 9 / Columna 2 → 7 (Full House)
75. Fila 9 / Columna 3 → 9 (Full House)