Passaggi della soluzione:

1. Riga 2 / Colonna 1 → 2 (Hidden Single)
2. Riga 9 / Colonna 1 → 4 (Hidden Single)
3. Riga 7 / Colonna 5 → 6 (Hidden Single)
4. Riga 9 / Colonna 5 → 2 (Hidden Single)
5. Riga 8 / Colonna 9 → 2 (Hidden Single)
6. Riga 7 / Colonna 3 → 2 (Hidden Single)
7. Riga 1 / Colonna 5 → 3 (Hidden Single)
8. Riga 4 / Colonna 4 → 2 (Hidden Single)
9. Riga 6 / Colonna 7 → 2 (Hidden Single)
10. Riga 2 / Colonna 9 → 3 (Hidden Single)
11. Riga 1 / Colonna 9 → 4 (Hidden Single)
12. Riga 3 / Colonna 5 → 4 (Hidden Single)
13. Riga 5 / Colonna 5 → 1 (Full House)
14. Riga 7 / Colonna 7 → 3 (Hidden Single)
15. Riga 5 / Colonna 6 → 4 (Hidden Single)
16. Riga 7 / Colonna 8 → 9 (Hidden Single)
17. Locked Candidates Type 2 (Claiming): 9 in r2 => r3c4<>9
18. Locked Candidates Type 2 (Claiming): 8 in r8 => r9c46<>8
19. X-Wing: 7 c28 r68 => r6c13<>7
20. Hidden Pair: 4,7 in r6c28 => r6c28<>1, r6c2<>6
21. Locked Candidates Type 1 (Pointing): 1 in b6 => r4c123<>1
22. 2-String Kite: 8 in r5c7,r7c1 (connected by r7c9,r9c7) => r5c1<>8
23. XYZ-Wing: 1/5/6 in r2c8,r3c49 => r3c7<>1
24. Finned Swordfish: 5 r357 c139 fr7c2 => r9c3<>5
25. AIC: 3 3- r6c4 =3= r9c4 =5= r9c9 =7= r9c3 -7- r8c2 =7= r6c2 =4= r4c2 =6= r2c2 -6- r1c1 =6= r1c7 =1= r9c7 -1- r9c6 -3 => r46c6,r9c4<>3
26. Riga 4 / Colonna 3 → 3 (Hidden Single)
27. Riga 9 / Colonna 6 → 3 (Hidden Single)
28. Riga 6 / Colonna 4 → 3 (Hidden Single)
29. 2-String Kite: 6 in r2c2,r6c6 (connected by r4c2,r6c1) => r2c6<>6
30. Locked Candidates Type 1 (Pointing): 6 in b2 => r5c4<>6
31. AIC: 9 9- r1c3 -1- r1c7 =1= r9c7 =8= r5c7 -8- r5c4 -9- r4c6 =9= r4c1 -9 => r13c1,r5c3<>9
32. W-Wing: 1/6 in r1c1,r3c4 connected by 6 in r2c24 => r3c13<>1
33. 2-String Kite: 1 in r3c4,r9c7 (connected by r1c7,r3c9) => r9c4<>1
34. Riga 9 / Colonna 4 → 5 (Naked Single)
35. Locked Candidates Type 1 (Pointing): 1 in b8 => r8c28<>1
36. X-Wing: 5 r28 c28 => r7c2<>5
37. Riga 7 / Colonna 2 → 1 (Naked Single)
38. Locked Candidates Type 1 (Pointing): 1 in b1 => r1c7<>1
39. Riga 9 / Colonna 7 → 1 (Hidden Single)
40. Riga 5 / Colonna 7 → 8 (Hidden Single)
41. Riga 5 / Colonna 4 → 9 (Naked Single)
42. Riga 8 / Colonna 4 → 8 (Hidden Single)
43. Riga 8 / Colonna 6 → 1 (Full House)
44. Riga 2 / Colonna 6 → 9 (Naked Single)
45. Riga 4 / Colonna 1 → 9 (Hidden Single)
46. Riga 4 / Colonna 6 → 8 (Hidden Single)
47. Riga 6 / Colonna 6 → 6 (Full House)
48. Locked Candidates Type 1 (Pointing): 6 in b6 => r3c9<>6
49. XY-Wing: 7/8/5 in r59c3,r7c1 => r5c1<>5
50. Riga 5 / Colonna 3 → 5 (Hidden Single)
51. Bivalue Universal Grave + 1 => r3c1<>5, r3c1<>7
52. Riga 3 / Colonna 1 → 6 (Naked Single)
53. Riga 1 / Colonna 1 → 1 (Naked Single)
54. Riga 2 / Colonna 2 → 5 (Naked Single)
55. Riga 3 / Colonna 4 → 1 (Naked Single)
56. Riga 2 / Colonna 4 → 6 (Full House)
57. Riga 2 / Colonna 8 → 1 (Full House)
58. Riga 3 / Colonna 7 → 9 (Naked Single)
59. Riga 1 / Colonna 7 → 6 (Full House)
60. Riga 1 / Colonna 3 → 9 (Full House)
61. Riga 3 / Colonna 9 → 5 (Full House)
62. Riga 3 / Colonna 3 → 7 (Full House)
63. Riga 5 / Colonna 1 → 7 (Naked Single)
64. Riga 5 / Colonna 9 → 6 (Full House)
65. Riga 6 / Colonna 1 → 8 (Naked Single)
66. Riga 7 / Colonna 1 → 5 (Full House)
67. Riga 7 / Colonna 9 → 8 (Full House)
68. Riga 8 / Colonna 2 → 7 (Naked Single)
69. Riga 9 / Colonna 3 → 8 (Full House)
70. Riga 6 / Colonna 3 → 1 (Full House)
71. Riga 9 / Colonna 9 → 7 (Full House)
72. Riga 4 / Colonna 9 → 1 (Full House)
73. Riga 8 / Colonna 8 → 5 (Full House)
74. Riga 4 / Colonna 8 → 4 (Naked Single)
75. Riga 4 / Colonna 2 → 6 (Full House)
76. Riga 6 / Colonna 2 → 4 (Full House)
77. Riga 6 / Colonna 8 → 7 (Full House)