Passaggi della soluzione:

1. Riga 3 / Colonna 2 → 9 (Hidden Single)
2. Riga 8 / Colonna 5 → 6 (Hidden Single)
3. Riga 5 / Colonna 1 → 9 (Hidden Single)
4. Riga 7 / Colonna 5 → 9 (Hidden Single)
5. Riga 8 / Colonna 3 → 9 (Hidden Single)
6. Riga 3 / Colonna 5 → 1 (Hidden Single)
7. Riga 7 / Colonna 4 → 1 (Hidden Single)
8. Locked Candidates Type 1 (Pointing): 5 in b1 => r2c4789<>5
9. Locked Candidates Type 1 (Pointing): 3 in b7 => r45c2<>3
10. Locked Candidates Type 2 (Claiming): 8 in r8 => r7c789,r9c8<>8
11. 2-String Kite: 6 in r2c3,r5c8 (connected by r4c3,r5c2) => r2c8<>6
12. Discontinuous Nice Loop: 2/5/8 r3c6 =6= r3c8 -6- r5c8 =6= r5c2 =7= r6c1 -7- r8c1 -5- r2c1 -2- r1c2 -6- r1c6 =6= r3c6 => r3c6<>2, r3c6<>5, r3c6<>8
13. Riga 3 / Colonna 6 → 6 (Naked Single)
14. Locked Candidates Type 2 (Claiming): 2 in r3 => r1c78,r2c789<>2
15. Finned Jellyfish: 2 r1359 c2689 fr9c3 => r7c2<>2
16. Discontinuous Nice Loop: 2/3/8 r5c8 =6= r5c2 =7= r6c1 -7- r8c1 -5- r2c1 -2- r1c2 -6- r1c8 =6= r5c8 => r5c8<>2, r5c8<>3, r5c8<>8
17. Riga 5 / Colonna 8 → 6 (Naked Single)
18. Locked Candidates Type 1 (Pointing): 3 in b6 => r7c9<>3
19. AIC: 2/4 2- r2c5 =2= r1c6 -2- r1c2 -6- r4c2 =6= r4c3 =4= r4c5 -4 => r4c5<>2, r2c5<>4
20. Finned X-Wing: 2 c15 r26 fr4c1 => r6c3<>2
21. W-Wing: 8/4 in r6c3,r9c5 connected by 4 in r4c35 => r6c5,r9c3<>8
22. Discontinuous Nice Loop: 8 r2c5 -8- r9c5 -4- r4c5 =4= r4c3 =6= r4c2 -6- r1c2 -2- r1c6 =2= r2c5 => r2c5<>8
23. Locked Candidates Type 1 (Pointing): 8 in b2 => r59c4<>8
24. Discontinuous Nice Loop: 2/4/8 r4c3 =6= r4c2 -6- r1c2 -2- r1c6 =2= r2c5 =3= r2c4 -3- r5c4 -7- r5c2 =7= r6c1 -7- r8c1 -5- r2c1 =5= r2c3 =6= r4c3 => r4c3<>2, r4c3<>4, r4c3<>8
25. Riga 4 / Colonna 3 → 6 (Naked Single)
26. Riga 4 / Colonna 5 → 4 (Hidden Single)
27. Riga 9 / Colonna 5 → 8 (Naked Single)
28. Riga 6 / Colonna 3 → 4 (Hidden Single)
29. Riga 2 / Colonna 7 → 6 (Hidden Single)
30. Riga 1 / Colonna 2 → 6 (Hidden Single)
31. Riga 7 / Colonna 3 → 8 (Hidden Single)
32. Riga 2 / Colonna 9 → 7 (Hidden Single)
33. Riga 1 / Colonna 6 → 2 (Hidden Single)
34. Riga 2 / Colonna 5 → 3 (Naked Single)
35. Riga 6 / Colonna 5 → 2 (Full House)
36. Riga 7 / Colonna 9 → 4 (Hidden Single)
37. Riga 5 / Colonna 4 → 3 (Hidden Single)
38. Riga 9 / Colonna 6 → 4 (Hidden Single)
39. Riga 9 / Colonna 4 → 7 (Hidden Single)
40. Riga 7 / Colonna 6 → 5 (Full House)
41. Locked Candidates Type 1 (Pointing): 2 in b7 => r9c8<>2
42. Uniqueness Test 6: 2/3 in r7c28,r9c28 => r7c2,r9c8<>3
43. Riga 7 / Colonna 2 → 7 (Naked Single)
44. Riga 9 / Colonna 8 → 5 (Naked Single)
45. Riga 7 / Colonna 7 → 2 (Naked Single)
46. Riga 7 / Colonna 8 → 3 (Full House)
47. Riga 8 / Colonna 1 → 5 (Naked Single)
48. Riga 9 / Colonna 3 → 2 (Naked Single)
49. Riga 2 / Colonna 3 → 5 (Full House)
50. Riga 2 / Colonna 1 → 2 (Full House)
51. Riga 9 / Colonna 2 → 3 (Full House)
52. Riga 4 / Colonna 1 → 3 (Naked Single)
53. Riga 6 / Colonna 1 → 7 (Full House)
54. Riga 6 / Colonna 6 → 8 (Naked Single)
55. Riga 5 / Colonna 6 → 7 (Full House)
56. Riga 6 / Colonna 7 → 1 (Naked Single)
57. Riga 6 / Colonna 9 → 3 (Full House)
58. Riga 1 / Colonna 7 → 5 (Naked Single)
59. Riga 1 / Colonna 4 → 4 (Naked Single)
60. Riga 1 / Colonna 8 → 1 (Full House)
61. Riga 4 / Colonna 7 → 8 (Naked Single)
62. Riga 8 / Colonna 7 → 7 (Full House)
63. Riga 2 / Colonna 4 → 8 (Naked Single)
64. Riga 2 / Colonna 8 → 4 (Full House)
65. Riga 3 / Colonna 4 → 5 (Full House)
66. Riga 8 / Colonna 8 → 8 (Naked Single)
67. Riga 3 / Colonna 8 → 2 (Full House)
68. Riga 8 / Colonna 9 → 1 (Full House)
69. Riga 3 / Colonna 9 → 8 (Full House)
70. Riga 4 / Colonna 2 → 2 (Naked Single)
71. Riga 4 / Colonna 9 → 5 (Full House)
72. Riga 5 / Colonna 9 → 2 (Full House)
73. Riga 5 / Colonna 2 → 8 (Full House)