7
1
2
3
5
6
3
8
4
9
8
2
4
1
3
7
9
4
5
1
9
1
4
5

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Discontinuous Nice Loop, Grouped Discontinuous Nice Loop, Naked Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 9 / Column 3 → 4 (Hidden Single)
2. Row 8 / Column 8 → 3 (Hidden Single)
3. Row 4 / Column 6 → 3 (Hidden Single)
4. Locked Candidates Type 1 (Pointing): 5 in b3 => r1c13<>5
5. Locked Candidates Type 1 (Pointing): 6 in b9 => r456c9<>6
6. Locked Candidates Type 2 (Claiming): 9 in r2 => r1c456,r3c5<>9
7. Row 5 / Column 5 → 9 (Hidden Single)
8. Row 4 / Column 9 → 9 (Hidden Single)
9. Row 5 / Column 4 → 4 (Hidden Single)
10. Locked Candidates Type 2 (Claiming): 6 in r5 => r4c123,r6c2<>6
11. Finned X-Wing: 7 c68 r26 fr4c8 => r6c9<>7
12. Discontinuous Nice Loop: 2 r3c9 -2- r1c8 -4- r1c5 =4= r3c5 =1= r3c9 => r3c9<>2
13. Grouped Discontinuous Nice Loop: 1/6 r1c5 =4= r1c8 -4- r2c8 -7- r2c46 =7= r3c5 =4= r1c5 => r1c5<>1, r1c5<>6
14. Row 1 / Column 5 → 4 (Naked Single)
15. Row 1 / Column 8 → 2 (Naked Single)
16. Row 2 / Column 8 → 4 (Hidden Single)
17. Row 3 / Column 2 → 4 (Hidden Single)
18. Row 6 / Column 9 → 2 (Hidden Single)
19. Row 6 / Column 2 → 8 (Hidden Single)
20. Row 2 / Column 2 → 5 (Naked Single)
21. Row 2 / Column 3 → 8 (Naked Single)
22. Row 6 / Column 4 → 5 (Hidden Single)
23. Row 6 / Column 5 → 1 (Hidden Single)
24. Row 3 / Column 9 → 1 (Hidden Single)
25. Row 1 / Column 9 → 5 (Naked Single)
26. Row 1 / Column 7 → 9 (Naked Single)
27. Row 3 / Column 7 → 7 (Full House)
28. Row 3 / Column 5 → 6 (Naked Single)
29. Row 1 / Column 6 → 8 (Naked Single)
30. Row 3 / Column 3 → 2 (Naked Single)
31. Row 3 / Column 1 → 9 (Full House)
32. Row 1 / Column 4 → 1 (Naked Single)
33. Row 8 / Column 3 → 6 (Naked Single)
34. Row 1 / Column 3 → 3 (Naked Single)
35. Row 1 / Column 1 → 6 (Full House)
36. Row 8 / Column 2 → 2 (Naked Single)
37. Row 8 / Column 6 → 9 (Naked Single)
38. Row 8 / Column 4 → 8 (Full House)
39. Row 4 / Column 2 → 1 (Naked Single)
40. Row 2 / Column 6 → 7 (Naked Single)
41. Row 2 / Column 4 → 9 (Full House)
42. Row 6 / Column 6 → 6 (Full House)
43. Row 4 / Column 4 → 7 (Full House)
44. Row 6 / Column 8 → 7 (Full House)
45. Row 4 / Column 8 → 6 (Full House)
46. Row 7 / Column 2 → 3 (Naked Single)
47. Row 5 / Column 2 → 6 (Full House)
48. Row 4 / Column 3 → 5 (Naked Single)
49. Row 4 / Column 1 → 2 (Full House)
50. Row 5 / Column 9 → 8 (Naked Single)
51. Row 5 / Column 7 → 5 (Full House)
52. Row 7 / Column 5 → 7 (Naked Single)
53. Row 9 / Column 5 → 3 (Full House)
54. Row 9 / Column 1 → 8 (Naked Single)
55. Row 5 / Column 1 → 3 (Naked Single)
56. Row 5 / Column 3 → 7 (Full House)
57. Row 7 / Column 3 → 1 (Full House)
58. Row 7 / Column 1 → 5 (Full House)
59. Row 7 / Column 9 → 6 (Naked Single)
60. Row 9 / Column 9 → 7 (Full House)
61. Row 9 / Column 7 → 2 (Naked Single)
62. Row 7 / Column 7 → 8 (Full House)
63. Row 7 / Column 4 → 2 (Full House)
64. Row 9 / Column 4 → 6 (Full House)