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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, undefined, Naked Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 9 / Column 5 → 2 (Hidden Single)
2. Row 1 / Column 5 → 4 (Hidden Single)
3. Locked Candidates Type 1 (Pointing): 1 in b2 => r5c6<>1
4. Locked Candidates Type 1 (Pointing): 6 in b2 => r1c123<>6
5. Locked Candidates Type 1 (Pointing): 6 in b5 => r5c12<>6
6. Row 9 / Column 2 → 6 (Hidden Single)
7. Row 8 / Column 9 → 6 (Hidden Single)
8. Row 9 / Column 1 → 4 (Hidden Single)
9. Row 5 / Column 2 → 4 (Hidden Single)
10. Row 6 / Column 9 → 4 (Hidden Single)
11. Locked Candidates Type 1 (Pointing): 3 in b8 => r5c4<>3
12. Locked Candidates Type 2 (Claiming): 5 in r8 => r7c12,r9c3<>5
13. Row 1 / Column 2 → 5 (Hidden Single)
14. Row 2 / Column 9 → 5 (Hidden Single)
15. Naked Triple: 1,2,3 in r56c1,r6c3 => r4c13<>3
16. Naked Triple: 7,8,9 in r79c6,r8c5 => r79c4<>9, r9c4<>7
17. Naked Triple: 5,6,9 in r248c3 => r19c3<>9
18. X-Wing: 2 c37 r16 => r1c189,r6c1<>2
19. X-Wing: 7 r68 c57 => r129c7,r25c5<>7
20. Row 2 / Column 1 → 7 (Hidden Single)
21. Row 2 / Column 3 → 6 (Hidden Single)
22. Row 4 / Column 3 → 5 (Naked Single)
23. Row 4 / Column 1 → 6 (Naked Single)
24. Row 8 / Column 3 → 9 (Naked Single)
25. Row 8 / Column 1 → 5 (Hidden Single)
26. Locked Candidates Type 1 (Pointing): 8 in b7 => r7c689<>8
27. Row 7 / Column 6 → 9 (Naked Single)
28. X-Wing: 8 r28 c57 => r149c7<>8
29. Row 4 / Column 9 → 8 (Hidden Single)
30. X-Wing: 9 r24 c57 => r19c7,r5c5<>9
31. Row 9 / Column 7 → 1 (Naked Single)
32. Row 7 / Column 9 → 2 (Naked Single)
33. Row 9 / Column 3 → 3 (Naked Single)
34. Row 7 / Column 8 → 5 (Naked Single)
35. Row 1 / Column 3 → 2 (Naked Single)
36. Row 6 / Column 3 → 1 (Full House)
37. Row 7 / Column 2 → 8 (Naked Single)
38. Row 3 / Column 2 → 3 (Full House)
39. Row 7 / Column 1 → 1 (Full House)
40. Row 7 / Column 4 → 3 (Full House)
41. Row 9 / Column 4 → 5 (Naked Single)
42. Row 1 / Column 7 → 3 (Naked Single)
43. Row 6 / Column 1 → 3 (Naked Single)
44. Row 5 / Column 1 → 2 (Full House)
45. Row 4 / Column 7 → 9 (Naked Single)
46. Row 4 / Column 5 → 3 (Full House)
47. Row 6 / Column 5 → 7 (Naked Single)
48. Row 6 / Column 7 → 2 (Full House)
49. Row 2 / Column 7 → 8 (Naked Single)
50. Row 2 / Column 5 → 9 (Full House)
51. Row 8 / Column 7 → 7 (Full House)
52. Row 8 / Column 5 → 8 (Full House)
53. Row 5 / Column 5 → 1 (Full House)
54. Row 9 / Column 6 → 7 (Full House)
55. Row 5 / Column 8 → 7 (Naked Single)
56. Row 5 / Column 9 → 3 (Full House)
57. Row 5 / Column 6 → 6 (Naked Single)
58. Row 5 / Column 4 → 9 (Full House)
59. Row 3 / Column 4 → 7 (Naked Single)
60. Row 1 / Column 4 → 6 (Full House)
61. Row 9 / Column 9 → 9 (Naked Single)
62. Row 9 / Column 8 → 8 (Full House)
63. Row 1 / Column 8 → 9 (Naked Single)
64. Row 3 / Column 8 → 2 (Full House)
65. Row 3 / Column 9 → 1 (Naked Single)
66. Row 1 / Column 9 → 7 (Full House)
67. Row 1 / Column 1 → 8 (Naked Single)
68. Row 1 / Column 6 → 1 (Full House)
69. Row 3 / Column 6 → 8 (Full House)
70. Row 3 / Column 1 → 9 (Full House)