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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Locked Pair, Locked Candidates Type 1 (Pointing), Hidden Pair, undefined, Uniqueness Test 3, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 3 → 1 (Hidden Single)
2. Row 1 / Column 1 → 8 (Hidden Single)
3. Row 7 / Column 5 → 8 (Hidden Single)
4. Row 6 / Column 3 → 8 (Hidden Single)
5. Row 6 / Column 8 → 9 (Naked Single)
6. Row 4 / Column 8 → 8 (Naked Single)
7. Row 2 / Column 9 → 8 (Hidden Single)
8. Row 8 / Column 7 → 8 (Hidden Single)
9. Locked Pair: 5,7 in r6c45 => r4c4,r5c5,r6c2<>7, r5c5<>5
10. Locked Pair: 6,7 in r4c79 => r4c26,r5c79<>6, r4c2,r5c79<>7
11. Row 6 / Column 6 → 6 (Hidden Single)
12. Row 6 / Column 2 → 3 (Naked Single)
13. Row 4 / Column 2 → 9 (Naked Single)
14. Row 4 / Column 4 → 4 (Naked Single)
15. Row 4 / Column 6 → 3 (Naked Single)
16. Row 5 / Column 5 → 9 (Naked Single)
17. Locked Candidates Type 1 (Pointing): 5 in b9 => r9c3<>5
18. Hidden Pair: 1,5 in r1c5,r2c4 => r1c5,r2c4<>7, r2c4<>2, r2c4<>9
19. Locked Candidates Type 1 (Pointing): 7 in b2 => r3c1379<>7
20. X-Wing: 4 c68 r28 => r8c13<>4
21. Uniqueness Test 3: 2/5 in r5c79,r9c79 => r9c3<>4, r9c3<>9
22. Row 9 / Column 3 → 2 (Naked Single)
23. Row 7 / Column 2 → 6 (Naked Single)
24. Row 5 / Column 2 → 7 (Naked Single)
25. Row 5 / Column 1 → 4 (Naked Single)
26. Row 5 / Column 3 → 6 (Full House)
27. Row 8 / Column 2 → 5 (Naked Single)
28. Row 2 / Column 2 → 2 (Full House)
29. Row 8 / Column 1 → 7 (Hidden Single)
30. Row 8 / Column 3 → 9 (Naked Single)
31. Row 3 / Column 3 → 3 (Naked Single)
32. Row 9 / Column 1 → 1 (Naked Single)
33. Row 3 / Column 1 → 9 (Naked Single)
34. Row 7 / Column 1 → 3 (Full House)
35. Row 7 / Column 3 → 4 (Full House)
36. Row 9 / Column 5 → 4 (Naked Single)
37. Row 3 / Column 5 → 7 (Naked Single)
38. Row 8 / Column 6 → 2 (Naked Single)
39. Row 3 / Column 4 → 2 (Naked Single)
40. Row 6 / Column 5 → 5 (Naked Single)
41. Row 1 / Column 5 → 1 (Full House)
42. Row 6 / Column 4 → 7 (Full House)
43. Row 1 / Column 6 → 9 (Naked Single)
44. Row 2 / Column 6 → 4 (Full House)
45. Row 2 / Column 4 → 5 (Full House)
46. Row 8 / Column 4 → 1 (Naked Single)
47. Row 7 / Column 4 → 9 (Full House)
48. Row 8 / Column 8 → 4 (Full House)
49. Row 3 / Column 7 → 6 (Naked Single)
50. Row 3 / Column 9 → 4 (Full House)
51. Row 1 / Column 8 → 2 (Naked Single)
52. Row 2 / Column 8 → 1 (Full House)
53. Row 2 / Column 3 → 7 (Naked Single)
54. Row 1 / Column 3 → 5 (Full House)
55. Row 2 / Column 7 → 9 (Full House)
56. Row 7 / Column 9 → 2 (Naked Single)
57. Row 7 / Column 7 → 1 (Full House)
58. Row 4 / Column 7 → 7 (Naked Single)
59. Row 4 / Column 9 → 6 (Full House)
60. Row 1 / Column 9 → 7 (Naked Single)
61. Row 1 / Column 7 → 3 (Full House)
62. Row 9 / Column 7 → 5 (Naked Single)
63. Row 5 / Column 7 → 2 (Full House)
64. Row 5 / Column 9 → 5 (Full House)
65. Row 9 / Column 9 → 9 (Full House)