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

This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), undefined, Empty Rectangle, Naked Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 8 → 5 (Hidden Single)
2. Row 7 / Column 4 → 7 (Hidden Single)
3. Row 8 / Column 1 → 4 (Hidden Single)
4. Row 5 / Column 9 → 4 (Hidden Single)
5. Row 6 / Column 8 → 6 (Hidden Single)
6. Row 9 / Column 1 → 5 (Hidden Single)
7. Row 5 / Column 2 → 7 (Hidden Single)
8. Row 3 / Column 8 → 7 (Hidden Single)
9. Row 2 / Column 1 → 7 (Hidden Single)
10. Locked Candidates Type 1 (Pointing): 3 in b4 => r2c3<>3
11. Locked Candidates Type 1 (Pointing): 1 in b5 => r278c5<>1
12. Locked Candidates Type 1 (Pointing): 2 in b5 => r5c3<>2
13. Locked Candidates Type 1 (Pointing): 8 in b6 => r789c7<>8
14. X-Wing: 9 r39 c24 => r1c24,r27c2<>9
15. Row 1 / Column 7 → 9 (Hidden Single)
16. Row 4 / Column 9 → 9 (Hidden Single)
17. Locked Candidates Type 1 (Pointing): 3 in b3 => r2c256<>3
18. Row 6 / Column 5 → 3 (Hidden Single)
19. Row 5 / Column 3 → 3 (Hidden Single)
20. Row 4 / Column 5 → 1 (Hidden Single)
21. Empty Rectangle: 6 in b7 (r28c5) => r2c2<>6
22. Row 2 / Column 2 → 1 (Naked Single)
23. Row 2 / Column 9 → 3 (Naked Single)
24. Row 3 / Column 1 → 8 (Naked Single)
25. Row 2 / Column 7 → 4 (Naked Single)
26. Row 1 / Column 8 → 1 (Full House)
27. Row 1 / Column 4 → 6 (Naked Single)
28. Row 9 / Column 8 → 8 (Naked Single)
29. Row 7 / Column 8 → 4 (Full House)
30. Row 1 / Column 1 → 2 (Naked Single)
31. Row 2 / Column 6 → 5 (Naked Single)
32. Row 5 / Column 4 → 2 (Naked Single)
33. Row 5 / Column 6 → 6 (Full House)
34. Row 1 / Column 2 → 3 (Naked Single)
35. Row 1 / Column 6 → 4 (Full House)
36. Row 4 / Column 1 → 6 (Naked Single)
37. Row 6 / Column 1 → 1 (Full House)
38. Row 2 / Column 5 → 9 (Naked Single)
39. Row 2 / Column 3 → 6 (Full House)
40. Row 3 / Column 2 → 9 (Full House)
41. Row 3 / Column 4 → 1 (Naked Single)
42. Row 3 / Column 6 → 3 (Full House)
43. Row 9 / Column 4 → 9 (Full House)
44. Row 7 / Column 5 → 5 (Naked Single)
45. Row 8 / Column 5 → 6 (Full House)
46. Row 7 / Column 7 → 2 (Naked Single)
47. Row 4 / Column 7 → 8 (Naked Single)
48. Row 4 / Column 3 → 2 (Full House)
49. Row 6 / Column 3 → 8 (Full House)
50. Row 7 / Column 2 → 8 (Naked Single)
51. Row 9 / Column 7 → 3 (Naked Single)
52. Row 9 / Column 9 → 1 (Naked Single)
53. Row 6 / Column 7 → 7 (Naked Single)
54. Row 6 / Column 9 → 2 (Full House)
55. Row 8 / Column 9 → 7 (Full House)
56. Row 8 / Column 7 → 5 (Full House)
57. Row 8 / Column 3 → 1 (Naked Single)
58. Row 7 / Column 3 → 9 (Full House)
59. Row 7 / Column 6 → 1 (Full House)
60. Row 8 / Column 2 → 2 (Naked Single)
61. Row 8 / Column 6 → 8 (Full House)
62. Row 9 / Column 6 → 2 (Full House)
63. Row 9 / Column 2 → 6 (Full House)