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

This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Full House, undefined, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 3 → 2 (Hidden Single)
2. Row 6 / Column 4 → 1 (Hidden Single)
3. Row 6 / Column 2 → 9 (Hidden Single)
4. Row 5 / Column 5 → 5 (Hidden Single)
5. Row 9 / Column 6 → 6 (Hidden Single)
6. Row 1 / Column 1 → 5 (Hidden Single)
7. Row 2 / Column 5 → 1 (Hidden Single)
8. Row 3 / Column 3 → 1 (Hidden Single)
9. Row 6 / Column 7 → 5 (Hidden Single)
10. Row 4 / Column 2 → 5 (Hidden Single)
11. Row 7 / Column 9 → 5 (Hidden Single)
12. Row 3 / Column 1 → 9 (Hidden Single)
13. Locked Candidates Type 1 (Pointing): 4 in b4 => r17c3<>4
14. Locked Candidates Type 1 (Pointing): 4 in b1 => r2c6<>4
15. Row 1 / Column 6 → 4 (Hidden Single)
16. Locked Candidates Type 1 (Pointing): 3 in b5 => r2c6<>3
17. Row 2 / Column 2 → 3 (Hidden Single)
18. Row 1 / Column 3 → 7 (Naked Single)
19. Row 2 / Column 1 → 4 (Full House)
20. Row 5 / Column 2 → 7 (Naked Single)
21. Row 8 / Column 2 → 4 (Full House)
22. Row 7 / Column 3 → 8 (Naked Single)
23. Row 9 / Column 1 → 7 (Full House)
24. Row 5 / Column 1 → 8 (Full House)
25. Locked Candidates Type 1 (Pointing): 4 in b9 => r4c7<>4
26. X-Wing: 7 r37 c57 => r8c57<>7
27. Row 8 / Column 5 → 8 (Naked Single)
28. X-Wing: 8 r26 c68 => r4c68<>8
29. W-Wing: 3/7 in r3c7,r4c6 connected by 7 in r2c68 => r4c7<>3
30. Locked Candidates Type 1 (Pointing): 3 in b6 => r5c3<>3
31. Row 5 / Column 3 → 6 (Naked Single)
32. Row 5 / Column 8 → 1 (Naked Single)
33. Row 8 / Column 9 → 1 (Hidden Single)
34. Bivalue Universal Grave + 1 => r9c7<>4, r9c7<>8
35. Row 9 / Column 7 → 2 (Naked Single)
36. Row 5 / Column 7 → 3 (Naked Single)
37. Row 5 / Column 9 → 2 (Full House)
38. Row 8 / Column 7 → 6 (Naked Single)
39. Row 9 / Column 4 → 9 (Naked Single)
40. Row 9 / Column 9 → 8 (Naked Single)
41. Row 9 / Column 5 → 4 (Full House)
42. Row 1 / Column 9 → 3 (Full House)
43. Row 3 / Column 7 → 7 (Naked Single)
44. Row 2 / Column 8 → 8 (Full House)
45. Row 3 / Column 5 → 3 (Full House)
46. Row 2 / Column 6 → 7 (Full House)
47. Row 4 / Column 7 → 8 (Naked Single)
48. Row 7 / Column 7 → 4 (Full House)
49. Row 8 / Column 8 → 7 (Full House)
50. Row 7 / Column 5 → 7 (Full House)
51. Row 1 / Column 5 → 9 (Full House)
52. Row 1 / Column 4 → 8 (Full House)
53. Row 8 / Column 4 → 2 (Full House)
54. Row 4 / Column 4 → 7 (Full House)
55. Row 6 / Column 8 → 4 (Naked Single)
56. Row 4 / Column 8 → 6 (Full House)
57. Row 4 / Column 6 → 3 (Naked Single)
58. Row 4 / Column 3 → 4 (Full House)
59. Row 6 / Column 3 → 3 (Full House)
60. Row 6 / Column 6 → 8 (Full House)