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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 4 → 1 (Hidden Single)
2. Row 4 / Column 2 → 1 (Hidden Single)
3. Row 5 / Column 5 → 6 (Hidden Single)
4. Row 1 / Column 3 → 6 (Hidden Single)
5. Row 8 / Column 3 → 1 (Hidden Single)
6. Row 9 / Column 6 → 1 (Hidden Single)
7. Row 3 / Column 4 → 3 (Hidden Single)
8. Row 2 / Column 2 → 9 (Hidden Single)
9. Row 1 / Column 2 → 8 (Hidden Single)
10. Row 3 / Column 3 → 2 (Naked Single)
11. Row 8 / Column 2 → 5 (Naked Single)
12. Row 3 / Column 2 → 4 (Naked Single)
13. Row 7 / Column 2 → 3 (Naked Single)
14. Row 6 / Column 2 → 2 (Full House)
15. Row 7 / Column 1 → 8 (Full House)
16. Row 3 / Column 1 → 7 (Naked Single)
17. Row 3 / Column 5 → 9 (Naked Single)
18. Row 7 / Column 5 → 5 (Naked Single)
19. Row 9 / Column 5 → 4 (Naked Single)
20. Row 1 / Column 5 → 2 (Full House)
21. Row 7 / Column 9 → 1 (Hidden Single)
22. Row 1 / Column 4 → 7 (Hidden Single)
23. Row 1 / Column 6 → 4 (Full House)
24. Row 5 / Column 3 → 8 (Hidden Single)
25. Locked Candidates Type 1 (Pointing): 9 in b9 => r5c7<>9
26. Uniqueness Test 1: 3/5 in r2c13,r6c13 => r6c1<>3, r6c1<>5
27. XY-Chain: 7 7- r7c8 -6- r3c8 -8- r9c8 -5- r9c7 -9- r9c4 -8- r8c6 -7 => r7c6,r8c789<>7
28. Row 7 / Column 6 → 9 (Naked Single)
29. Row 6 / Column 6 → 3 (Naked Single)
30. Row 9 / Column 4 → 8 (Naked Single)
31. Row 8 / Column 6 → 7 (Full House)
32. Row 5 / Column 6 → 2 (Naked Single)
33. Row 4 / Column 6 → 8 (Full House)
34. Row 6 / Column 3 → 5 (Naked Single)
35. Row 2 / Column 3 → 3 (Full House)
36. Row 2 / Column 1 → 5 (Full House)
37. Row 9 / Column 8 → 5 (Naked Single)
38. Row 9 / Column 7 → 9 (Full House)
39. Row 6 / Column 9 → 7 (Hidden Single)
40. Row 5 / Column 1 → 3 (Hidden Single)
41. Row 4 / Column 8 → 3 (Hidden Single)
42. Row 6 / Column 4 → 9 (Hidden Single)
43. Row 5 / Column 9 → 9 (Hidden Single)
44. Row 4 / Column 7 → 2 (Hidden Single)
45. Row 8 / Column 7 → 4 (Naked Single)
46. Row 2 / Column 7 → 7 (Naked Single)
47. Row 2 / Column 8 → 4 (Full House)
48. Row 5 / Column 7 → 5 (Naked Single)
49. Row 7 / Column 7 → 6 (Full House)
50. Row 5 / Column 4 → 4 (Full House)
51. Row 7 / Column 8 → 7 (Full House)
52. Row 4 / Column 4 → 5 (Full House)
53. Row 8 / Column 9 → 8 (Naked Single)
54. Row 8 / Column 8 → 2 (Full House)
55. Row 6 / Column 8 → 6 (Naked Single)
56. Row 3 / Column 8 → 8 (Full House)
57. Row 3 / Column 9 → 6 (Full House)
58. Row 4 / Column 9 → 4 (Full House)
59. Row 6 / Column 1 → 4 (Full House)
60. Row 4 / Column 1 → 6 (Full House)