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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Full House, Naked Pair, Naked Triple, undefined techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 3 / Column 8 → 4 (Hidden Single)
2. Row 4 / Column 8 → 1 (Naked Single)
3. Row 4 / Column 7 → 4 (Naked Single)
4. Row 2 / Column 4 → 4 (Hidden Single)
5. Row 9 / Column 1 → 4 (Hidden Single)
6. Row 8 / Column 8 → 2 (Hidden Single)
7. Row 3 / Column 9 → 7 (Hidden Single)
8. Row 8 / Column 1 → 9 (Hidden Single)
9. Row 3 / Column 5 → 1 (Hidden Single)
10. Row 8 / Column 2 → 7 (Hidden Single)
11. Locked Candidates Type 1 (Pointing): 2 in b1 => r2c5<>2
12. Row 1 / Column 5 → 2 (Hidden Single)
13. Row 1 / Column 4 → 3 (Naked Single)
14. Row 2 / Column 5 → 6 (Full House)
15. Row 2 / Column 7 → 3 (Hidden Single)
16. Row 2 / Column 9 → 1 (Hidden Single)
17. Row 8 / Column 9 → 5 (Naked Single)
18. Row 1 / Column 9 → 6 (Naked Single)
19. Row 1 / Column 7 → 5 (Full House)
20. Row 5 / Column 9 → 9 (Full House)
21. Row 2 / Column 8 → 9 (Full House)
22. Row 5 / Column 7 → 6 (Naked Single)
23. Row 6 / Column 8 → 5 (Full House)
24. Row 7 / Column 6 → 5 (Hidden Single)
25. Locked Candidates Type 1 (Pointing): 3 in b5 => r6c123<>3
26. Locked Candidates Type 1 (Pointing): 7 in b5 => r79c4<>7
27. Locked Candidates Type 1 (Pointing): 6 in b7 => r6c2<>6
28. Naked Pair: 8,9 in r7c47 => r7c2<>8, r7c5<>9
29. Naked Triple: 1,8,9 in r679c4 => r5c4<>1
30. XY-Chain: 1 1- r5c6 -4- r5c3 -2- r4c2 -3- r7c2 -6- r9c2 -8- r6c2 -1 => r5c2,r6c46<>1
31. Row 6 / Column 4 → 9 (Naked Single)
32. Row 6 / Column 5 → 3 (Naked Single)
33. Row 7 / Column 4 → 8 (Naked Single)
34. Row 6 / Column 6 → 4 (Naked Single)
35. Row 7 / Column 5 → 7 (Naked Single)
36. Row 9 / Column 5 → 9 (Full House)
37. Row 7 / Column 7 → 9 (Naked Single)
38. Row 9 / Column 4 → 1 (Naked Single)
39. Row 8 / Column 6 → 3 (Full House)
40. Row 5 / Column 6 → 1 (Full House)
41. Row 7 / Column 8 → 6 (Naked Single)
42. Row 7 / Column 2 → 3 (Full House)
43. Row 9 / Column 8 → 7 (Full House)
44. Row 9 / Column 7 → 8 (Naked Single)
45. Row 8 / Column 7 → 1 (Full House)
46. Row 8 / Column 3 → 8 (Full House)
47. Row 9 / Column 2 → 6 (Full House)
48. Row 4 / Column 2 → 2 (Naked Single)
49. Row 2 / Column 3 → 2 (Naked Single)
50. Row 6 / Column 3 → 6 (Naked Single)
51. Row 4 / Column 4 → 7 (Naked Single)
52. Row 4 / Column 1 → 3 (Full House)
53. Row 5 / Column 4 → 2 (Full House)
54. Row 5 / Column 2 → 5 (Naked Single)
55. Row 5 / Column 3 → 4 (Naked Single)
56. Row 3 / Column 3 → 3 (Full House)
57. Row 3 / Column 1 → 6 (Full House)
58. Row 5 / Column 1 → 7 (Full House)
59. Row 6 / Column 1 → 8 (Naked Single)
60. Row 2 / Column 1 → 5 (Full House)
61. Row 2 / Column 2 → 8 (Full House)
62. Row 6 / Column 2 → 1 (Full House)