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

This Sudoku Puzzle has 51 steps and it is solved using Locked Pair, Locked Triple, Naked Triple, Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Skyscraper techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Pair: 3,7 in r3c13 => r1c13,r3c79<>3
2. Locked Triple: 3,4,5 in r456c8 => r2c8,r56c7,r6c9<>3
3. Naked Triple: 1,6,9 in r356c7 => r89c7<>1
4. Row 8 / Column 6 → 1 (Hidden Single)
5. Row 5 / Column 6 → 3 (Naked Single)
6. Row 1 / Column 6 → 6 (Naked Single)
7. Row 1 / Column 4 → 3 (Full House)
8. Row 5 / Column 8 → 4 (Naked Single)
9. Row 7 / Column 4 → 6 (Hidden Single)
10. Row 4 / Column 4 → 4 (Hidden Single)
11. Row 4 / Column 1 → 9 (Hidden Single)
12. Locked Candidates Type 1 (Pointing): 2 in b8 => r7c3<>2
13. Locked Candidates Type 1 (Pointing): 2 in b7 => r9c7<>2
14. Locked Candidates Type 1 (Pointing): 1 in b9 => r6c9<>1
15. Skyscraper: 7 in r7c5,r9c2 (connected by r6c25) => r7c3<>7
16. Row 7 / Column 5 → 7 (Hidden Single)
17. Row 8 / Column 4 → 8 (Naked Single)
18. Row 7 / Column 6 → 2 (Full House)
19. Row 8 / Column 8 → 2 (Naked Single)
20. Row 8 / Column 7 → 7 (Full House)
21. Row 4 / Column 6 → 5 (Naked Single)
22. Row 6 / Column 6 → 8 (Full House)
23. Row 2 / Column 8 → 8 (Naked Single)
24. Row 9 / Column 7 → 3 (Naked Single)
25. Row 4 / Column 8 → 3 (Naked Single)
26. Row 6 / Column 8 → 5 (Full House)
27. Row 2 / Column 9 → 3 (Naked Single)
28. Row 2 / Column 7 → 2 (Full House)
29. Row 3 / Column 3 → 3 (Hidden Single)
30. Row 3 / Column 1 → 7 (Naked Single)
31. Row 5 / Column 1 → 1 (Naked Single)
32. Row 4 / Column 3 → 2 (Naked Single)
33. Row 4 / Column 5 → 1 (Full House)
34. Row 6 / Column 5 → 2 (Full House)
35. Row 5 / Column 7 → 9 (Naked Single)
36. Row 5 / Column 4 → 7 (Full House)
37. Row 6 / Column 4 → 9 (Full House)
38. Row 1 / Column 3 → 8 (Naked Single)
39. Row 1 / Column 1 → 2 (Full House)
40. Row 6 / Column 1 → 3 (Naked Single)
41. Row 6 / Column 2 → 7 (Full House)
42. Row 9 / Column 1 → 8 (Full House)
43. Row 9 / Column 2 → 2 (Full House)
44. Row 3 / Column 7 → 6 (Naked Single)
45. Row 3 / Column 9 → 9 (Full House)
46. Row 6 / Column 7 → 1 (Full House)
47. Row 6 / Column 9 → 6 (Full House)
48. Row 7 / Column 3 → 1 (Naked Single)
49. Row 7 / Column 9 → 8 (Full House)
50. Row 9 / Column 9 → 1 (Full House)
51. Row 9 / Column 3 → 7 (Full House)