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

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

Try To Solve This Puzzle

## Solution Steps:

1. Locked Pair: 2,4 in r13c5 => r2c46,r459c5<>2, r2c4,r9c5<>4
2. Row 4 / Column 5 → 3 (Naked Single)
3. Row 8 / Column 4 → 4 (Hidden Single)
4. Row 5 / Column 2 → 3 (Hidden Single)
5. Row 9 / Column 6 → 3 (Hidden Single)
6. Row 8 / Column 6 → 7 (Hidden Single)
7. Row 2 / Column 6 → 6 (Naked Single)
8. Row 9 / Column 5 → 1 (Naked Single)
9. Row 7 / Column 6 → 2 (Full House)
10. Row 2 / Column 4 → 7 (Naked Single)
11. Row 5 / Column 5 → 7 (Naked Single)
12. Row 4 / Column 6 → 8 (Naked Single)
13. Row 6 / Column 6 → 1 (Full House)
14. Row 6 / Column 1 → 7 (Hidden Single)
15. Row 9 / Column 3 → 7 (Hidden Single)
16. Row 6 / Column 2 → 8 (Hidden Single)
17. Row 4 / Column 2 → 4 (Hidden Single)
18. Locked Candidates Type 1 (Pointing): 1 in b1 => r2c78<>1
19. Locked Candidates Type 1 (Pointing): 2 in b4 => r5c4789<>2
20. Naked Pair: 2,4 in r1c35 => r1c79<>2, r1c79<>4
21. Naked Triple: 2,4,6 in r349c7 => r2c7<>2, r2c7<>4, r5c7<>6
22. Row 2 / Column 7 → 9 (Naked Single)
23. 2-String Kite: 4 in r2c1,r9c7 (connected by r2c8,r3c7) => r9c1<>4
24. Row 9 / Column 1 → 2 (Naked Single)
25. Row 5 / Column 1 → 5 (Naked Single)
26. Row 5 / Column 3 → 2 (Full House)
27. Row 8 / Column 2 → 1 (Naked Single)
28. Row 2 / Column 2 → 2 (Full House)
29. Row 8 / Column 8 → 2 (Full House)
30. Row 1 / Column 3 → 4 (Naked Single)
31. Row 2 / Column 1 → 1 (Full House)
32. Row 7 / Column 1 → 4 (Full House)
33. Row 2 / Column 8 → 4 (Full House)
34. Row 7 / Column 3 → 5 (Full House)
35. Row 7 / Column 9 → 1 (Full House)
36. Row 1 / Column 5 → 2 (Naked Single)
37. Row 3 / Column 5 → 4 (Full House)
38. Row 3 / Column 7 → 2 (Full House)
39. Row 6 / Column 8 → 9 (Naked Single)
40. Row 5 / Column 8 → 1 (Full House)
41. Row 1 / Column 9 → 8 (Naked Single)
42. Row 1 / Column 7 → 1 (Full House)
43. Row 4 / Column 7 → 6 (Naked Single)
44. Row 4 / Column 4 → 2 (Full House)
45. Row 6 / Column 4 → 2 (Naked Single)
46. Row 5 / Column 7 → 8 (Naked Single)
47. Row 9 / Column 7 → 4 (Full House)
48. Row 9 / Column 9 → 6 (Full House)
49. Row 5 / Column 9 → 6 (Naked Single)
50. Row 6 / Column 9 → 4 (Naked Single)
51. Row 5 / Column 4 → 9 (Naked Single)