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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, undefined, Swordfish techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 4 → 9 (Hidden Single)
2. Row 6 / Column 7 → 1 (Hidden Single)
3. Row 3 / Column 2 → 1 (Hidden Single)
4. Row 9 / Column 2 → 5 (Hidden Single)
5. Row 8 / Column 6 → 1 (Hidden Single)
6. Row 9 / Column 9 → 1 (Hidden Single)
7. Row 9 / Column 3 → 8 (Hidden Single)
8. Row 8 / Column 4 → 5 (Hidden Single)
9. Row 9 / Column 8 → 7 (Hidden Single)
10. Row 7 / Column 5 → 3 (Hidden Single)
11. Row 7 / Column 2 → 7 (Naked Single)
12. Row 1 / Column 2 → 8 (Naked Single)
13. Row 4 / Column 2 → 6 (Naked Single)
14. Row 6 / Column 2 → 3 (Full House)
15. Row 7 / Column 8 → 2 (Hidden Single)
16. Row 7 / Column 6 → 6 (Naked Single)
17. Locked Candidates Type 1 (Pointing): 9 in b9 => r1c7<>9
18. Naked Triple: 2,4,5 in r149c5 => r6c5<>2, r6c5<>4
19. X-Wing: 5 r25 c67 => r1c67<>5
20. X-Wing: 6 c58 r36 => r3c49<>6
21. Row 3 / Column 4 → 3 (Naked Single)
22. X-Wing: 7 r34 c39 => r2c39,r5c39<>7
23. Naked Triple: 2,4,6 in r5c349 => r5c16<>2, r5c17<>4, r5c7<>6
24. Swordfish: 4 r167 c178 => r4c8,r8c17<>4
25. Row 4 / Column 8 → 5 (Naked Single)
26. Row 5 / Column 7 → 7 (Naked Single)
27. Row 1 / Column 7 → 4 (Naked Single)
28. Row 5 / Column 1 → 8 (Naked Single)
29. Row 1 / Column 8 → 9 (Naked Single)
30. Row 7 / Column 7 → 9 (Naked Single)
31. Row 7 / Column 1 → 4 (Full House)
32. Row 5 / Column 6 → 5 (Naked Single)
33. Row 3 / Column 8 → 6 (Naked Single)
34. Row 6 / Column 8 → 4 (Full House)
35. Row 8 / Column 7 → 6 (Naked Single)
36. Row 2 / Column 7 → 5 (Full House)
37. Row 8 / Column 9 → 4 (Full House)
38. Row 6 / Column 1 → 2 (Naked Single)
39. Row 2 / Column 9 → 8 (Naked Single)
40. Row 3 / Column 9 → 7 (Full House)
41. Row 3 / Column 5 → 8 (Naked Single)
42. Row 3 / Column 3 → 9 (Full House)
43. Row 4 / Column 9 → 2 (Naked Single)
44. Row 5 / Column 9 → 6 (Full House)
45. Row 1 / Column 1 → 7 (Naked Single)
46. Row 5 / Column 3 → 4 (Naked Single)
47. Row 4 / Column 3 → 7 (Full House)
48. Row 4 / Column 5 → 4 (Full House)
49. Row 5 / Column 4 → 2 (Full House)
50. Row 6 / Column 6 → 8 (Naked Single)
51. Row 6 / Column 5 → 6 (Full House)
52. Row 8 / Column 3 → 3 (Naked Single)
53. Row 2 / Column 3 → 2 (Full House)
54. Row 2 / Column 1 → 3 (Full House)
55. Row 8 / Column 1 → 9 (Full House)
56. Row 1 / Column 6 → 2 (Naked Single)
57. Row 2 / Column 6 → 7 (Full House)
58. Row 2 / Column 4 → 6 (Full House)
59. Row 9 / Column 4 → 4 (Full House)
60. Row 9 / Column 5 → 2 (Full House)
61. Row 1 / Column 5 → 5 (Full House)