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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Empty Rectangle, undefined, Hidden Rectangle, Sashimi Swordfish, Naked Single, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 2 → 8 (Hidden Single)
2. Row 3 / Column 3 → 5 (Hidden Single)
3. Row 7 / Column 1 → 5 (Hidden Single)
4. Row 2 / Column 1 → 2 (Hidden Single)
5. Row 1 / Column 5 → 2 (Hidden Single)
6. Row 3 / Column 9 → 2 (Hidden Single)
7. Row 4 / Column 1 → 4 (Hidden Single)
8. Row 7 / Column 7 → 2 (Hidden Single)
9. Row 9 / Column 2 → 2 (Hidden Single)
10. Row 3 / Column 8 → 6 (Hidden Single)
11. Row 5 / Column 3 → 2 (Hidden Single)
12. Row 3 / Column 4 → 9 (Hidden Single)
13. Row 2 / Column 7 → 9 (Hidden Single)
14. Row 5 / Column 7 → 8 (Hidden Single)
15. Row 4 / Column 3 → 8 (Hidden Single)
16. Row 6 / Column 3 → 6 (Hidden Single)
17. Row 4 / Column 9 → 6 (Hidden Single)
18. Row 6 / Column 9 → 7 (Hidden Single)
19. Row 1 / Column 9 → 5 (Hidden Single)
20. Row 6 / Column 7 → 5 (Hidden Single)
21. Locked Candidates Type 1 (Pointing): 7 in b1 => r2c5<>7
22. Locked Candidates Type 1 (Pointing): 1 in b4 => r7c2<>1
23. Naked Pair: 1,3 in r5c28 => r5c456<>1, r5c456<>3
24. Naked Pair: 1,3 in r15c8 => r79c8<>1, r79c8<>3
25. Empty Rectangle: 1 in b9 (r2c59) => r8c5<>1
26. W-Wing: 3/1 in r6c5,r9c9 connected by 1 in r2c59 => r9c5<>3
27. Hidden Rectangle: 4/6 in r5c45,r7c45 => r7c5<>4
28. Finned X-Wing: 1 r29 c59 fr9c4 fr9c6 => r7c5<>1
29. Sashimi Swordfish: 1 r256 c258 fr2c9 => r1c8<>1
30. Row 1 / Column 8 → 3 (Naked Single)
31. Row 5 / Column 8 → 1 (Naked Single)
32. Row 4 / Column 7 → 3 (Full House)
33. Row 5 / Column 2 → 3 (Naked Single)
34. Row 3 / Column 2 → 4 (Naked Single)
35. Row 3 / Column 6 → 3 (Full House)
36. Row 6 / Column 1 → 9 (Naked Single)
37. Row 6 / Column 2 → 1 (Full House)
38. Row 8 / Column 1 → 3 (Full House)
39. Row 6 / Column 5 → 3 (Full House)
40. Row 2 / Column 2 → 7 (Naked Single)
41. Row 2 / Column 3 → 3 (Full House)
42. Row 7 / Column 2 → 9 (Full House)
43. Row 7 / Column 8 → 7 (Naked Single)
44. Row 9 / Column 8 → 9 (Full House)
45. Row 7 / Column 3 → 1 (Naked Single)
46. Row 8 / Column 3 → 7 (Full House)
47. Row 7 / Column 5 → 6 (Naked Single)
48. Row 7 / Column 6 → 4 (Naked Single)
49. Row 5 / Column 6 → 5 (Naked Single)
50. Row 8 / Column 5 → 9 (Naked Single)
51. Row 5 / Column 5 → 4 (Naked Single)
52. Row 5 / Column 4 → 6 (Full House)
53. Row 2 / Column 5 → 1 (Naked Single)
54. Row 2 / Column 9 → 4 (Full House)
55. Row 1 / Column 7 → 1 (Full House)
56. Row 8 / Column 7 → 4 (Full House)
57. Row 1 / Column 6 → 7 (Naked Single)
58. Row 1 / Column 4 → 4 (Full House)
59. Row 9 / Column 6 → 1 (Full House)
60. Row 4 / Column 5 → 7 (Naked Single)
61. Row 4 / Column 4 → 1 (Full House)
62. Row 9 / Column 5 → 5 (Full House)
63. Row 8 / Column 4 → 8 (Naked Single)
64. Row 8 / Column 9 → 1 (Full House)
65. Row 9 / Column 9 → 3 (Naked Single)
66. Row 7 / Column 9 → 8 (Full House)
67. Row 7 / Column 4 → 3 (Full House)
68. Row 9 / Column 4 → 7 (Full House)