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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 6 → 9 (Hidden Single)
2. Row 6 / Column 1 → 3 (Hidden Single)
3. Row 9 / Column 9 → 4 (Hidden Single)
4. Row 1 / Column 4 → 3 (Hidden Single)
5. Row 5 / Column 2 → 1 (Hidden Single)
6. Row 9 / Column 6 → 3 (Hidden Single)
7. Row 4 / Column 2 → 4 (Hidden Single)
8. Row 5 / Column 5 → 3 (Hidden Single)
9. Row 6 / Column 7 → 4 (Hidden Single)
10. Row 5 / Column 6 → 4 (Hidden Single)
11. Row 3 / Column 5 → 4 (Hidden Single)
12. Row 3 / Column 8 → 1 (Hidden Single)
13. Row 2 / Column 5 → 1 (Hidden Single)
14. Row 1 / Column 1 → 1 (Hidden Single)
15. Row 6 / Column 9 → 1 (Hidden Single)
16. Row 6 / Column 3 → 7 (Hidden Single)
17. Row 4 / Column 9 → 7 (Hidden Single)
18. Row 2 / Column 1 → 7 (Hidden Single)
19. Row 5 / Column 4 → 7 (Hidden Single)
20. Row 7 / Column 6 → 7 (Hidden Single)
21. Row 9 / Column 2 → 7 (Hidden Single)
22. Locked Candidates Type 1 (Pointing): 8 in b2 => r79c4<>8
23. Locked Candidates Type 1 (Pointing): 9 in b7 => r8c7<>9
24. Locked Pair: 5,6 in r8c79 => r7c789,r8c135,r9c8<>5, r7c789,r8c35,r9c8<>6
25. Row 7 / Column 9 → 3 (Naked Single)
26. Row 7 / Column 7 → 9 (Naked Single)
27. Row 2 / Column 7 → 3 (Hidden Single)
28. Row 5 / Column 8 → 9 (Hidden Single)
29. Row 5 / Column 3 → 5 (Full House)
30. Row 9 / Column 1 → 5 (Hidden Single)
31. Uniqueness Test 1: 8/9 in r4c13,r8c13 => r8c3<>8, r8c3<>9
32. Row 8 / Column 3 → 2 (Naked Single)
33. Row 8 / Column 5 → 8 (Naked Single)
34. Row 8 / Column 1 → 9 (Naked Single)
35. Row 4 / Column 1 → 8 (Full House)
36. Row 4 / Column 3 → 9 (Full House)
37. Finned Swordfish: 5 c679 r248 fr3c6 => r2c4<>5
38. Finned Swordfish: 6 c679 r248 fr3c6 => r2c4<>6
39. W-Wing: 2/8 in r2c4,r9c8 connected by 8 in r29c3 => r9c4<>2
40. Row 9 / Column 4 → 6 (Naked Single)
41. Row 9 / Column 3 → 8 (Naked Single)
42. Row 2 / Column 3 → 6 (Full House)
43. Row 7 / Column 2 → 6 (Full House)
44. Row 9 / Column 8 → 2 (Full House)
45. Row 1 / Column 2 → 5 (Naked Single)
46. Row 1 / Column 8 → 6 (Full House)
47. Row 2 / Column 9 → 5 (Full House)
48. Row 3 / Column 2 → 8 (Full House)
49. Row 8 / Column 9 → 6 (Full House)
50. Row 8 / Column 7 → 5 (Full House)
51. Row 7 / Column 8 → 8 (Full House)
52. Row 6 / Column 8 → 5 (Full House)
53. Row 4 / Column 7 → 6 (Full House)
54. Row 6 / Column 5 → 6 (Full House)
55. Row 2 / Column 6 → 2 (Naked Single)
56. Row 2 / Column 4 → 8 (Full House)
57. Row 3 / Column 4 → 5 (Naked Single)
58. Row 3 / Column 6 → 6 (Full House)
59. Row 4 / Column 6 → 5 (Full House)
60. Row 7 / Column 4 → 2 (Full House)
61. Row 4 / Column 5 → 2 (Full House)
62. Row 7 / Column 5 → 5 (Full House)