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

This Sudoku Puzzle has 73 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Turbot Fish, undefined, Full House, Uniqueness Test 1 techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 3 / Column 5 → 5 (Hidden Single)
2. Row 8 / Column 2 → 5 (Hidden Single)
3. Row 7 / Column 9 → 5 (Hidden Single)
4. Row 3 / Column 1 → 8 (Hidden Single)
5. Row 1 / Column 5 → 8 (Hidden Single)
6. Row 4 / Column 4 → 5 (Hidden Single)
7. Row 5 / Column 3 → 5 (Hidden Single)
8. Row 8 / Column 1 → 1 (Hidden Single)
9. Row 7 / Column 7 → 1 (Hidden Single)
10. Row 9 / Column 2 → 8 (Hidden Single)
11. Row 9 / Column 9 → 6 (Naked Single)
12. Row 5 / Column 9 → 4 (Naked Single)
13. Row 8 / Column 8 → 8 (Hidden Single)
14. Row 5 / Column 4 → 9 (Hidden Single)
15. Row 4 / Column 9 → 8 (Hidden Single)
16. Row 7 / Column 3 → 6 (Hidden Single)
17. Row 4 / Column 7 → 9 (Hidden Single)
18. Row 5 / Column 5 → 3 (Hidden Single)
19. Row 8 / Column 5 → 2 (Naked Single)
20. Locked Candidates Type 1 (Pointing): 1 in b4 => r12c2<>1
21. Locked Candidates Type 1 (Pointing): 7 in b6 => r2c8<>7
22. Locked Candidates Type 2 (Claiming): 3 in r8 => r7c6<>3
23. Naked Pair: 1,7 in r3c39 => r3c6<>1, r3c6<>7
24. Locked Candidates Type 1 (Pointing): 1 in b2 => r2c3<>1
25. Turbot Fish: 2 r5c1 =2= r5c7 -2- r9c7 =2= r7c8 => r7c1<>2
26. W-Wing: 3/6 in r2c8,r8c4 connected by 6 in r1c47 => r2c4<>3
27. W-Wing: 6/3 in r2c8,r8c6 connected by 3 in r3c67 => r2c6<>6
28. Row 8 / Column 6 → 6 (Hidden Single)
29. Row 8 / Column 4 → 3 (Full House)
30. Uniqueness Test 1: 1/7 in r1c39,r3c39 => r1c3<>1, r1c3<>7
31. Row 1 / Column 3 → 2 (Naked Single)
32. Row 1 / Column 9 → 1 (Hidden Single)
33. Row 3 / Column 9 → 7 (Full House)
34. Row 3 / Column 3 → 1 (Naked Single)
35. Naked Pair: 7,9 in r9c35 => r9c1<>7
36. X-Wing: 2 r59 c17 => r4c1<>2
37. XY-Chain: 4 4- r6c4 -7- r6c8 -2- r7c8 -3- r7c1 -7- r7c6 -4 => r46c6<>4
38. 2-String Kite: 4 in r1c1,r6c4 (connected by r4c1,r6c2) => r1c4<>4
39. XY-Chain: 3 3- r3c6 -4- r7c6 -7- r7c1 -3- r7c8 -2- r9c7 -3 => r3c7<>3
40. Row 3 / Column 7 → 4 (Naked Single)
41. Row 3 / Column 6 → 3 (Full House)
42. Locked Candidates Type 1 (Pointing): 4 in b2 => r2c2<>4
43. XY-Chain: 7 7- r1c4 -6- r1c7 -3- r9c7 -2- r9c1 -3- r7c1 -7- r9c3 -9- r2c3 -7 => r1c1,r2c456<>7
44. Row 1 / Column 4 → 7 (Hidden Single)
45. Row 6 / Column 4 → 4 (Naked Single)
46. Row 2 / Column 4 → 6 (Full House)
47. Row 2 / Column 8 → 3 (Naked Single)
48. Row 1 / Column 7 → 6 (Full House)
49. Row 2 / Column 2 → 9 (Naked Single)
50. Row 7 / Column 8 → 2 (Naked Single)
51. Row 9 / Column 7 → 3 (Full House)
52. Row 5 / Column 7 → 2 (Full House)
53. Row 5 / Column 1 → 6 (Full House)
54. Row 2 / Column 3 → 7 (Naked Single)
55. Row 9 / Column 3 → 9 (Full House)
56. Row 6 / Column 8 → 7 (Naked Single)
57. Row 4 / Column 8 → 6 (Full House)
58. Row 7 / Column 2 → 3 (Naked Single)
59. Row 9 / Column 1 → 2 (Naked Single)
60. Row 9 / Column 5 → 7 (Full House)
61. Row 7 / Column 1 → 7 (Full House)
62. Row 4 / Column 1 → 4 (Naked Single)
63. Row 1 / Column 1 → 3 (Full House)
64. Row 1 / Column 2 → 4 (Full House)
65. Row 4 / Column 5 → 1 (Naked Single)
66. Row 7 / Column 6 → 4 (Naked Single)
67. Row 7 / Column 5 → 9 (Full House)
68. Row 2 / Column 5 → 4 (Full House)
69. Row 2 / Column 6 → 1 (Full House)
70. Row 4 / Column 2 → 2 (Naked Single)
71. Row 4 / Column 6 → 7 (Full House)
72. Row 6 / Column 6 → 2 (Full House)
73. Row 6 / Column 2 → 1 (Full House)