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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Uniqueness Test 4, AIC techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 6 / Column 4 → 2 (Naked Single)
2. Row 5 / Column 5 → 1 (Naked Single)
3. Row 8 / Column 4 → 6 (Naked Single)
4. Row 6 / Column 3 → 1 (Hidden Single)
5. Row 6 / Column 8 → 6 (Hidden Single)
6. Row 5 / Column 8 → 2 (Naked Single)
7. Row 4 / Column 8 → 4 (Full House)
8. Locked Candidates Type 1 (Pointing): 5 in b4 => r4c6<>5
9. Locked Candidates Type 1 (Pointing): 7 in b5 => r4c123<>7
10. Locked Candidates Type 1 (Pointing): 9 in b9 => r13c7<>9
11. Locked Candidates Type 2 (Claiming): 7 in c2 => r1c13,r23c3,r3c1<>7
12. X-Wing: 1 r19 c19 => r28c9,r7c1<>1
13. Row 8 / Column 9 → 2 (Naked Single)
14. Uniqueness Test 4: 6/7 in r5c13,r9c13 => r9c13<>6
15. Locked Candidates Type 1 (Pointing): 6 in b7 => r7c7<>6
16. XY-Chain: 7 7- r2c9 -6- r9c9 -1- r8c8 -8- r7c7 -9- r7c4 -3- r4c4 -7 => r2c4<>7
17. Row 4 / Column 4 → 7 (Hidden Single)
18. Row 4 / Column 6 → 3 (Naked Single)
19. XY-Chain: 9 9- r7c4 -3- r2c4 -9- r2c8 -1- r8c8 -8- r7c7 -9 => r7c5<>9
20. AIC: 8 8- r7c7 -9- r7c4 =9= r2c4 -9- r1c5 =9= r1c1 =1= r1c9 -1- r9c9 =1= r8c8 =8= r8c2 -8 => r7c123,r8c8<>8
21. Row 8 / Column 8 → 1 (Naked Single)
22. Row 2 / Column 8 → 9 (Naked Single)
23. Row 3 / Column 8 → 8 (Full House)
24. Row 8 / Column 6 → 5 (Naked Single)
25. Row 8 / Column 2 → 8 (Full House)
26. Row 9 / Column 9 → 6 (Naked Single)
27. Row 2 / Column 4 → 3 (Naked Single)
28. Row 7 / Column 4 → 9 (Full House)
29. Row 1 / Column 7 → 2 (Naked Single)
30. Row 6 / Column 6 → 4 (Naked Single)
31. Row 6 / Column 5 → 5 (Full House)
32. Row 2 / Column 9 → 7 (Naked Single)
33. Row 1 / Column 9 → 1 (Full House)
34. Row 3 / Column 7 → 6 (Full House)
35. Row 9 / Column 7 → 9 (Naked Single)
36. Row 7 / Column 7 → 8 (Full House)
37. Row 2 / Column 3 → 2 (Naked Single)
38. Row 9 / Column 5 → 2 (Naked Single)
39. Row 1 / Column 6 → 7 (Naked Single)
40. Row 2 / Column 2 → 1 (Naked Single)
41. Row 2 / Column 6 → 6 (Full House)
42. Row 3 / Column 1 → 9 (Naked Single)
43. Row 3 / Column 2 → 7 (Naked Single)
44. Row 9 / Column 3 → 7 (Naked Single)
45. Row 9 / Column 1 → 1 (Full House)
46. Row 7 / Column 5 → 3 (Naked Single)
47. Row 7 / Column 6 → 1 (Full House)
48. Row 3 / Column 6 → 2 (Full House)
49. Row 1 / Column 1 → 8 (Naked Single)
50. Row 3 / Column 5 → 4 (Naked Single)
51. Row 1 / Column 5 → 9 (Full House)
52. Row 1 / Column 3 → 4 (Full House)
53. Row 3 / Column 3 → 3 (Full House)
54. Row 5 / Column 3 → 6 (Naked Single)
55. Row 5 / Column 1 → 7 (Full House)
56. Row 4 / Column 1 → 2 (Naked Single)
57. Row 7 / Column 1 → 6 (Full House)
58. Row 7 / Column 3 → 5 (Naked Single)
59. Row 4 / Column 3 → 8 (Full House)
60. Row 4 / Column 2 → 5 (Full House)
61. Row 7 / Column 2 → 2 (Full House)