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

This Sudoku Puzzle has 65 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), undefined, Hidden Rectangle techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 1 / Column 6 → 5 (Naked Single)
2. Row 3 / Column 6 → 8 (Naked Single)
3. Row 2 / Column 6 → 6 (Naked Single)
4. Row 8 / Column 6 → 1 (Naked Single)
5. Row 5 / Column 6 → 7 (Full House)
6. Row 7 / Column 8 → 7 (Hidden Single)
7. Row 9 / Column 9 → 1 (Naked Single)
8. Row 9 / Column 7 → 5 (Naked Single)
9. Row 9 / Column 8 → 6 (Naked Single)
10. Row 9 / Column 5 → 7 (Hidden Single)
11. Row 2 / Column 1 → 8 (Hidden Single)
12. Row 9 / Column 1 → 9 (Naked Single)
13. Row 9 / Column 3 → 8 (Full House)
14. Row 2 / Column 9 → 7 (Hidden Single)
15. Row 3 / Column 8 → 1 (Hidden Single)
16. Row 2 / Column 8 → 5 (Hidden Single)
17. Row 1 / Column 9 → 4 (Hidden Single)
18. Row 2 / Column 5 → 4 (Hidden Single)
19. Locked Pair: 2,3 in r4c89 => r4c137,r5c7<>2, r4c13457,r5c7,r6c8<>3
20. Row 6 / Column 8 → 4 (Naked Single)
21. Locked Candidates Type 1 (Pointing): 3 in b2 => r56c5<>3
22. X-Wing: 2 r27 c47 => r18c7,r8c4<>2
23. Hidden Rectangle: 7/9 in r1c23,r4c23 => r4c3<>9
24. 2-String Kite: 9 in r3c5,r6c3 (connected by r1c3,r3c2) => r6c5<>9
25. XY-Chain: 9 9- r1c7 -3- r3c9 -2- r3c1 -5- r3c2 -9 => r1c23<>9
26. Row 1 / Column 2 → 7 (Naked Single)
27. Row 1 / Column 3 → 2 (Naked Single)
28. Row 3 / Column 1 → 5 (Naked Single)
29. Row 3 / Column 2 → 9 (Full House)
30. Row 4 / Column 1 → 1 (Naked Single)
31. Row 4 / Column 7 → 8 (Naked Single)
32. Row 6 / Column 1 → 3 (Naked Single)
33. Row 5 / Column 7 → 1 (Naked Single)
34. Row 5 / Column 3 → 5 (Naked Single)
35. Row 7 / Column 1 → 4 (Naked Single)
36. Row 5 / Column 1 → 2 (Full House)
37. Row 4 / Column 2 → 6 (Naked Single)
38. Row 5 / Column 5 → 8 (Naked Single)
39. Row 7 / Column 3 → 3 (Naked Single)
40. Row 4 / Column 3 → 7 (Naked Single)
41. Row 6 / Column 2 → 8 (Naked Single)
42. Row 6 / Column 3 → 9 (Naked Single)
43. Row 5 / Column 2 → 4 (Full House)
44. Row 5 / Column 4 → 3 (Full House)
45. Row 8 / Column 3 → 6 (Full House)
46. Row 8 / Column 2 → 5 (Naked Single)
47. Row 7 / Column 2 → 1 (Full House)
48. Row 6 / Column 5 → 1 (Naked Single)
49. Row 6 / Column 4 → 6 (Full House)
50. Row 7 / Column 7 → 2 (Naked Single)
51. Row 7 / Column 4 → 5 (Full House)
52. Row 8 / Column 4 → 8 (Naked Single)
53. Row 8 / Column 5 → 2 (Full House)
54. Row 2 / Column 7 → 9 (Naked Single)
55. Row 2 / Column 4 → 2 (Full House)
56. Row 4 / Column 4 → 9 (Full House)
57. Row 4 / Column 5 → 5 (Full House)
58. Row 8 / Column 8 → 3 (Naked Single)
59. Row 4 / Column 8 → 2 (Full House)
60. Row 8 / Column 7 → 4 (Full House)
61. Row 1 / Column 7 → 3 (Full House)
62. Row 4 / Column 9 → 3 (Full House)
63. Row 1 / Column 5 → 9 (Full House)
64. Row 3 / Column 5 → 3 (Full House)
65. Row 3 / Column 9 → 2 (Full House)