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

This Sudoku Puzzle has 69 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair, Empty Rectangle, Continuous Nice Loop, Naked Pair, Naked Triple, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

1. Row 1 / Column 4 → 8 (Hidden Single)
2. Row 5 / Column 8 → 8 (Hidden Single)
3. Row 4 / Column 5 → 5 (Hidden Single)
4. Row 2 / Column 9 → 5 (Hidden Single)
5. Row 3 / Column 8 → 9 (Hidden Single)
6. Row 4 / Column 4 → 7 (Hidden Single)
7. Row 9 / Column 5 → 7 (Hidden Single)
8. Row 9 / Column 3 → 8 (Hidden Single)
9. Row 8 / Column 5 → 8 (Hidden Single)
10. Row 6 / Column 1 → 8 (Hidden Single)
11. Row 7 / Column 7 → 8 (Hidden Single)
12. Row 8 / Column 1 → 6 (Hidden Single)
13. Row 2 / Column 5 → 6 (Hidden Single)
14. Row 7 / Column 8 → 2 (Hidden Single)
15. Row 1 / Column 8 → 4 (Naked Single)
16. Row 9 / Column 8 → 6 (Full House)
17. Row 4 / Column 2 → 6 (Hidden Single)
18. Row 3 / Column 5 → 3 (Hidden Single)
19. Row 7 / Column 4 → 6 (Hidden Single)
20. Locked Candidates Type 1 (Pointing): 2 in b2 => r5c4<>2
21. Locked Candidates Type 1 (Pointing): 2 in b3 => r46c7<>2
22. Locked Candidates Type 1 (Pointing): 3 in b3 => r8c7<>3
23. Row 8 / Column 9 → 3 (Hidden Single)
24. Locked Candidates Type 1 (Pointing): 4 in b5 => r5c2<>4
25. Locked Candidates Type 2 (Claiming): 1 in c5 => r5c46<>1
26. Hidden Pair: 5,7 in r17c3 => r17c3<>1, r1c3<>2
27. Empty Rectangle: 4 in b4 (r8c37) => r4c7<>4
28. Continuous Nice Loop: 1/2 5= r3c2 =4= r9c2 =3= r9c6 =9= r5c6 =4= r3c6 =5= r3c2 =4 => r3c26,r9c26<>1, r3c2<>2
29. Naked Pair: 4,5 in r3c26 => r3c14<>4
30. Naked Triple: 1,3,7 in r137c1 => r2c1<>3, r4c1<>1
31. Row 2 / Column 7 → 3 (Hidden Single)
32. 2-String Kite: 1 in r3c1,r7c6 (connected by r1c6,r3c4) => r7c1<>1
33. Locked Candidates Type 2 (Claiming): 1 in c1 => r1c2<>1
34. XY-Wing: 5/7/1 in r1c36,r3c1 => r1c1,r3c4<>1
35. Row 3 / Column 4 → 2 (Naked Single)
36. Row 2 / Column 4 → 4 (Naked Single)
37. Row 3 / Column 7 → 7 (Naked Single)
38. Row 1 / Column 7 → 2 (Full House)
39. Row 2 / Column 1 → 9 (Naked Single)
40. Row 2 / Column 3 → 2 (Full House)
41. Row 3 / Column 6 → 5 (Naked Single)
42. Row 1 / Column 6 → 1 (Full House)
43. Row 5 / Column 4 → 9 (Naked Single)
44. Row 9 / Column 4 → 1 (Full House)
45. Row 3 / Column 1 → 1 (Naked Single)
46. Row 3 / Column 2 → 4 (Full House)
47. Row 4 / Column 1 → 4 (Naked Single)
48. Row 7 / Column 6 → 3 (Naked Single)
49. Row 9 / Column 6 → 9 (Full House)
50. Row 5 / Column 6 → 4 (Full House)
51. Row 9 / Column 9 → 4 (Naked Single)
52. Row 9 / Column 2 → 3 (Full House)
53. Row 8 / Column 7 → 1 (Full House)
54. Row 8 / Column 3 → 4 (Full House)
55. Row 7 / Column 1 → 7 (Naked Single)
56. Row 1 / Column 1 → 3 (Full House)
57. Row 1 / Column 2 → 5 (Naked Single)
58. Row 1 / Column 3 → 7 (Full House)
59. Row 4 / Column 7 → 9 (Naked Single)
60. Row 6 / Column 7 → 4 (Full House)
61. Row 7 / Column 3 → 5 (Naked Single)
62. Row 7 / Column 2 → 1 (Full House)
63. Row 5 / Column 2 → 2 (Full House)
64. Row 5 / Column 5 → 1 (Full House)
65. Row 6 / Column 5 → 2 (Full House)
66. Row 4 / Column 3 → 1 (Naked Single)
67. Row 4 / Column 9 → 2 (Full House)
68. Row 6 / Column 9 → 1 (Full House)
69. Row 6 / Column 3 → 9 (Full House)