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

This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair, undefined, Naked Single, AIC, Discontinuous Nice Loop, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 8 → 2 (Hidden Single)
2. Row 4 / Column 4 → 6 (Hidden Single)
3. Row 7 / Column 2 → 6 (Hidden Single)
4. Row 8 / Column 7 → 6 (Hidden Single)
5. Row 7 / Column 8 → 7 (Hidden Single)
6. Row 7 / Column 4 → 9 (Hidden Single)
7. Locked Candidates Type 1 (Pointing): 8 in b7 => r8c45<>8
8. Locked Candidates Type 2 (Claiming): 5 in r7 => r8c45,r9c46<>5
9. Hidden Pair: 1,2 in r1c2,r2c3 => r1c2,r2c3<>7, r1c2,r2c3<>8
10. Hidden Pair: 3,9 in r56c9 => r56c9<>1, r56c9<>4, r56c9<>5, r6c9<>7
11. 2-String Kite: 2 in r1c2,r8c5 (connected by r1c6,r2c5) => r8c2<>2
12. X-Wing: 2 r28 c35 => r9c3<>2
13. Row 9 / Column 3 → 7 (Naked Single)
14. XY-Wing: 2/5/1 in r19c2,r9c8 => r1c8<>1
15. 2-String Kite: 1 in r5c8,r8c4 (connected by r8c9,r9c8) => r5c4<>1
16. Locked Candidates Type 1 (Pointing): 1 in b5 => r9c6<>1
17. AIC: 1/4 1- r1c9 =1= r1c2 =2= r9c2 =5= r9c8 =1= r5c8 =4= r4c9 -4 => r4c9<>1, r1c9<>4
18. Discontinuous Nice Loop: 5/7 r4c9 =4= r3c9 =6= r1c9 =1= r1c2 =2= r9c2 =5= r9c8 =1= r5c8 =4= r4c9 => r4c9<>5, r4c9<>7
19. Row 4 / Column 9 → 4 (Naked Single)
20. Row 6 / Column 3 → 4 (Hidden Single)
21. Row 8 / Column 5 → 4 (Hidden Single)
22. Row 8 / Column 4 → 1 (Naked Single)
23. Row 8 / Column 9 → 5 (Naked Single)
24. Row 9 / Column 8 → 1 (Full House)
25. Row 9 / Column 4 → 3 (Naked Single)
26. Row 9 / Column 6 → 2 (Naked Single)
27. Row 9 / Column 2 → 5 (Full House)
28. Row 8 / Column 3 → 2 (Hidden Single)
29. Row 2 / Column 3 → 1 (Naked Single)
30. Row 1 / Column 2 → 2 (Naked Single)
31. Row 2 / Column 9 → 7 (Naked Single)
32. Row 4 / Column 3 → 8 (Naked Single)
33. Row 3 / Column 3 → 9 (Full House)
34. Row 3 / Column 9 → 6 (Naked Single)
35. Row 4 / Column 5 → 5 (Naked Single)
36. Row 1 / Column 9 → 1 (Naked Single)
37. Row 4 / Column 1 → 7 (Naked Single)
38. Row 4 / Column 7 → 1 (Full House)
39. Row 7 / Column 5 → 8 (Naked Single)
40. Row 7 / Column 6 → 5 (Full House)
41. Row 6 / Column 5 → 3 (Naked Single)
42. Row 2 / Column 5 → 2 (Full House)
43. Row 6 / Column 9 → 9 (Naked Single)
44. Row 5 / Column 9 → 3 (Full House)
45. Row 6 / Column 1 → 5 (Naked Single)
46. Row 6 / Column 2 → 1 (Naked Single)
47. Row 5 / Column 2 → 9 (Full House)
48. Row 6 / Column 6 → 8 (Naked Single)
49. Row 6 / Column 7 → 7 (Full House)
50. Row 8 / Column 2 → 8 (Naked Single)
51. Row 3 / Column 2 → 7 (Full House)
52. Row 8 / Column 1 → 9 (Full House)
53. Row 1 / Column 6 → 4 (Naked Single)
54. Row 5 / Column 4 → 4 (Naked Single)
55. Row 5 / Column 6 → 1 (Full House)
56. Row 3 / Column 6 → 3 (Full House)
57. Row 1 / Column 8 → 8 (Naked Single)
58. Row 3 / Column 1 → 8 (Naked Single)
59. Row 1 / Column 1 → 6 (Naked Single)
60. Row 1 / Column 4 → 7 (Full House)
61. Row 2 / Column 1 → 3 (Full House)
62. Row 2 / Column 7 → 5 (Naked Single)
63. Row 2 / Column 4 → 8 (Full House)
64. Row 3 / Column 4 → 5 (Full House)
65. Row 3 / Column 8 → 4 (Full House)
66. Row 5 / Column 8 → 5 (Full House)
67. Row 5 / Column 7 → 8 (Full House)