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

This Sudoku Puzzle has 77 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Hidden Rectangle, Naked Single, Uniqueness Test 1, Full House, Continuous Nice Loop, Skyscraper, Naked Pair, Naked Triple techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 5 → 9 (Hidden Single)
2. Row 9 / Column 4 → 2 (Hidden Single)
3. Row 4 / Column 1 → 1 (Hidden Single)
4. Locked Candidates Type 1 (Pointing): 5 in b4 => r5c479<>5
5. Row 6 / Column 7 → 5 (Hidden Single)
6. Row 6 / Column 8 → 1 (Hidden Single)
7. Row 5 / Column 7 → 3 (Hidden Single)
8. Locked Candidates Type 1 (Pointing): 4 in b5 => r4c2<>4
9. Locked Candidates Type 2 (Claiming): 3 in c5 => r3c6<>3
10. 2-String Kite: 2 in r3c9,r4c2 (connected by r4c8,r5c9) => r3c2<>2
11. Hidden Rectangle: 3/7 in r6c46,r8c46 => r8c6<>7
12. 2-String Kite: 7 in r5c3,r8c4 (connected by r8c2,r9c3) => r5c4<>7
13. Row 5 / Column 4 → 8 (Naked Single)
14. Row 4 / Column 4 → 5 (Naked Single)
15. Row 2 / Column 4 → 1 (Naked Single)
16. Row 4 / Column 8 → 8 (Hidden Single)
17. Row 2 / Column 6 → 5 (Hidden Single)
18. Row 7 / Column 5 → 1 (Hidden Single)
19. Row 8 / Column 9 → 1 (Hidden Single)
20. Row 4 / Column 2 → 2 (Hidden Single)
21. Locked Candidates Type 1 (Pointing): 7 in b5 => r6c2<>7
22. Row 6 / Column 2 → 6 (Naked Single)
23. Uniqueness Test 1: 3/7 in r6c46,r8c46 => r8c6<>3
24. Row 8 / Column 4 → 3 (Hidden Single)
25. Row 6 / Column 4 → 7 (Full House)
26. Row 6 / Column 6 → 3 (Full House)
27. Row 8 / Column 2 → 7 (Hidden Single)
28. Row 5 / Column 2 → 4 (Naked Single)
29. Row 5 / Column 1 → 5 (Naked Single)
30. Row 5 / Column 3 → 7 (Full House)
31. Locked Candidates Type 1 (Pointing): 9 in b7 => r3c1<>9
32. Hidden Rectangle: 5/6 in r7c39,r9c39 => r9c3<>6
33. Continuous Nice Loop: 2/4/6/9 9= r2c8 =2= r2c3 -2- r7c3 =2= r7c1 =9= r7c7 -9- r8c8 =9= r2c8 =2 => r3c3<>2, r2c8<>4, r2c8,r7c1<>6, r9c7<>9
34. XYZ-Wing: 1/4/6 in r1c38,r3c3 => r1c1<>4
35. Hidden Rectangle: 1/4 in r1c37,r3c37 => r1c7<>4
36. Finned X-Wing: 6 r27 c37 fr7c9 => r9c7<>6
37. XY-Chain: 4 4- r1c8 -6- r5c8 -2- r2c8 -9- r2c2 -8- r2c5 -4 => r1c5,r2c7<>4
38. Skyscraper: 4 in r1c3,r8c1 (connected by r18c8) => r3c1,r9c3<>4
39. Row 9 / Column 3 → 5 (Naked Single)
40. Row 7 / Column 9 → 5 (Hidden Single)
41. X-Wing: 6 r27 c37 => r1c37<>6
42. Naked Pair: 1,4 in r13c3 => r2c3<>4
43. Row 2 / Column 5 → 4 (Hidden Single)
44. Row 3 / Column 6 → 7 (Naked Single)
45. Row 4 / Column 5 → 6 (Naked Single)
46. Row 4 / Column 6 → 4 (Full House)
47. Row 9 / Column 5 → 7 (Naked Single)
48. Row 1 / Column 9 → 7 (Hidden Single)
49. Naked Triple: 2,3,8 in r3c159 => r3c27<>8
50. Row 3 / Column 2 → 9 (Naked Single)
51. Row 2 / Column 2 → 8 (Full House)
52. W-Wing: 2/6 in r2c3,r5c8 connected by 6 in r1c18 => r2c8<>2
53. Row 2 / Column 8 → 9 (Naked Single)
54. Row 2 / Column 7 → 6 (Naked Single)
55. Row 2 / Column 3 → 2 (Full House)
56. Row 1 / Column 8 → 4 (Naked Single)
57. Row 7 / Column 7 → 9 (Naked Single)
58. Row 3 / Column 1 → 3 (Naked Single)
59. Row 7 / Column 3 → 6 (Naked Single)
60. Row 7 / Column 1 → 2 (Full House)
61. Row 1 / Column 3 → 1 (Naked Single)
62. Row 3 / Column 3 → 4 (Full House)
63. Row 1 / Column 1 → 6 (Full House)
64. Row 3 / Column 7 → 1 (Naked Single)
65. Row 8 / Column 8 → 6 (Naked Single)
66. Row 5 / Column 8 → 2 (Full House)
67. Row 5 / Column 9 → 6 (Full House)
68. Row 3 / Column 5 → 8 (Naked Single)
69. Row 1 / Column 5 → 3 (Full House)
70. Row 1 / Column 7 → 8 (Full House)
71. Row 3 / Column 9 → 2 (Full House)
72. Row 9 / Column 9 → 8 (Full House)
73. Row 9 / Column 7 → 4 (Full House)
74. Row 8 / Column 6 → 9 (Naked Single)
75. Row 8 / Column 1 → 4 (Full House)
76. Row 9 / Column 1 → 9 (Full House)
77. Row 9 / Column 6 → 6 (Full House)