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

This Sudoku Puzzle has 91 steps and it is solved using Locked Candidates Type 1 (Pointing), Skyscraper, Discontinuous Nice Loop, Grouped AIC, Hidden Single, AIC, undefined, Empty Rectangle, Sue de Coq, Hidden Pair, Naked Triple, Naked Single, Full House, Locked Candidates Type 2 (Claiming) techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Candidates Type 1 (Pointing): 2 in b4 => r5c89<>2
2. Locked Candidates Type 1 (Pointing): 1 in b6 => r5c12<>1
3. Skyscraper: 9 in r2c3,r6c2 (connected by r26c5) => r3c2,r5c3<>9
4. Discontinuous Nice Loop: 3 r1c5 -3- r1c3 =3= r2c3 =9= r2c5 -9- r6c5 -7- r4c5 -3- r1c5 => r1c5<>3
5. Discontinuous Nice Loop: 6 r9c6 -6- r2c6 =6= r2c3 =9= r2c5 -9- r6c5 -7- r6c9 -2- r6c8 =2= r3c8 -2- r3c6 =2= r9c6 => r9c6<>6
6. Grouped AIC: 3 3- r1c3 =3= r2c3 =9= r2c5 -9- r6c5 -7- r6c9 -2- r1c9 =2= r1c5 =1= r1c79 -1- r2c9 -3 => r1c79,r2c3<>3
7. Row 1 / Column 3 → 3 (Hidden Single)
8. AIC: 5 5- r1c4 -6- r2c6 =6= r2c3 =9= r2c5 -9- r6c5 =9= r5c4 =5= r5c6 -5 => r3c6,r5c4<>5
9. Row 5 / Column 6 → 5 (Hidden Single)
10. Discontinuous Nice Loop: 5 r1c5 -5- r1c4 -6- r2c6 =6= r2c3 =9= r2c5 -9- r6c5 -7- r6c9 -2- r1c9 =2= r1c5 => r1c5<>5
11. Finned X-Wing: 5 r18 c47 fr8c5 => r7c4<>5
12. Discontinuous Nice Loop: 3 r2c6 -3- r3c6 -2- r3c8 =2= r6c8 -2- r6c9 -7- r6c5 -9- r2c5 =9= r2c3 =6= r2c6 => r2c6<>3
13. Empty Rectangle: 3 in b2 (r4c58) => r3c8<>3
14. Discontinuous Nice Loop: 3 r3c4 -3- r3c6 -2- r3c8 =2= r6c8 -2- r6c9 -7- r6c5 -9- r5c4 =9= r3c4 => r3c4<>3
15. 2-String Kite: 3 in r4c8,r7c4 (connected by r4c5,r5c4) => r7c8<>3
16. Sue de Coq: r2c56 - {13689} (r2c79 - {138}, r13c4 - {569}) => r3c5<>5, r3c5<>9, r2c3<>8
17. Row 5 / Column 3 → 8 (Hidden Single)
18. Row 5 / Column 1 → 2 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 5 in b2 => r8c4<>5
20. Locked Candidates Type 1 (Pointing): 9 in b4 => r79c2<>9
21. Hidden Pair: 2,8 in r36c8 => r3c8<>4, r3c8<>5, r6c8<>6
22. Locked Candidates Type 1 (Pointing): 5 in b3 => r89c7<>5
23. Row 8 / Column 5 → 5 (Hidden Single)
24. Row 8 / Column 3 → 2 (Hidden Single)
25. Naked Triple: 2,3,8 in r3c568 => r3c27<>8, r3c7<>3
26. Row 1 / Column 2 → 8 (Hidden Single)
27. Locked Candidates Type 1 (Pointing): 3 in b3 => r2c5<>3
28. Empty Rectangle: 4 in b1 (r8c17) => r3c7<>4
29. Row 3 / Column 7 → 5 (Naked Single)
30. Row 3 / Column 4 → 9 (Naked Single)
31. Row 1 / Column 4 → 5 (Hidden Single)
32. Row 2 / Column 3 → 9 (Hidden Single)
33. Row 6 / Column 5 → 9 (Hidden Single)
34. Row 9 / Column 1 → 9 (Hidden Single)
35. Row 5 / Column 2 → 9 (Hidden Single)
36. Row 1 / Column 1 → 6 (Hidden Single)
37. Row 2 / Column 6 → 6 (Hidden Single)
38. Row 7 / Column 9 → 9 (Hidden Single)
39. Row 4 / Column 1 → 1 (Hidden Single)
40. Locked Candidates Type 1 (Pointing): 1 in b2 => r79c5<>1
41. Locked Candidates Type 1 (Pointing): 4 in b4 => r4c8<>4
42. Locked Candidates Type 1 (Pointing): 3 in b9 => r9c56<>3
43. Naked Triple: 4,6,7 in r79c3,r8c1 => r79c2<>4, r79c2<>6, r79c2<>7
44. Locked Candidates Type 1 (Pointing): 6 in b7 => r4c3<>6
45. AIC: 1/5 5- r7c2 -1- r7c6 -3- r7c4 =3= r5c4 -3- r4c5 =3= r4c8 =6= r6c7 =8= r6c8 =2= r3c8 -2- r3c6 =2= r9c6 =1= r9c2 -1 => r7c2<>1, r9c2<>5
46. Row 7 / Column 2 → 5 (Naked Single)
47. Row 9 / Column 2 → 1 (Naked Single)
48. Row 9 / Column 6 → 2 (Naked Single)
49. Row 3 / Column 6 → 3 (Naked Single)
50. Row 7 / Column 6 → 1 (Full House)
51. Row 9 / Column 8 → 5 (Hidden Single)
52. Locked Candidates Type 2 (Claiming): 3 in c8 => r5c79<>3
53. XY-Chain: 4 4- r7c8 -6- r4c8 -3- r4c5 -7- r9c5 -4 => r7c5,r9c79<>4
54. Row 9 / Column 5 → 4 (Hidden Single)
55. Sue de Coq: r12c9 - {1234} (r69c9 - {237}, r1c7 - {14}) => r2c7<>1, r5c9<>7
56. XY-Chain: 6 6- r7c8 -4- r5c8 -3- r5c4 -7- r8c4 -6 => r7c4,r8c7<>6
57. Row 8 / Column 4 → 6 (Hidden Single)
58. Locked Candidates Type 1 (Pointing): 7 in b8 => r7c3<>7
59. Naked Triple: 1,4,7 in r158c7 => r69c7<>7
60. Skyscraper: 7 in r6c2,r9c3 (connected by r69c9) => r4c3<>7
61. Row 4 / Column 3 → 4 (Naked Single)
62. Row 7 / Column 3 → 6 (Naked Single)
63. Row 9 / Column 3 → 7 (Full House)
64. Row 8 / Column 1 → 4 (Full House)
65. Row 3 / Column 1 → 7 (Full House)
66. Row 8 / Column 7 → 7 (Full House)
67. Row 3 / Column 2 → 4 (Full House)
68. Row 7 / Column 8 → 4 (Naked Single)
69. Row 9 / Column 9 → 3 (Naked Single)
70. Row 9 / Column 7 → 6 (Full House)
71. Row 5 / Column 8 → 3 (Naked Single)
72. Row 2 / Column 9 → 1 (Naked Single)
73. Row 6 / Column 7 → 8 (Naked Single)
74. Row 4 / Column 8 → 6 (Naked Single)
75. Row 5 / Column 4 → 7 (Naked Single)
76. Row 4 / Column 5 → 3 (Full House)
77. Row 4 / Column 2 → 7 (Full House)
78. Row 7 / Column 4 → 3 (Full House)
79. Row 7 / Column 5 → 7 (Full House)
80. Row 6 / Column 2 → 6 (Full House)
81. Row 1 / Column 7 → 4 (Naked Single)
82. Row 2 / Column 5 → 8 (Naked Single)
83. Row 2 / Column 7 → 3 (Full House)
84. Row 5 / Column 7 → 1 (Full House)
85. Row 5 / Column 9 → 4 (Full House)
86. Row 6 / Column 8 → 2 (Naked Single)
87. Row 3 / Column 8 → 8 (Full House)
88. Row 1 / Column 9 → 2 (Full House)
89. Row 3 / Column 5 → 2 (Full House)
90. Row 6 / Column 9 → 7 (Full House)
91. Row 1 / Column 5 → 1 (Full House)
Show More...