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

This Sudoku Puzzle has 90 steps and it is solved using Locked Candidates Type 1 (Pointing), undefined, Naked Pair, Naked Single, Discontinuous Nice Loop, Locked Candidates Type 2 (Claiming), AIC, Hidden Single, Continuous Nice Loop, Finned Swordfish, Multi Colors 1, Skyscraper, Hidden Pair, Locked Pair, Uniqueness Test 2, Naked Triple, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Candidates Type 1 (Pointing): 6 in b1 => r1c8<>6
2. Locked Candidates Type 1 (Pointing): 3 in b6 => r1c9<>3
3. 2-String Kite: 9 in r5c4,r8c9 (connected by r4c9,r5c8) => r8c4<>9
4. Locked Candidates Type 1 (Pointing): 9 in b8 => r4c5<>9
5. Naked Pair: 1,6 in r7c6,r8c4 => r7c5,r8c6<>1, r8c6<>6
6. Row 8 / Column 6 → 4 (Naked Single)
7. XY-Wing: 1/9/5 in r38c9,r7c8 => r123c8<>5
8. Discontinuous Nice Loop: 7/8 r3c8 =6= r3c7 -6- r6c7 =6= r6c4 -6- r8c4 -1- r8c9 -9- r4c9 =9= r5c8 =6= r3c8 => r3c8<>7, r3c8<>8
9. Row 3 / Column 8 → 6 (Naked Single)
10. Discontinuous Nice Loop: 8 r1c3 -8- r9c3 -9- r9c5 -2- r9c7 =2= r7c7 =1= r7c6 =6= r7c1 -6- r1c1 =6= r1c3 => r1c3<>8
11. Discontinuous Nice Loop: 4 r4c1 -4- r4c5 =4= r6c5 =8= r6c2 =3= r4c1 => r4c1<>4
12. Discontinuous Nice Loop: 7 r4c4 -7- r6c4 -6- r8c4 -1- r8c9 -9- r4c9 =9= r4c4 => r4c4<>7
13. Discontinuous Nice Loop: 1 r5c4 -1- r8c4 =1= r8c9 =9= r4c9 -9- r4c4 =9= r5c4 => r5c4<>1
14. Discontinuous Nice Loop: 5 r7c1 -5- r7c8 -9- r8c9 -1- r8c4 -6- r7c6 =6= r7c1 => r7c1<>5
15. Locked Candidates Type 1 (Pointing): 5 in b7 => r123c2<>5
16. Locked Candidates Type 2 (Claiming): 5 in r3 => r1c9,r2c7<>5
17. AIC: 5 5- r7c8 -9- r5c8 =9= r4c9 =3= r4c1 -3- r7c1 =3= r7c2 =5= r9c2 -5 => r7c2,r9c78<>5
18. Row 9 / Column 2 → 5 (Hidden Single)
19. AIC: 4 4- r1c9 -1- r8c9 =1= r7c7 =2= r9c7 =4= r9c8 -4 => r12c8<>4
20. Continuous Nice Loop: 4/5 9= r4c9 =3= r4c1 -3- r7c1 -6- r7c6 -1- r7c7 =1= r8c9 =9= r4c9 =3 => r4c9<>4, r4c9<>5
21. Row 3 / Column 9 → 5 (Hidden Single)
22. 2-String Kite: 1 in r1c9,r7c6 (connected by r7c7,r8c9) => r1c6<>1
23. Finned Swordfish: 1 r357 c267 fr3c5 => r2c6<>1
24. Multi Colors 1: 1 (r1c9,r7c7,r8c4) / (r7c6,r8c9), (r4c3,r5c6) / (r5c2) => r1c2<>1
25. Discontinuous Nice Loop: 1 r1c3 -1- r1c9 =1= r8c9 -1- r8c4 -6- r8c3 =6= r1c3 => r1c3<>1
26. Skyscraper: 1 in r1c5,r8c4 (connected by r18c9) => r2c4<>1
27. Locked Candidates Type 1 (Pointing): 1 in b2 => r4c5<>1
28. Finned Swordfish: 1 r257 c267 fr2c3 => r3c2<>1
29. Locked Candidates Type 1 (Pointing): 1 in b1 => r2c7<>1
30. Hidden Pair: 1,9 in r2c23 => r2c2<>4, r2c23<>7, r2c23<>8
31. Discontinuous Nice Loop: 8 r1c5 -8- r6c5 =8= r6c2 =3= r6c9 =4= r1c9 =1= r1c5 => r1c5<>8
32. XY-Chain: 7 7- r1c5 -1- r1c9 -4- r6c9 -3- r4c9 -9- r8c9 -1- r8c4 -6- r6c4 -7 => r2c4,r46c5<>7
33. Row 2 / Column 4 → 5 (Naked Single)
34. Row 1 / Column 1 → 5 (Hidden Single)
35. Row 1 / Column 3 → 6 (Hidden Single)
36. Locked Pair: 3,8 in r12c6 => r3c5,r4c6<>8
37. Uniqueness Test 2: 3/8 in r1c68,r2c68 => r23c7,r5c8<>7
38. Naked Triple: 1,4,8 in r1c9,r23c7 => r12c8<>8
39. Locked Candidates Type 1 (Pointing): 8 in b3 => r9c7<>8
40. XY-Chain: 3 3- r1c8 -7- r1c5 -1- r1c9 -4- r2c7 -8- r2c6 -3 => r1c6,r2c8<>3
41. Row 1 / Column 6 → 8 (Naked Single)
42. Row 2 / Column 8 → 7 (Naked Single)
43. Row 2 / Column 6 → 3 (Naked Single)
44. Row 1 / Column 8 → 3 (Naked Single)
45. Locked Candidates Type 1 (Pointing): 7 in b1 => r56c2<>7
46. Naked Triple: 3,4,8 in r6c259 => r6c7<>4
47. XY-Chain: 1 1- r4c4 -9- r4c9 -3- r6c9 -4- r1c9 -1- r1c5 -7- r1c2 -4- r5c2 -1 => r4c3,r5c6<>1
48. Row 2 / Column 3 → 1 (Hidden Single)
49. Row 2 / Column 2 → 9 (Naked Single)
50. Row 7 / Column 2 → 3 (Naked Single)
51. Row 7 / Column 1 → 6 (Naked Single)
52. Row 7 / Column 6 → 1 (Naked Single)
53. Row 4 / Column 6 → 5 (Naked Single)
54. Row 5 / Column 6 → 6 (Full House)
55. Row 8 / Column 4 → 6 (Naked Single)
56. Row 6 / Column 4 → 7 (Naked Single)
57. Row 5 / Column 4 → 9 (Naked Single)
58. Row 4 / Column 4 → 1 (Full House)
59. Row 6 / Column 7 → 6 (Naked Single)
60. Row 5 / Column 2 → 1 (Hidden Single)
61. Row 6 / Column 9 → 3 (Hidden Single)
62. Row 4 / Column 9 → 9 (Naked Single)
63. Row 8 / Column 9 → 1 (Naked Single)
64. Row 1 / Column 9 → 4 (Full House)
65. Row 1 / Column 2 → 7 (Naked Single)
66. Row 1 / Column 5 → 1 (Full House)
67. Row 3 / Column 5 → 7 (Full House)
68. Row 2 / Column 7 → 8 (Naked Single)
69. Row 2 / Column 1 → 4 (Full House)
70. Row 3 / Column 2 → 8 (Full House)
71. Row 3 / Column 7 → 1 (Full House)
72. Row 6 / Column 2 → 4 (Full House)
73. Row 6 / Column 5 → 8 (Full House)
74. Row 4 / Column 5 → 4 (Full House)
75. Row 5 / Column 1 → 7 (Naked Single)
76. Row 4 / Column 7 → 7 (Naked Single)
77. Row 4 / Column 3 → 8 (Naked Single)
78. Row 4 / Column 1 → 3 (Full House)
79. Row 8 / Column 1 → 8 (Full House)
80. Row 9 / Column 3 → 9 (Naked Single)
81. Row 8 / Column 3 → 7 (Full House)
82. Row 8 / Column 8 → 9 (Full House)
83. Row 9 / Column 5 → 2 (Naked Single)
84. Row 7 / Column 5 → 9 (Full House)
85. Row 7 / Column 8 → 5 (Naked Single)
86. Row 7 / Column 7 → 2 (Full House)
87. Row 9 / Column 7 → 4 (Naked Single)
88. Row 5 / Column 7 → 5 (Full House)
89. Row 5 / Column 8 → 4 (Full House)
90. Row 9 / Column 8 → 8 (Full House)