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

This Sudoku Puzzle has 108 steps and it is solved using Locked Candidates Type 1 (Pointing), undefined, AIC, Hidden Single, Discontinuous Nice Loop, Grouped AIC, Grouped Discontinuous Nice Loop, Locked Candidates Type 2 (Claiming), Naked Single, Hidden Pair, Finned Swordfish, Continuous Nice Loop, Naked Triple, Naked Pair, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 3 in b6 => r1c9<>3
  2. 2-String Kite: 9 in r5c4,r8c9 (connected by r4c9,r5c8) => r8c4<>9
  3. AIC: 2/6 6- r1c3 =6= r8c3 -6- r8c4 -1- r8c9 =1= r7c7 =2= r7c5 -2- r3c5 =2= r3c1 -2 => r1c3<>2, r3c1<>6
  4. Row 5 / Column 3 → 2 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 6 in b1 => r1c8<>6
  6. Discontinuous Nice Loop: 7 r1c4 -7- r6c4 -6- r8c4 -1- r8c9 =1= r7c7 =2= r7c5 -2- r9c4 =2= r1c4 => r1c4<>7
  7. Discontinuous Nice Loop: 5 r3c1 -5- r3c9 -1- r8c9 =1= r7c7 =2= r7c5 -2- r3c5 =2= r3c1 => r3c1<>5
  8. Grouped AIC: 5/9 9- r2c2 =9= r2c3 -9- r8c3 =9= r8c89 -9- r7c8 -5- r7c12 =5= r9c2 -5 => r2c2<>5, r9c2<>9
  9. Grouped Discontinuous Nice Loop: 8 r1c3 -8- r9c3 -9- r9c45 =9= r7c5 =2= r7c7 =1= r8c9 -1- r8c4 -6- r8c3 =6= r1c3 => r1c3<>8
  10. Grouped Discontinuous Nice Loop: 5 r1c8 -5- r7c8 -9- r5c8 =9= r4c9 =5= r13c9 -5- r1c8 => r1c8<>5
  11. Grouped Discontinuous Nice Loop: 5 r2c7 -5- r3c789 =5= r3c2 -5- r9c2 =5= r7c12 -5- r7c8 -9- r5c8 =9= r4c9 =5= r13c9 -5- r2c7 => r2c7<>5
  12. Grouped Discontinuous Nice Loop: 5 r2c8 -5- r7c8 -9- r5c8 =9= r4c9 =5= r13c9 -5- r2c8 => r2c8<>5
  13. Grouped Discontinuous Nice Loop: 7 r3c1 -7- r8c1 =7= r8c3 =9= r8c89 -9- r7c8 -5- r7c12 =5= r9c2 =3= r9c4 =2= r1c4 -2- r1c1 =2= r3c1 => r3c1<>7
  14. Grouped Discontinuous Nice Loop: 5 r3c8 -5- r13c9 =5= r4c9 =9= r5c8 =6= r3c8 => r3c8<>5
  15. Grouped Discontinuous Nice Loop: 8 r3c8 =6= r3c7 -6- r6c7 =6= r6c4 -6- r8c4 -1- r8c9 =1= r7c7 =2= r9c7 =8= r23c7 -8- r3c8 => r3c8<>8
  16. Grouped Discontinuous Nice Loop: 9 r4c5 -9- r4c9 =9= r8c9 -9- r7c8 -5- r7c12 =5= r9c2 =3= r9c4 =9= r45c4 -9- r4c5 => r4c5<>9
  17. Locked Candidates Type 1 (Pointing): 9 in b5 => r9c4<>9
  18. AIC: 1/4 4- r8c6 =4= r9c5 =9= r7c5 =2= r7c7 =1= r8c9 -1 => r8c6<>1, r8c9<>4
  19. AIC: 6 6- r3c8 =6= r5c8 =9= r4c9 -9- r8c9 -1- r8c4 -6- r6c4 =6= r6c7 -6 => r3c7,r5c8<>6
  20. Row 3 / Column 8 → 6 (Hidden Single)
  21. Discontinuous Nice Loop: 7 r4c4 -7- r6c4 -6- r8c4 -1- r8c9 -9- r4c9 =9= r4c4 => r4c4<>7
  22. Discontinuous Nice Loop: 1 r5c4 -1- r8c4 =1= r8c9 =9= r4c9 -9- r4c4 =9= r5c4 => r5c4<>1
  23. Discontinuous Nice Loop: 5 r7c1 -5- r7c8 -9- r8c9 -1- r8c4 -6- r7c6 =6= r7c1 => r7c1<>5
  24. Locked Candidates Type 1 (Pointing): 5 in b7 => r13c2<>5
  25. Locked Candidates Type 2 (Claiming): 5 in r3 => r1c9<>5
  26. Discontinuous Nice Loop: 1 r1c3 -1- r1c9 -4- r6c9 -3- r6c2 =3= r4c1 -3- r7c1 -6- r1c1 =6= r1c3 => r1c3<>1
  27. 2-String Kite: 1 in r2c3,r5c6 (connected by r4c3,r5c2) => r2c6<>1
  28. Discontinuous Nice Loop: 6 r8c6 -6- r8c4 -1- r8c9 =1= r7c7 =2= r7c5 =9= r9c5 =4= r8c6 => r8c6<>6
  29. Row 8 / Column 6 → 4 (Naked Single)
  30. AIC: 1 1- r1c9 -4- r6c9 -3- r6c2 =3= r4c1 -3- r7c1 -6- r7c6 =6= r5c6 =1= r5c2 -1- r4c3 =1= r2c3 -1 => r1c2,r2c7<>1
  31. Finned X-Wing: 1 r18 c49 fr1c5 fr1c6 => r2c4<>1
  32. Locked Candidates Type 2 (Claiming): 1 in r2 => r3c2<>1
  33. Hidden Pair: 1,9 in r2c23 => r2c2<>4, r2c23<>7, r2c23<>8
  34. Finned Swordfish: 4 r259 c178 fr5c2 => r4c1<>4
  35. AIC: 4 4- r1c9 -1- r8c9 =1= r7c7 =2= r9c7 =4= r9c8 -4 => r12c8<>4
  36. AIC: 2/5 5- r1c1 =5= r2c1 =4= r2c7 -4- r1c9 -1- r8c9 =1= r7c7 =2= r7c5 -2- r9c4 =2= r1c4 -2 => r1c1<>2, r1c4<>5
  37. Row 3 / Column 1 → 2 (Hidden Single)
  38. AIC: 1/5 1- r3c7 =1= r7c7 -1- r8c9 =1= r8c4 =6= r7c6 -6- r7c1 -3- r4c1 =3= r4c9 =5= r3c9 -5 => r3c9<>1, r3c7<>5
  39. Row 3 / Column 9 → 5 (Naked Single)
  40. Discontinuous Nice Loop: 7 r4c5 -7- r6c4 -6- r8c4 =6= r7c6 -6- r7c1 -3- r4c1 =3= r4c9 -3- r6c9 -4- r6c5 =4= r4c5 => r4c5<>7
  41. Continuous Nice Loop: 4 9= r4c9 =3= r4c1 -3- r7c1 -6- r7c6 =6= r8c4 =1= r8c9 =9= r4c9 =3 => r4c9<>4
  42. Discontinuous Nice Loop: 7 r5c8 -7- r5c1 -4- r2c1 =4= r2c7 -4- r1c9 -1- r8c9 -9- r4c9 =9= r5c8 => r5c8<>7
  43. Locked Candidates Type 1 (Pointing): 7 in b6 => r23c7<>7
  44. Naked Triple: 1,4,8 in r1c9,r23c7 => r12c8<>8
  45. Locked Candidates Type 1 (Pointing): 8 in b3 => r9c7<>8
  46. XY-Chain: 7 7- r3c2 -8- r3c7 -1- r1c9 -4- r6c9 -3- r4c9 -9- r8c9 -1- r8c4 -6- r6c4 -7 => r6c2<>7
  47. XY-Chain: 6 6- r1c3 -7- r3c2 -8- r3c7 -1- r1c9 -4- r6c9 -3- r4c9 -9- r8c9 -1- r8c4 -6 => r8c3<>6
  48. Row 1 / Column 3 → 6 (Hidden Single)
  49. AIC: 7 7- r3c2 -8- r3c7 =8= r2c7 =4= r2c1 -4- r5c1 -7 => r12c1,r5c2<>7
  50. AIC: 7 7- r5c1 -4- r2c1 =4= r2c7 -4- r1c9 -1- r8c9 =1= r8c4 =6= r8c1 =7= r8c3 -7 => r4c3,r8c1<>7
  51. Row 8 / Column 3 → 7 (Hidden Single)
  52. Locked Candidates Type 2 (Claiming): 9 in r8 => r79c8<>9
  53. Row 7 / Column 8 → 5 (Naked Single)
  54. Row 9 / Column 2 → 5 (Hidden Single)
  55. Row 9 / Column 4 → 3 (Hidden Single)
  56. Row 1 / Column 4 → 2 (Hidden Single)
  57. Naked Pair: 1,6 in r7c6,r8c4 => r7c5<>1
  58. Naked Triple: 3,4,9 in r46c9,r5c8 => r456c7<>4
  59. Row 4 / Column 5 → 4 (Hidden Single)
  60. Locked Candidates Type 2 (Claiming): 1 in c5 => r1c6<>1
  61. Naked Pair: 6,7 in r6c47 => r6c5<>7
  62. Row 6 / Column 5 → 8 (Naked Single)
  63. Locked Candidates Type 1 (Pointing): 7 in b5 => r2c4<>7
  64. Row 2 / Column 4 → 5 (Naked Single)
  65. Row 2 / Column 8 → 7 (Hidden Single)
  66. Row 1 / Column 8 → 3 (Naked Single)
  67. Row 1 / Column 6 → 8 (Naked Single)
  68. Row 2 / Column 6 → 3 (Naked Single)
  69. Row 1 / Column 1 → 5 (Hidden Single)
  70. Row 3 / Column 2 → 8 (Hidden Single)
  71. Row 2 / Column 1 → 4 (Naked Single)
  72. Row 3 / Column 7 → 1 (Naked Single)
  73. Row 3 / Column 5 → 7 (Full House)
  74. Row 1 / Column 5 → 1 (Full House)
  75. Row 1 / Column 2 → 7 (Naked Single)
  76. Row 1 / Column 9 → 4 (Full House)
  77. Row 2 / Column 7 → 8 (Full House)
  78. Row 5 / Column 1 → 7 (Naked Single)
  79. Row 7 / Column 7 → 2 (Naked Single)
  80. Row 6 / Column 9 → 3 (Naked Single)
  81. Row 7 / Column 5 → 9 (Naked Single)
  82. Row 9 / Column 5 → 2 (Full House)
  83. Row 9 / Column 7 → 4 (Naked Single)
  84. Row 4 / Column 9 → 9 (Naked Single)
  85. Row 8 / Column 9 → 1 (Full House)
  86. Row 6 / Column 2 → 4 (Naked Single)
  87. Row 7 / Column 2 → 3 (Naked Single)
  88. Row 9 / Column 8 → 8 (Naked Single)
  89. Row 8 / Column 8 → 9 (Full House)
  90. Row 5 / Column 8 → 4 (Full House)
  91. Row 9 / Column 3 → 9 (Full House)
  92. Row 4 / Column 4 → 1 (Naked Single)
  93. Row 8 / Column 4 → 6 (Naked Single)
  94. Row 7 / Column 6 → 1 (Full House)
  95. Row 7 / Column 1 → 6 (Full House)
  96. Row 8 / Column 1 → 8 (Full House)
  97. Row 4 / Column 1 → 3 (Full House)
  98. Row 5 / Column 2 → 1 (Naked Single)
  99. Row 4 / Column 3 → 8 (Full House)
  100. Row 2 / Column 3 → 1 (Full House)
  101. Row 2 / Column 2 → 9 (Full House)
  102. Row 4 / Column 6 → 5 (Naked Single)
  103. Row 4 / Column 7 → 7 (Full House)
  104. Row 5 / Column 6 → 6 (Full House)
  105. Row 5 / Column 4 → 9 (Naked Single)
  106. Row 6 / Column 4 → 7 (Full House)
  107. Row 6 / Column 7 → 6 (Full House)
  108. Row 5 / Column 7 → 5 (Full House)
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