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

This Sudoku Puzzle has 104 steps and it is solved using Finned Swordfish, Locked Pair, Locked Candidates Type 1 (Pointing), Hidden Single, Discontinuous Nice Loop, Hidden Triple, AIC, Continuous Nice Loop, Naked Single, Naked Pair, undefined, Naked Triple, Sue de Coq, Hidden Pair, Locked Candidates Type 2 (Claiming), Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Finned Swordfish: 2 r357 c468 fr5c9 => r6c8<>2
  2. Locked Pair: 7,8 in r46c8 => r19c8,r45c7,r56c9<>7, r1c8,r45c7<>8
  3. Locked Candidates Type 1 (Pointing): 2 in b6 => r12c9<>2
  4. Finned Swordfish: 5 r148 c125 fr8c3 => r79c2,r9c1<>5
  5. Finned Swordfish: 6 r267 c257 fr2c9 => r3c7<>6
  6. Row 3 / Column 6 → 6 (Hidden Single)
  7. Locked Candidates Type 1 (Pointing): 1 in b2 => r1c789<>1
  8. Discontinuous Nice Loop: 3 r2c1 -3- r3c2 -9- r4c2 =9= r4c7 -9- r5c7 -1- r3c7 =1= r3c8 =2= r1c8 -2- r1c1 =2= r2c1 => r2c1<>3
  9. Discontinuous Nice Loop: 9 r1c7 -9- r4c7 =9= r4c2 -9- r3c2 -3- r7c2 -6- r7c7 =6= r2c7 =8= r1c7 => r1c7<>9
  10. Discontinuous Nice Loop: 3 r3c3 -3- r3c2 -9- r4c2 =9= r4c7 -9- r5c7 -1- r3c7 =1= r3c8 =2= r3c4 =4= r3c3 => r3c3<>3
  11. Discontinuous Nice Loop: 9 r2c7 -9- r4c7 =9= r4c2 -9- r3c2 -3- r7c2 -6- r7c7 =6= r2c7 => r2c7<>9
  12. Discontinuous Nice Loop: 3 r3c4 -3- r3c2 -9- r4c2 =9= r4c7 -9- r5c7 -1- r3c7 =1= r3c8 =2= r3c4 => r3c4<>3
  13. Discontinuous Nice Loop: 3 r3c8 -3- r3c2 -9- r4c2 =9= r4c7 -9- r5c7 -1- r3c7 =1= r3c8 => r3c8<>3
  14. Discontinuous Nice Loop: 3 r1c7 -3- r3c7 =3= r3c2 -3- r7c2 -6- r7c7 =6= r2c7 =8= r1c7 => r1c7<>3
  15. Discontinuous Nice Loop: 3 r2c7 -3- r3c7 =3= r3c2 -3- r7c2 -6- r7c7 =6= r2c7 => r2c7<>3
  16. Hidden Triple: 1,2,3 in r13c8,r3c7 => r3c7<>9
  17. Locked Candidates Type 1 (Pointing): 9 in b3 => r5c9<>9
  18. AIC: 3/9 3- r2c4 =3= r2c3 -3- r3c2 =3= r3c7 =1= r3c8 =2= r3c4 -2- r2c5 -9- r9c5 =9= r9c4 -9 => r9c4<>3, r2c4<>9
  19. AIC: 1 1- r3c7 -3- r3c2 -9- r4c2 =9= r4c7 -9- r5c7 -1 => r78c7<>1
  20. Discontinuous Nice Loop: 9 r1c2 -9- r1c9 =9= r2c9 -9- r2c5 -2- r2c1 =2= r1c1 =5= r1c2 => r1c2<>9
  21. Discontinuous Nice Loop: 2 r2c4 -2- r2c1 =2= r1c1 -2- r1c8 -3- r3c7 =3= r3c2 -3- r2c3 =3= r2c4 => r2c4<>2
  22. Discontinuous Nice Loop: 2 r6c4 -2- r6c9 =2= r5c9 =1= r5c7 -1- r3c7 =1= r3c8 =2= r3c4 -2- r6c4 => r6c4<>2
  23. Continuous Nice Loop: 3/4/6 6= r6c5 =2= r6c9 =4= r4c7 =9= r4c2 -9- r3c2 -3- r7c2 -6- r6c2 =6= r6c5 =2 => r19c2<>3, r6c5<>4, r9c2<>6
  24. AIC: 3 3- r1c8 =3= r3c7 =1= r5c7 -1- r5c9 -2- r6c9 =2= r6c5 =6= r6c2 =3= r6c3 -3- r2c3 =3= r2c4 -3 => r1c46<>3
  25. Row 2 / Column 4 → 3 (Hidden Single)
  26. Locked Candidates Type 1 (Pointing): 7 in b2 => r1c79<>7
  27. Row 1 / Column 7 → 8 (Naked Single)
  28. Row 1 / Column 9 → 9 (Naked Single)
  29. Row 1 / Column 2 → 5 (Naked Single)
  30. Finned Swordfish: 8 r258 c136 fr5c4 => r4c6<>8
  31. Continuous Nice Loop: 3/4/8 6= r4c1 =5= r4c5 =6= r6c5 =2= r6c9 =4= r4c7 =9= r4c2 -9- r3c2 -3- r7c2 -6- r9c1 =6= r4c1 =5 => r6c2<>3, r4c5<>4, r4c1<>8
  32. Row 6 / Column 3 → 3 (Hidden Single)
  33. Naked Pair: 5,6 in r4c15 => r4c2<>6
  34. 2-String Kite: 3 in r1c8,r7c2 (connected by r1c1,r3c2) => r7c8<>3
  35. W-Wing: 7/8 in r6c8,r9c2 connected by 8 in r4c28 => r6c2<>7
  36. Naked Triple: 5,6,8 in r45c1,r6c2 => r4c2,r5c3<>8, r5c3<>5
  37. Row 4 / Column 8 → 8 (Hidden Single)
  38. Row 6 / Column 8 → 7 (Naked Single)
  39. Locked Candidates Type 1 (Pointing): 5 in b4 => r8c1<>5
  40. XY-Chain: 4 4- r3c3 -9- r3c2 -3- r7c2 -6- r6c2 -8- r6c4 -4 => r3c4<>4
  41. Row 3 / Column 3 → 4 (Hidden Single)
  42. Naked Pair: 2,9 in r2c5,r3c4 => r1c456<>2
  43. Naked Pair: 1,5 in r7c38 => r7c4<>5, r7c6<>1
  44. Hidden Triple: 3,4,6 in r7c2,r89c1 => r89c1<>8
  45. Finned X-Wing: 4 r47 c67 fr7c4 => r89c6<>4
  46. Sue de Coq: r89c5 - {1459} (r246c5 - {2569}, r7c46,r89c6 - {12348}) => r9c4<>4, r9c4<>8
  47. Locked Candidates Type 1 (Pointing): 8 in b8 => r5c6<>8
  48. Hidden Pair: 5,8 in r5c14 => r5c4<>2, r5c4<>7
  49. Row 1 / Column 4 → 7 (Hidden Single)
  50. 2-String Kite: 4 in r4c7,r7c4 (connected by r4c6,r6c4) => r7c7<>4
  51. Locked Candidates Type 2 (Claiming): 4 in r7 => r89c5<>4
  52. Row 1 / Column 5 → 4 (Hidden Single)
  53. Row 1 / Column 6 → 1 (Naked Single)
  54. Naked Pair: 3,8 in r89c6 => r7c6<>3
  55. Hidden Pair: 4,6 in r9c19 => r9c1<>3, r9c9<>1, r9c9<>7
  56. Locked Candidates Type 1 (Pointing): 7 in b9 => r8c3<>7
  57. X-Wing: 3 r37 c27 => r8c7<>3
  58. XY-Wing: 4/7/6 in r28c7,r9c9 => r2c9,r7c7<>6
  59. Row 2 / Column 9 → 7 (Naked Single)
  60. Row 7 / Column 7 → 3 (Naked Single)
  61. Row 2 / Column 7 → 6 (Naked Single)
  62. Row 3 / Column 7 → 1 (Naked Single)
  63. Row 7 / Column 2 → 6 (Naked Single)
  64. Row 3 / Column 8 → 2 (Naked Single)
  65. Row 1 / Column 8 → 3 (Full House)
  66. Row 1 / Column 1 → 2 (Full House)
  67. Row 5 / Column 7 → 9 (Naked Single)
  68. Row 6 / Column 2 → 8 (Naked Single)
  69. Row 9 / Column 1 → 4 (Naked Single)
  70. Row 3 / Column 4 → 9 (Naked Single)
  71. Row 2 / Column 5 → 2 (Full House)
  72. Row 3 / Column 2 → 3 (Full House)
  73. Row 2 / Column 1 → 8 (Naked Single)
  74. Row 2 / Column 3 → 9 (Full House)
  75. Row 4 / Column 7 → 4 (Naked Single)
  76. Row 8 / Column 7 → 7 (Full House)
  77. Row 5 / Column 3 → 7 (Naked Single)
  78. Row 5 / Column 1 → 5 (Naked Single)
  79. Row 6 / Column 4 → 4 (Naked Single)
  80. Row 9 / Column 2 → 7 (Naked Single)
  81. Row 4 / Column 2 → 9 (Full House)
  82. Row 4 / Column 1 → 6 (Full House)
  83. Row 8 / Column 1 → 3 (Full House)
  84. Row 9 / Column 9 → 6 (Naked Single)
  85. Row 9 / Column 4 → 5 (Naked Single)
  86. Row 6 / Column 5 → 6 (Naked Single)
  87. Row 6 / Column 9 → 2 (Full House)
  88. Row 5 / Column 9 → 1 (Full House)
  89. Row 8 / Column 9 → 4 (Full House)
  90. Row 4 / Column 6 → 7 (Naked Single)
  91. Row 4 / Column 5 → 5 (Full House)
  92. Row 5 / Column 6 → 2 (Naked Single)
  93. Row 5 / Column 4 → 8 (Full House)
  94. Row 7 / Column 4 → 2 (Full House)
  95. Row 8 / Column 6 → 8 (Naked Single)
  96. Row 8 / Column 5 → 1 (Naked Single)
  97. Row 8 / Column 3 → 5 (Full House)
  98. Row 9 / Column 5 → 9 (Full House)
  99. Row 9 / Column 8 → 1 (Naked Single)
  100. Row 7 / Column 8 → 5 (Full House)
  101. Row 7 / Column 6 → 4 (Naked Single)
  102. Row 9 / Column 6 → 3 (Full House)
  103. Row 7 / Column 3 → 1 (Full House)
  104. Row 9 / Column 3 → 8 (Full House)
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