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

This Sudoku Puzzle has 86 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, undefined, Hidden Rectangle, AIC, Discontinuous Nice Loop, Naked Single, Finned Jellyfish, Sue de Coq, Locked Candidates Type 2 (Claiming), Naked Pair, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 2 → 4 (Hidden Single)
  2. Row 6 / Column 6 → 4 (Hidden Single)
  3. Row 8 / Column 8 → 7 (Hidden Single)
  4. Row 7 / Column 3 → 7 (Hidden Single)
  5. Row 6 / Column 8 → 2 (Hidden Single)
  6. Row 4 / Column 6 → 2 (Hidden Single)
  7. Row 4 / Column 9 → 7 (Hidden Single)
  8. Row 1 / Column 7 → 7 (Hidden Single)
  9. Row 2 / Column 5 → 7 (Hidden Single)
  10. Row 3 / Column 7 → 5 (Hidden Single)
  11. Row 1 / Column 1 → 5 (Hidden Single)
  12. Row 7 / Column 7 → 4 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 8 in b1 => r59c3<>8
  14. Locked Candidates Type 1 (Pointing): 6 in b6 => r5c3<>6
  15. Locked Candidates Type 1 (Pointing): 9 in b9 => r7c456<>9
  16. Naked Triple: 1,2,8 in r2c389 => r2c46<>1
  17. X-Wing: 8 r59 c15 => r7c15<>8
  18. 2-String Kite: 6 in r3c4,r7c8 (connected by r1c8,r3c9) => r7c4<>6
  19. 2-String Kite: 9 in r3c1,r6c4 (connected by r5c1,r6c3) => r3c4<>9
  20. Hidden Rectangle: 1/8 in r1c38,r2c38 => r1c3<>1
  21. AIC: 3/6 6- r9c3 =6= r6c3 =9= r6c4 -9- r4c4 =9= r4c8 -9- r7c8 =9= r7c9 =3= r9c9 -3 => r9c3<>3, r9c9<>6
  22. Row 5 / Column 3 → 3 (Hidden Single)
  23. Discontinuous Nice Loop: 1 r5c5 -1- r6c4 -9- r6c3 =9= r5c1 =8= r5c5 => r5c5<>1
  24. Discontinuous Nice Loop: 1 r5c6 -1- r6c4 -9- r6c3 =9= r5c1 =8= r5c5 =5= r5c6 => r5c6<>1
  25. Locked Candidates Type 1 (Pointing): 1 in b5 => r378c4<>1
  26. Row 3 / Column 4 → 6 (Naked Single)
  27. Discontinuous Nice Loop: 1 r7c9 -1- r9c7 -6- r5c7 =6= r5c9 =9= r7c9 => r7c9<>1
  28. Discontinuous Nice Loop: 3 r7c9 -3- r9c9 -1- r9c7 -6- r5c7 =6= r5c9 =9= r7c9 => r7c9<>3
  29. Row 9 / Column 9 → 3 (Hidden Single)
  30. Discontinuous Nice Loop: 5 r8c4 -5- r8c2 =5= r7c2 =8= r7c4 -8- r4c4 =8= r5c5 =5= r5c6 -5- r2c6 =5= r2c4 -5- r8c4 => r8c4<>5
  31. AIC: 1 1- r8c1 -3- r8c4 -9- r6c4 =9= r6c3 =6= r9c3 -6- r9c7 -1 => r9c13<>1
  32. Discontinuous Nice Loop: 1 r3c1 -1- r8c1 -3- r8c4 -9- r6c4 =9= r6c3 -9- r5c1 =9= r3c1 => r3c1<>1
  33. Locked Candidates Type 1 (Pointing): 1 in b1 => r6c3<>1
  34. AIC: 8 8- r1c3 -9- r6c3 -6- r9c3 =6= r9c7 =1= r7c8 -1- r2c8 -8 => r1c8,r2c3<>8
  35. Row 1 / Column 3 → 8 (Hidden Single)
  36. Row 2 / Column 8 → 8 (Hidden Single)
  37. Locked Candidates Type 1 (Pointing): 9 in b1 => r3c5<>9
  38. Hidden Rectangle: 1/4 in r1c59,r3c59 => r1c9<>1
  39. Discontinuous Nice Loop: 1 r8c6 -1- r9c5 =1= r9c7 =6= r9c3 -6- r8c2 =6= r8c6 => r8c6<>1
  40. Finned Jellyfish: 1 c2468 r1467 fr8c2 => r7c1<>1
  41. Discontinuous Nice Loop: 3 r7c4 -3- r7c1 -2- r7c5 =2= r9c5 =8= r7c4 => r7c4<>3
  42. Sue de Coq: r789c5 - {12589} (r13c5 - {149}, r7c4 - {58}) => r78c6<>5, r5c5<>9
  43. AIC: 1 1- r4c2 -8- r4c4 =8= r7c4 =5= r2c4 =3= r8c4 -3- r8c1 -1 => r5c1,r78c2<>1
  44. Row 8 / Column 1 → 1 (Hidden Single)
  45. Row 7 / Column 1 → 3 (Hidden Single)
  46. Row 7 / Column 5 → 2 (Hidden Single)
  47. Locked Candidates Type 2 (Claiming): 1 in r5 => r4c8<>1
  48. Row 4 / Column 8 → 9 (Naked Single)
  49. Row 7 / Column 9 → 9 (Hidden Single)
  50. Naked Pair: 1,6 in r7c68 => r7c2<>6
  51. X-Wing: 1 c68 r17 => r1c5<>1
  52. W-Wing: 5/9 in r5c6,r8c5 connected by 9 in r1c56 => r5c5<>5
  53. Row 5 / Column 5 → 8 (Naked Single)
  54. Row 4 / Column 4 → 1 (Naked Single)
  55. Row 4 / Column 2 → 8 (Full House)
  56. Row 5 / Column 1 → 9 (Naked Single)
  57. Row 9 / Column 5 → 1 (Naked Single)
  58. Row 6 / Column 4 → 9 (Naked Single)
  59. Row 5 / Column 6 → 5 (Full House)
  60. Row 7 / Column 2 → 5 (Naked Single)
  61. Row 3 / Column 1 → 2 (Naked Single)
  62. Row 9 / Column 1 → 8 (Full House)
  63. Row 6 / Column 3 → 6 (Naked Single)
  64. Row 6 / Column 2 → 1 (Full House)
  65. Row 8 / Column 2 → 6 (Full House)
  66. Row 9 / Column 3 → 2 (Full House)
  67. Row 9 / Column 7 → 6 (Full House)
  68. Row 5 / Column 7 → 1 (Full House)
  69. Row 7 / Column 8 → 1 (Full House)
  70. Row 5 / Column 9 → 6 (Full House)
  71. Row 1 / Column 8 → 6 (Full House)
  72. Row 3 / Column 5 → 4 (Naked Single)
  73. Row 7 / Column 6 → 6 (Naked Single)
  74. Row 7 / Column 4 → 8 (Full House)
  75. Row 8 / Column 4 → 3 (Naked Single)
  76. Row 2 / Column 4 → 5 (Full House)
  77. Row 2 / Column 6 → 3 (Naked Single)
  78. Row 2 / Column 3 → 1 (Naked Single)
  79. Row 2 / Column 9 → 2 (Full House)
  80. Row 3 / Column 3 → 9 (Full House)
  81. Row 3 / Column 9 → 1 (Full House)
  82. Row 1 / Column 9 → 4 (Full House)
  83. Row 1 / Column 5 → 9 (Naked Single)
  84. Row 1 / Column 6 → 1 (Full House)
  85. Row 8 / Column 6 → 9 (Full House)
  86. Row 8 / Column 5 → 5 (Full House)
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