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

This Sudoku Puzzle has 88 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Pair, undefined, Finned Swordfish, Discontinuous Nice Loop, Naked Single, Locked Candidates Type 2 (Claiming), Hidden Rectangle, Hidden Single, Continuous Nice Loop, Naked Pair, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 6 in b5 => r6c79<>6
  2. Locked Candidates Type 1 (Pointing): 9 in b5 => r6c13<>9
  3. Hidden Pair: 6,9 in r6c46 => r6c46<>1, r6c4<>2, r6c46<>8
  4. XYZ-Wing: 1/5/8 in r48c5,r5c6 => r6c5<>1
  5. Finned X-Wing: 5 c57 r48 fr7c7 fr9c7 => r8c9<>5
  6. Finned Swordfish: 5 r159 c489 fr9c7 => r7c8<>5
  7. Discontinuous Nice Loop: 1/8 r4c5 =5= r8c5 -5- r8c3 =5= r7c3 =2= r6c3 -2- r6c5 =2= r5c4 =5= r4c5 => r4c5<>1, r4c5<>8
  8. Row 4 / Column 5 → 5 (Naked Single)
  9. Row 8 / Column 5 → 1 (Naked Single)
  10. Row 3 / Column 5 → 4 (Naked Single)
  11. Locked Candidates Type 1 (Pointing): 1 in b5 => r5c289<>1
  12. Locked Candidates Type 2 (Claiming): 8 in r4 => r6c13<>8
  13. Locked Candidates Type 2 (Claiming): 5 in c7 => r9c89<>5
  14. Hidden Rectangle: 4/5 in r1c89,r5c89 => r1c8<>4
  15. Discontinuous Nice Loop: 7 r4c1 -7- r6c1 -4- r5c2 -2- r5c4 =2= r2c4 -2- r2c5 -8- r2c1 =8= r4c1 => r4c1<>7
  16. Discontinuous Nice Loop: 8 r2c1 -8- r2c5 -2- r2c4 =2= r5c4 -2- r5c2 -4- r6c1 -7- r8c1 -9- r4c1 -8- r2c1 => r2c1<>8
  17. Row 4 / Column 1 → 8 (Hidden Single)
  18. Discontinuous Nice Loop: 1 r5c4 -1- r5c6 -8- r9c6 =8= r9c4 =5= r9c7 =2= r9c2 -2- r5c2 =2= r5c4 => r5c4<>1
  19. Row 5 / Column 6 → 1 (Hidden Single)
  20. Discontinuous Nice Loop: 7 r6c8 -7- r6c1 -4- r5c2 -2- r5c4 -8- r5c8 =8= r6c8 => r6c8<>7
  21. Locked Candidates Type 1 (Pointing): 7 in b6 => r89c9<>7
  22. Locked Candidates Type 2 (Claiming): 7 in r8 => r7c123,r9c2<>7
  23. Continuous Nice Loop: 4/7/9 5= r7c3 =2= r6c3 -2- r5c2 -4- r6c1 -7- r8c1 =7= r8c3 =5= r7c3 =2 => r7c3<>4, r2c1<>7, r78c3<>9
  24. Discontinuous Nice Loop: 7/8/9 r9c4 =5= r9c7 =2= r9c2 -2- r7c3 -5- r7c4 =5= r9c4 => r9c4<>7, r9c4<>8, r9c4<>9
  25. Row 9 / Column 4 → 5 (Naked Single)
  26. Row 9 / Column 6 → 8 (Hidden Single)
  27. Row 9 / Column 8 → 7 (Hidden Single)
  28. Locked Candidates Type 1 (Pointing): 9 in b8 => r7c128<>9
  29. Locked Candidates Type 1 (Pointing): 9 in b9 => r2c9<>9
  30. XYZ-Wing: 2/4/6 in r57c2,r7c1 => r9c2<>4
  31. Locked Candidates Type 1 (Pointing): 4 in b7 => r7c78<>4
  32. Row 7 / Column 8 → 1 (Naked Single)
  33. Naked Pair: 2,5 in r7c37 => r7c2<>2
  34. XY-Wing: 2/9/4 in r59c2,r9c9 => r5c9<>4
  35. Row 5 / Column 9 → 5 (Naked Single)
  36. Row 1 / Column 8 → 5 (Hidden Single)
  37. XY-Chain: 4 4- r5c2 -2- r9c2 -9- r8c1 -7- r6c1 -4- r7c1 -6- r7c2 -4 => r12c2<>4
  38. XY-Chain: 4 4- r6c1 -7- r8c1 -9- r9c2 -2- r5c2 -4- r7c2 -6- r7c1 -4 => r2c1<>4
  39. Locked Candidates Type 1 (Pointing): 4 in b1 => r6c3<>4
  40. Hidden Pair: 4,8 in r12c3 => r12c3<>1, r2c3<>7, r2c3<>9
  41. XY-Chain: 4 4- r2c3 -8- r2c5 -2- r6c5 -8- r5c4 -2- r5c2 -4- r6c1 -7- r8c1 -9- r9c2 -2- r9c7 -4 => r2c7<>4
  42. XY-Chain: 4 4- r6c1 -7- r8c1 -9- r9c2 -2- r9c7 -4 => r6c7<>4
  43. Row 9 / Column 7 → 4 (Hidden Single)
  44. Row 9 / Column 9 → 9 (Naked Single)
  45. Row 9 / Column 2 → 2 (Full House)
  46. Row 8 / Column 9 → 3 (Naked Single)
  47. Row 5 / Column 2 → 4 (Naked Single)
  48. Row 7 / Column 3 → 5 (Naked Single)
  49. Row 8 / Column 7 → 5 (Naked Single)
  50. Row 7 / Column 7 → 2 (Full House)
  51. Row 5 / Column 8 → 8 (Naked Single)
  52. Row 5 / Column 4 → 2 (Full House)
  53. Row 6 / Column 1 → 7 (Naked Single)
  54. Row 7 / Column 2 → 6 (Naked Single)
  55. Row 8 / Column 3 → 7 (Naked Single)
  56. Row 8 / Column 1 → 9 (Full House)
  57. Row 7 / Column 1 → 4 (Full House)
  58. Row 2 / Column 1 → 6 (Full House)
  59. Row 6 / Column 5 → 8 (Naked Single)
  60. Row 2 / Column 5 → 2 (Full House)
  61. Row 6 / Column 3 → 2 (Hidden Single)
  62. Row 4 / Column 9 → 7 (Hidden Single)
  63. Row 4 / Column 7 → 6 (Hidden Single)
  64. Row 1 / Column 9 → 6 (Hidden Single)
  65. Row 1 / Column 6 → 3 (Naked Single)
  66. Row 1 / Column 2 → 1 (Naked Single)
  67. Row 1 / Column 4 → 8 (Naked Single)
  68. Row 1 / Column 3 → 4 (Full House)
  69. Row 3 / Column 3 → 9 (Naked Single)
  70. Row 4 / Column 2 → 9 (Naked Single)
  71. Row 4 / Column 3 → 1 (Full House)
  72. Row 2 / Column 3 → 8 (Full House)
  73. Row 3 / Column 8 → 3 (Naked Single)
  74. Row 2 / Column 7 → 1 (Naked Single)
  75. Row 6 / Column 7 → 3 (Full House)
  76. Row 3 / Column 2 → 7 (Naked Single)
  77. Row 2 / Column 2 → 3 (Full House)
  78. Row 6 / Column 8 → 4 (Naked Single)
  79. Row 2 / Column 8 → 9 (Full House)
  80. Row 2 / Column 9 → 4 (Full House)
  81. Row 2 / Column 4 → 7 (Full House)
  82. Row 6 / Column 9 → 1 (Full House)
  83. Row 3 / Column 6 → 6 (Naked Single)
  84. Row 3 / Column 4 → 1 (Full House)
  85. Row 7 / Column 4 → 9 (Naked Single)
  86. Row 6 / Column 4 → 6 (Full House)
  87. Row 6 / Column 6 → 9 (Full House)
  88. Row 7 / Column 6 → 7 (Full House)
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