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

This Sudoku Puzzle has 94 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, Hidden Pair, undefined, Empty Rectangle, Discontinuous Nice Loop, Naked Single, Grouped Discontinuous Nice Loop, AIC, Turbot Fish, Full House, Sashimi Swordfish techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 6 → 5 (Hidden Single)
  2. Row 6 / Column 6 → 2 (Hidden Single)
  3. Row 9 / Column 3 → 6 (Hidden Single)
  4. Row 4 / Column 7 → 2 (Hidden Single)
  5. Row 1 / Column 8 → 2 (Hidden Single)
  6. Row 2 / Column 5 → 9 (Hidden Single)
  7. Row 2 / Column 3 → 2 (Hidden Single)
  8. Row 2 / Column 9 → 1 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 4 in b2 => r89c4<>4
  10. Locked Candidates Type 1 (Pointing): 6 in b3 => r3c4<>6
  11. Locked Candidates Type 1 (Pointing): 1 in b5 => r189c5<>1
  12. Locked Candidates Type 1 (Pointing): 6 in b5 => r5c9<>6
  13. Naked Pair: 7,8 in r1c25 => r1c46<>7, r1c4<>8
  14. Naked Triple: 1,6,7 in r157c6 => r89c6<>1, r89c6<>7
  15. Hidden Pair: 3,6 in r36c7 => r3c7<>7, r36c7<>8, r6c7<>5
  16. Locked Candidates Type 1 (Pointing): 5 in b6 => r8c9<>5
  17. 2-String Kite: 8 in r2c7,r8c5 (connected by r1c5,r2c4) => r8c7<>8
  18. Empty Rectangle: 7 in b5 (r1c25) => r5c2<>7
  19. Empty Rectangle: 7 in b7 (r38c9) => r3c2<>7
  20. Empty Rectangle: 7 in b7 (r1c25) => r8c5<>7
  21. Discontinuous Nice Loop: 7 r3c4 -7- r3c9 =7= r2c7 =8= r2c4 =4= r3c4 => r3c4<>7
  22. Discontinuous Nice Loop: 1 r6c2 -1- r6c5 -3- r6c7 =3= r3c7 -3- r3c8 -8- r3c4 -4- r3c2 =4= r6c2 => r6c2<>1
  23. Discontinuous Nice Loop: 3 r6c1 -3- r6c7 -6- r3c7 =6= r3c9 =7= r8c9 -7- r8c1 -3- r6c1 => r6c1<>3
  24. XY-Chain: 3 3- r3c8 -8- r2c7 -7- r2c1 -4- r6c1 -6- r6c7 -3 => r3c7,r5c8<>3
  25. Row 3 / Column 7 → 6 (Naked Single)
  26. Row 6 / Column 7 → 3 (Naked Single)
  27. Row 6 / Column 5 → 1 (Naked Single)
  28. Row 3 / Column 8 → 3 (Hidden Single)
  29. 2-String Kite: 3 in r5c4,r8c1 (connected by r4c1,r5c2) => r8c4<>3
  30. Discontinuous Nice Loop: 8 r6c2 -8- r1c2 -7- r2c1 -4- r6c1 =4= r6c2 => r6c2<>8
  31. Discontinuous Nice Loop: 7 r9c4 -7- r2c4 =7= r1c5 -7- r4c5 -3- r5c4 =3= r9c4 => r9c4<>7
  32. Discontinuous Nice Loop: 8 r5c2 -8- r5c8 -9- r9c8 -1- r9c4 -3- r5c4 =3= r5c2 => r5c2<>8
  33. Locked Candidates Type 1 (Pointing): 8 in b4 => r3c3<>8
  34. Grouped Discontinuous Nice Loop: 9 r5c2 -9- r4c23 =9= r4c9 =6= r4c1 -6- r6c1 -4- r2c1 -7- r2c4 =7= r1c5 -7- r4c5 -3- r5c4 =3= r5c2 => r5c2<>9
  35. AIC: 4 4- r2c1 =4= r6c1 =6= r6c9 -6- r4c9 -9- r4c2 =9= r3c2 =4= r3c4 -4 => r2c4,r3c2<>4
  36. Row 2 / Column 1 → 4 (Hidden Single)
  37. Row 6 / Column 1 → 6 (Naked Single)
  38. Row 3 / Column 4 → 4 (Hidden Single)
  39. Row 6 / Column 2 → 4 (Hidden Single)
  40. Row 4 / Column 9 → 6 (Hidden Single)
  41. Locked Candidates Type 1 (Pointing): 9 in b6 => r5c3<>9
  42. Naked Pair: 3,7 in r4c15 => r4c2<>3, r4c23<>7
  43. 2-String Kite: 7 in r2c4,r8c9 (connected by r2c7,r3c9) => r8c4<>7
  44. Turbot Fish: 7 r1c2 =7= r3c3 -7- r3c9 =7= r8c9 => r8c2<>7
  45. Empty Rectangle: 7 in b8 (r1c25) => r7c2<>7
  46. Discontinuous Nice Loop: 7 r7c4 -7- r2c4 -8- r2c7 =8= r7c7 =5= r7c2 =2= r7c4 => r7c4<>7
  47. Grouped Discontinuous Nice Loop: 7 r8c7 -7- r8c9 =7= r3c9 -7- r3c3 =7= r1c2 -7- r9c2 =7= r8c13 -7- r8c7 => r8c7<>7
  48. Discontinuous Nice Loop: 1 r7c2 -1- r7c8 =1= r9c8 =9= r9c6 =4= r9c7 -4- r8c7 -5- r7c7 =5= r7c2 => r7c2<>1
  49. Discontinuous Nice Loop: 1 r7c4 -1- r7c8 =1= r9c8 =9= r9c6 =4= r9c7 -4- r8c7 -5- r7c7 =5= r7c2 =2= r7c4 => r7c4<>1
  50. AIC: 8/9 8- r5c8 =8= r7c8 =1= r7c6 =7= r9c5 =5= r8c5 -5- r8c7 -4- r8c6 -9- r8c9 =9= r5c9 -9 => r5c9<>8, r5c8<>9
  51. Row 5 / Column 8 → 8 (Naked Single)
  52. Row 6 / Column 9 → 5 (Naked Single)
  53. Row 5 / Column 9 → 9 (Full House)
  54. Row 6 / Column 3 → 8 (Full House)
  55. Row 7 / Column 8 → 1 (Naked Single)
  56. Row 9 / Column 8 → 9 (Full House)
  57. Row 7 / Column 6 → 7 (Naked Single)
  58. Row 9 / Column 6 → 4 (Naked Single)
  59. Row 5 / Column 6 → 6 (Naked Single)
  60. Row 8 / Column 6 → 9 (Naked Single)
  61. Row 1 / Column 6 → 1 (Full House)
  62. Row 1 / Column 4 → 6 (Naked Single)
  63. Row 8 / Column 7 → 4 (Hidden Single)
  64. X-Wing: 8 r27 c47 => r8c4<>8
  65. W-Wing: 5/3 in r5c2,r9c5 connected by 3 in r4c15 => r9c2<>5
  66. Sashimi Swordfish: 7 r259 c347 fr9c2 => r8c3<>7
  67. XY-Wing: 1/5/2 in r7c2,r8c34 => r7c4,r8c2<>2
  68. Row 7 / Column 4 → 8 (Naked Single)
  69. Row 2 / Column 4 → 7 (Naked Single)
  70. Row 1 / Column 5 → 8 (Full House)
  71. Row 2 / Column 7 → 8 (Full House)
  72. Row 1 / Column 2 → 7 (Full House)
  73. Row 3 / Column 9 → 7 (Full House)
  74. Row 8 / Column 9 → 8 (Full House)
  75. Row 7 / Column 7 → 5 (Naked Single)
  76. Row 7 / Column 2 → 2 (Full House)
  77. Row 9 / Column 7 → 7 (Full House)
  78. Row 5 / Column 4 → 3 (Naked Single)
  79. Row 4 / Column 5 → 7 (Full House)
  80. Row 3 / Column 3 → 9 (Naked Single)
  81. Row 3 / Column 2 → 8 (Full House)
  82. Row 5 / Column 2 → 5 (Naked Single)
  83. Row 5 / Column 3 → 7 (Full House)
  84. Row 9 / Column 4 → 1 (Naked Single)
  85. Row 8 / Column 4 → 2 (Full House)
  86. Row 4 / Column 1 → 3 (Naked Single)
  87. Row 8 / Column 1 → 7 (Full House)
  88. Row 4 / Column 3 → 1 (Naked Single)
  89. Row 4 / Column 2 → 9 (Full House)
  90. Row 8 / Column 3 → 5 (Full House)
  91. Row 9 / Column 2 → 3 (Naked Single)
  92. Row 8 / Column 2 → 1 (Full House)
  93. Row 8 / Column 5 → 3 (Full House)
  94. Row 9 / Column 5 → 5 (Full House)
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