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

This Sudoku Puzzle has 95 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Triple, undefined, Finned Swordfish, Grouped Discontinuous Nice Loop, Discontinuous Nice Loop, Grouped AIC, Hidden Single, Hidden Pair, Hidden Rectangle, Continuous Nice Loop, Sue de Coq, Naked Single, Skyscraper, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 2 in b7 => r456c2<>2
  2. Hidden Triple: 4,6,9 in r5c478 => r5c478<>2, r5c478<>5, r5c47<>8, r5c8<>1
  3. Locked Candidates Type 1 (Pointing): 1 in b6 => r4c2<>1
  4. Finned X-Wing: 9 c58 r49 fr5c8 => r4c9<>9
  5. Finned Swordfish: 4 r258 c347 fr5c8 => r6c7<>4
  6. Grouped Discontinuous Nice Loop: 3 r3c1 -3- r7c1 =3= r79c2 -3- r4c2 -8- r5c2 -1- r5c1 =1= r3c1 => r3c1<>3
  7. Grouped Discontinuous Nice Loop: 4 r5c7 -4- r5c4 -9- r4c45 =9= r4c8 =1= r7c8 =4= r78c7 -4- r5c7 => r5c7<>4
  8. Locked Candidates Type 1 (Pointing): 4 in b6 => r7c8<>4
  9. Discontinuous Nice Loop: 6 r8c7 -6- r5c7 -9- r5c4 -4- r2c4 =4= r2c3 -4- r8c3 =4= r8c7 => r8c7<>6
  10. Finned X-Wing: 6 r28 c49 fr2c7 fr2c8 => r3c9<>6
  11. Grouped Discontinuous Nice Loop: 8 r6c2 -8- r5c123 =8= r5c6 -8- r8c6 -1- r8c9 =1= r4c9 =8= r6c79 -8- r6c2 => r6c2<>8
  12. Grouped Discontinuous Nice Loop: 8 r6c3 -8- r5c123 =8= r5c6 -8- r8c6 -1- r8c9 =1= r4c9 =8= r6c79 -8- r6c3 => r6c3<>8
  13. Grouped Discontinuous Nice Loop: 8 r4c9 -8- r4c2 -3- r4c456 =3= r6c5 =8= r6c79 -8- r4c9 => r4c9<>8
  14. Locked Candidates Type 1 (Pointing): 8 in b6 => r6c5<>8
  15. Grouped Discontinuous Nice Loop: 8 r7c2 -8- r4c2 -3- r4c456 =3= r6c5 =4= r3c5 -4- r3c2 =4= r7c2 => r7c2<>8
  16. Grouped Discontinuous Nice Loop: 7 r7c8 -7- r12c8 =7= r2c9 =6= r8c9 =1= r7c8 => r7c8<>7
  17. Grouped Discontinuous Nice Loop: 8 r9c2 -8- r4c2 -3- r4c456 =3= r6c5 =4= r3c5 -4- r3c2 =4= r7c2 =2= r9c2 => r9c2<>8
  18. Grouped AIC: 1 1- r4c9 -2- r6c789 =2= r6c3 =3= r46c2 -3- r79c2 =3= r7c1 =8= r8c13 -8- r8c6 -1- r8c9 =1= r7c8 -1 => r4c8,r8c9<>1
  19. Row 4 / Column 9 → 1 (Hidden Single)
  20. Row 7 / Column 8 → 1 (Hidden Single)
  21. Row 8 / Column 6 → 1 (Hidden Single)
  22. Hidden Pair: 2,4 in r7c27 => r7c2<>3, r7c2<>7, r7c7<>6, r7c7<>8
  23. Row 8 / Column 9 → 6 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 7 in b9 => r9c24<>7
  25. W-Wing: 8/3 in r4c2,r7c6 connected by 3 in r7c1,r9c2 => r4c6<>8
  26. Hidden Rectangle: 7/8 in r7c14,r8c14 => r7c4<>8
  27. Continuous Nice Loop: 4/8/9 9= r8c7 =4= r8c3 -4- r2c3 =4= r2c4 -4- r5c4 -9- r8c4 =9= r8c7 =4 => r3c34<>4, r8c7<>8, r49c4<>9
  28. Locked Candidates Type 1 (Pointing): 8 in b9 => r9c45<>8
  29. Hidden Rectangle: 2/8 in r6c79,r9c79 => r9c7<>2
  30. Discontinuous Nice Loop: 6 r1c5 -6- r1c2 =6= r3c2 =4= r3c5 -4- r6c5 =4= r5c4 =9= r8c4 =7= r7c4 =6= r7c5 -6- r1c5 => r1c5<>6
  31. Discontinuous Nice Loop: 3 r2c3 -3- r2c1 =3= r7c1 -3- r9c2 -2- r7c2 -4- r3c2 =4= r2c3 => r2c3<>3
  32. Discontinuous Nice Loop: 5 r2c3 -5- r3c3 -3- r2c1 =3= r7c1 -3- r9c2 -2- r7c2 -4- r3c2 =4= r2c3 => r2c3<>5
  33. Discontinuous Nice Loop: 3 r3c5 -3- r3c7 =3= r2c7 -3- r2c1 =3= r7c1 -3- r9c2 -2- r7c2 -4- r3c2 =4= r3c5 => r3c5<>3
  34. Discontinuous Nice Loop: 2 r3c7 -2- r7c7 =2= r7c2 -2- r9c2 -3- r7c1 =3= r2c1 -3- r2c7 =3= r3c7 => r3c7<>2
  35. Discontinuous Nice Loop: 5 r3c5 -5- r3c3 -3- r2c1 =3= r7c1 -3- r9c2 -2- r7c2 -4- r3c2 =4= r3c5 => r3c5<>5
  36. Sue de Coq: r123c4 - {234568} (r49c4 - {2358}, r3c5 - {46}) => r7c4<>3, r8c4<>8
  37. Locked Candidates Type 1 (Pointing): 8 in b8 => r7c1<>8
  38. Discontinuous Nice Loop: 8 r4c5 -8- r4c2 -3- r9c2 =3= r7c1 =7= r7c4 -7- r8c4 -9- r5c4 =9= r4c5 => r4c5<>8
  39. W-Wing: 3/8 in r4c2,r7c6 connected by 8 in r4c4,r5c6 => r4c6<>3
  40. X-Wing: 3 c16 r27 => r2c47,r7c5<>3
  41. Row 3 / Column 7 → 3 (Hidden Single)
  42. Row 3 / Column 3 → 5 (Naked Single)
  43. Row 3 / Column 1 → 1 (Naked Single)
  44. Row 3 / Column 9 → 9 (Hidden Single)
  45. Row 5 / Column 1 → 5 (Hidden Single)
  46. Row 5 / Column 2 → 1 (Hidden Single)
  47. Row 3 / Column 4 → 2 (Hidden Single)
  48. Skyscraper: 5 in r4c6,r6c7 (connected by r2c67) => r4c8,r6c5<>5
  49. Finned X-Wing: 8 c24 r14 fr2c4 => r1c5<>8
  50. Row 7 / Column 5 → 8 (Hidden Single)
  51. Row 7 / Column 6 → 3 (Naked Single)
  52. Row 7 / Column 1 → 7 (Naked Single)
  53. Row 9 / Column 4 → 5 (Naked Single)
  54. Row 7 / Column 4 → 6 (Naked Single)
  55. Row 8 / Column 1 → 8 (Naked Single)
  56. Row 2 / Column 1 → 3 (Full House)
  57. Row 9 / Column 5 → 9 (Naked Single)
  58. Row 8 / Column 4 → 7 (Full House)
  59. Row 8 / Column 3 → 4 (Naked Single)
  60. Row 8 / Column 7 → 9 (Full House)
  61. Row 9 / Column 7 → 8 (Naked Single)
  62. Row 7 / Column 2 → 2 (Naked Single)
  63. Row 7 / Column 7 → 4 (Full House)
  64. Row 9 / Column 2 → 3 (Full House)
  65. Row 5 / Column 7 → 6 (Naked Single)
  66. Row 4 / Column 2 → 8 (Naked Single)
  67. Row 6 / Column 2 → 7 (Naked Single)
  68. Row 4 / Column 4 → 3 (Naked Single)
  69. Row 5 / Column 3 → 2 (Naked Single)
  70. Row 6 / Column 3 → 3 (Full House)
  71. Row 1 / Column 2 → 6 (Naked Single)
  72. Row 3 / Column 2 → 4 (Full House)
  73. Row 3 / Column 5 → 6 (Full House)
  74. Row 1 / Column 4 → 8 (Naked Single)
  75. Row 4 / Column 5 → 5 (Naked Single)
  76. Row 6 / Column 5 → 4 (Naked Single)
  77. Row 1 / Column 5 → 3 (Full House)
  78. Row 5 / Column 6 → 8 (Naked Single)
  79. Row 1 / Column 3 → 7 (Naked Single)
  80. Row 1 / Column 8 → 5 (Full House)
  81. Row 2 / Column 3 → 8 (Full House)
  82. Row 2 / Column 4 → 4 (Naked Single)
  83. Row 2 / Column 6 → 5 (Full House)
  84. Row 4 / Column 6 → 2 (Full House)
  85. Row 5 / Column 4 → 9 (Full House)
  86. Row 4 / Column 8 → 9 (Full House)
  87. Row 5 / Column 8 → 4 (Full House)
  88. Row 2 / Column 7 → 2 (Naked Single)
  89. Row 6 / Column 7 → 5 (Full House)
  90. Row 6 / Column 8 → 2 (Naked Single)
  91. Row 6 / Column 9 → 8 (Full House)
  92. Row 2 / Column 9 → 7 (Naked Single)
  93. Row 2 / Column 8 → 6 (Full House)
  94. Row 9 / Column 8 → 7 (Full House)
  95. Row 9 / Column 9 → 2 (Full House)
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