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

This Sudoku Puzzle has 94 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Triple, Discontinuous Nice Loop, Grouped Continuous Nice Loop, Naked Single, Simple Colors Trap, AIC, Hidden Pair, Finned Swordfish, Sue de Coq, Grouped Discontinuous Nice Loop, undefined, Hidden Single, Locked Candidates Type 2 (Claiming), Continuous Nice Loop, Naked Pair, Swordfish, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 1 in b1 => r1c789<>1
  2. Locked Candidates Type 1 (Pointing): 5 in b9 => r9c23<>5
  3. Naked Triple: 4,6,8 in r569c1 => r37c1<>6, r37c1<>8, r7c1<>4
  4. Discontinuous Nice Loop: 1 r7c5 -1- r8c4 -9- r3c4 =9= r3c5 =4= r7c5 => r7c5<>1
  5. Grouped Continuous Nice Loop: 2/4/6/8 8= r5c9 =1= r7c9 =6= r79c8 -6- r2c8 =6= r2c5 -6- r4c5 =6= r4c23 -6- r6c1 -8- r6c7 =8= r5c9 =1 => r57c9<>2, r5c9<>4, r13c8,r36c5,r6c3<>6, r6c3<>8
  6. Row 6 / Column 3 → 9 (Naked Single)
  7. Simple Colors Trap: 6 (r2c5,r6c4,r9c1) / (r2c8,r4c5,r6c1) => r9c8<>6
  8. Locked Candidates Type 1 (Pointing): 6 in b9 => r7c23<>6
  9. AIC: 1 1- r2c8 -6- r7c8 =6= r7c9 =1= r5c9 -1 => r56c8<>1
  10. Hidden Pair: 1,8 in r5c9,r6c7 => r6c7<>2, r6c7<>7
  11. Finned Swordfish: 7 r168 c258 fr1c7 => r3c8<>7
  12. Sue de Coq: r79c8 - {12569} (r1356c8 - {24579}, r7c9 - {16}) => r79c7<>1
  13. Discontinuous Nice Loop: 2 r3c7 -2- r3c9 =2= r4c9 =4= r5c8 =9= r4c7 -9- r7c7 -2- r3c7 => r3c7<>2
  14. Discontinuous Nice Loop: 6 r3c9 -6- r2c8 =6= r2c5 -6- r4c5 =6= r6c4 =2= r6c8 -2- r3c8 =2= r3c9 => r3c9<>6
  15. Discontinuous Nice Loop: 7 r4c5 -7- r4c7 =7= r6c8 =2= r6c4 =6= r4c5 => r4c5<>7
  16. Discontinuous Nice Loop: 9 r5c4 -9- r5c8 =9= r4c7 =7= r4c6 -7- r6c5 -1- r6c7 =1= r2c7 =3= r2c6 -3- r5c6 =3= r5c4 => r5c4<>9
  17. Grouped Discontinuous Nice Loop: 3 r1c6 =5= r3c5 =4= r7c5 =8= r23c5 -8- r2c6 -3- r1c6 => r1c6<>3
  18. Discontinuous Nice Loop: 5 r1c8 -5- r1c6 -8- r2c5 -6- r4c5 =6= r6c4 =2= r6c8 =7= r1c8 => r1c8<>5
  19. XY-Wing: 2/7/4 in r16c8,r4c9 => r13c9,r5c8<>4
  20. Row 4 / Column 9 → 4 (Hidden Single)
  21. Row 5 / Column 1 → 4 (Hidden Single)
  22. Row 3 / Column 9 → 2 (Hidden Single)
  23. XY-Chain: 1 1- r7c9 -6- r1c9 -8- r5c9 -1- r6c7 -8- r6c1 -6- r4c3 -5- r8c3 -1 => r7c23<>1
  24. Locked Candidates Type 2 (Claiming): 1 in r7 => r9c8<>1
  25. Naked Triple: 2,5,9 in r79c7,r9c8 => r7c8<>2, r7c8<>9
  26. Continuous Nice Loop: 1/6/7/9 6= r6c4 =2= r6c8 =7= r6c5 -7- r8c5 =7= r8c2 =5= r8c3 -5- r4c3 -6- r4c5 =6= r6c4 =2 => r6c4,r8c2<>1, r4c2<>6, r7c5<>7, r8c2<>9
  27. Locked Candidates Type 2 (Claiming): 9 in r8 => r7c56,r9c46<>9
  28. Locked Candidates Type 2 (Claiming): 9 in c6 => r45c5<>9
  29. Naked Pair: 5,6 in r4c35 => r4c26<>5
  30. Row 4 / Column 2 → 2 (Naked Single)
  31. Locked Candidates Type 1 (Pointing): 2 in b6 => r9c8<>2
  32. Naked Triple: 1,5,8 in r5c259 => r5c4<>1, r5c6<>5
  33. Row 1 / Column 6 → 5 (Hidden Single)
  34. Locked Candidates Type 1 (Pointing): 1 in b5 => r8c5<>1
  35. XY-Chain: 4 4- r3c8 -5- r9c8 -9- r5c8 -2- r6c8 -7- r6c5 -1- r5c5 -5- r4c5 -6- r2c5 -8- r7c5 -4 => r3c5<>4
  36. Row 7 / Column 5 → 4 (Hidden Single)
  37. Row 9 / Column 3 → 4 (Hidden Single)
  38. Locked Candidates Type 1 (Pointing): 8 in b8 => r2c6<>8
  39. Row 2 / Column 6 → 3 (Naked Single)
  40. Row 5 / Column 4 → 3 (Hidden Single)
  41. Naked Pair: 1,8 in r26c7 => r13c7<>8
  42. W-Wing: 2/9 in r5c6,r7c7 connected by 9 in r4c67 => r7c6<>2
  43. Row 7 / Column 7 → 2 (Hidden Single)
  44. Row 7 / Column 2 → 9 (Hidden Single)
  45. Finned X-Wing: 8 r15 c29 fr1c3 => r3c2<>8
  46. Finned Swordfish: 6 r369 c124 fr3c3 => r1c2<>6
  47. XY-Chain: 6 6- r1c4 -4- r1c8 -7- r6c8 -2- r6c4 -6- r6c1 -8- r5c2 -5- r8c2 -7- r3c2 -6 => r1c3,r3c4<>6
  48. XY-Chain: 3 3- r1c7 -7- r4c7 -9- r4c6 -7- r7c6 -8- r7c3 -3- r7c1 -7- r3c1 -3 => r1c3,r3c7<>3
  49. Row 1 / Column 7 → 3 (Hidden Single)
  50. Swordfish: 7 r168 c258 => r3c2<>7
  51. Row 3 / Column 2 → 6 (Naked Single)
  52. Row 4 / Column 3 → 6 (Hidden Single)
  53. Row 4 / Column 5 → 5 (Naked Single)
  54. Row 6 / Column 1 → 8 (Naked Single)
  55. Row 5 / Column 2 → 5 (Full House)
  56. Row 5 / Column 5 → 1 (Naked Single)
  57. Row 6 / Column 7 → 1 (Naked Single)
  58. Row 9 / Column 1 → 6 (Naked Single)
  59. Row 8 / Column 2 → 7 (Naked Single)
  60. Row 5 / Column 9 → 8 (Naked Single)
  61. Row 6 / Column 5 → 7 (Naked Single)
  62. Row 2 / Column 7 → 8 (Naked Single)
  63. Row 7 / Column 1 → 3 (Naked Single)
  64. Row 3 / Column 1 → 7 (Full House)
  65. Row 8 / Column 5 → 9 (Naked Single)
  66. Row 1 / Column 9 → 6 (Naked Single)
  67. Row 7 / Column 9 → 1 (Full House)
  68. Row 4 / Column 6 → 9 (Naked Single)
  69. Row 4 / Column 7 → 7 (Full House)
  70. Row 6 / Column 8 → 2 (Naked Single)
  71. Row 5 / Column 8 → 9 (Full House)
  72. Row 5 / Column 6 → 2 (Full House)
  73. Row 6 / Column 4 → 6 (Full House)
  74. Row 2 / Column 5 → 6 (Naked Single)
  75. Row 3 / Column 5 → 8 (Full House)
  76. Row 2 / Column 8 → 1 (Full House)
  77. Row 7 / Column 3 → 8 (Naked Single)
  78. Row 3 / Column 7 → 5 (Naked Single)
  79. Row 9 / Column 7 → 9 (Full House)
  80. Row 8 / Column 4 → 1 (Naked Single)
  81. Row 8 / Column 3 → 5 (Full House)
  82. Row 9 / Column 2 → 1 (Full House)
  83. Row 1 / Column 2 → 8 (Full House)
  84. Row 1 / Column 4 → 4 (Naked Single)
  85. Row 3 / Column 4 → 9 (Full House)
  86. Row 9 / Column 4 → 2 (Full House)
  87. Row 7 / Column 8 → 6 (Naked Single)
  88. Row 9 / Column 8 → 5 (Full House)
  89. Row 9 / Column 6 → 8 (Full House)
  90. Row 7 / Column 6 → 7 (Full House)
  91. Row 3 / Column 3 → 3 (Naked Single)
  92. Row 1 / Column 3 → 1 (Full House)
  93. Row 3 / Column 8 → 4 (Full House)
  94. Row 1 / Column 8 → 7 (Full House)
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