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

This Sudoku Puzzle has 86 steps and it is solved using Locked Triple, Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Hidden Pair, Skyscraper, undefined, Hidden Rectangle, Finned Swordfish, Sashimi Swordfish, Full House, Swordfish, Uniqueness Test 6 techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Locked Triple: 1,3,6 in r123c8 => r13c9,r2c7,r579c8<>1, r1c9,r2c7,r57c8<>3, r2c7<>6
  2. Row 2 / Column 7 → 2 (Naked Single)
  3. Row 7 / Column 7 → 3 (Hidden Single)
  4. Row 3 / Column 1 → 2 (Hidden Single)
  5. Row 3 / Column 9 → 7 (Hidden Single)
  6. Row 1 / Column 9 → 9 (Naked Single)
  7. Row 7 / Column 1 → 7 (Hidden Single)
  8. Row 1 / Column 2 → 7 (Hidden Single)
  9. Row 9 / Column 4 → 7 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 4 in b1 => r79c3<>4
  11. Locked Candidates Type 2 (Claiming): 9 in r7 => r8c45,r9c6<>9
  12. Naked Pair: 5,8 in r6c49 => r6c25<>5, r6c25<>8
  13. Row 6 / Column 5 → 7 (Naked Single)
  14. Row 4 / Column 7 → 7 (Hidden Single)
  15. Row 6 / Column 7 → 6 (Hidden Single)
  16. Row 6 / Column 2 → 4 (Naked Single)
  17. Row 8 / Column 1 → 4 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 9 in b7 => r45c2<>9
  19. Naked Triple: 1,5,8 in r2c125 => r2c48<>1, r2c4<>5, r2c4<>8
  20. Hidden Pair: 2,6 in r8c4,r9c6 => r8c4<>1, r8c4<>5, r9c6<>4
  21. Locked Candidates Type 1 (Pointing): 4 in b8 => r7c8<>4
  22. Skyscraper: 5 in r6c4,r8c5 (connected by r68c9) => r4c5,r7c4<>5
  23. 2-String Kite: 8 in r1c3,r4c5 (connected by r1c4,r2c5) => r4c3<>8
  24. Hidden Rectangle: 1/9 in r8c27,r9c27 => r9c2<>1
  25. Finned X-Wing: 8 c15 r24 fr5c1 => r4c2<>8
  26. Sashimi X-Wing: 5 c34 r34 fr5c4 fr6c4 => r4c6<>5
  27. Finned Swordfish: 5 r248 c259 fr4c3 => r5c2<>5
  28. Locked Candidates Type 1 (Pointing): 5 in b4 => r4c9<>5
  29. Naked Triple: 1,8,9 in r45c1,r5c2 => r4c23<>1
  30. Sashimi Swordfish: 8 r167 c348 fr6c9 => r5c8<>8
  31. Locked Candidates Type 1 (Pointing): 8 in b6 => r9c9<>8
  32. XYZ-Wing: 1/2/5 in r8c59,r9c9 => r8c7<>1
  33. Row 8 / Column 7 → 9 (Naked Single)
  34. Row 9 / Column 2 → 9 (Hidden Single)
  35. Locked Candidates Type 1 (Pointing): 8 in b7 => r1c3<>8
  36. Row 1 / Column 4 → 8 (Hidden Single)
  37. Row 6 / Column 4 → 5 (Naked Single)
  38. Row 6 / Column 9 → 8 (Full House)
  39. Row 4 / Column 5 → 8 (Hidden Single)
  40. Naked Pair: 1,5 in r28c5 => r37c5<>1, r37c5<>5
  41. Swordfish: 1 r137 c348 => r9c3<>1
  42. Locked Candidates Type 2 (Claiming): 1 in r9 => r8c9<>1
  43. XY-Wing: 3/4/9 in r14c6,r3c5 => r3c6<>9
  44. Uniqueness Test 6: 1/8 in r2c12,r5c12 => r2c2,r5c1<>8
  45. Row 2 / Column 1 → 8 (Hidden Single)
  46. Row 5 / Column 2 → 8 (Hidden Single)
  47. XY-Chain: 9 9- r4c6 -3- r1c6 -4- r1c3 -1- r7c3 -8- r7c8 -5- r5c8 -4- r5c7 -1- r5c1 -9 => r4c1,r5c46<>9
  48. Row 4 / Column 1 → 1 (Naked Single)
  49. Row 5 / Column 1 → 9 (Full House)
  50. Row 4 / Column 9 → 3 (Naked Single)
  51. Row 4 / Column 6 → 9 (Naked Single)
  52. Naked Triple: 2,3,6 in r258c4 => r3c4<>6
  53. XY-Chain: 1 1- r2c2 -5- r2c5 -1- r8c5 -5- r7c6 -4- r1c6 -3- r5c6 -2- r9c6 -6- r9c3 -8- r7c3 -1 => r13c3,r8c2<>1
  54. Row 1 / Column 3 → 4 (Naked Single)
  55. Row 8 / Column 2 → 6 (Naked Single)
  56. Row 1 / Column 6 → 3 (Naked Single)
  57. Row 1 / Column 8 → 1 (Full House)
  58. Row 3 / Column 3 → 5 (Naked Single)
  59. Row 2 / Column 2 → 1 (Full House)
  60. Row 4 / Column 2 → 5 (Full House)
  61. Row 4 / Column 3 → 6 (Full House)
  62. Row 8 / Column 4 → 2 (Naked Single)
  63. Row 9 / Column 3 → 8 (Naked Single)
  64. Row 7 / Column 3 → 1 (Full House)
  65. Row 2 / Column 4 → 6 (Naked Single)
  66. Row 5 / Column 6 → 2 (Naked Single)
  67. Row 5 / Column 4 → 3 (Full House)
  68. Row 3 / Column 8 → 6 (Naked Single)
  69. Row 2 / Column 8 → 3 (Full House)
  70. Row 2 / Column 5 → 5 (Full House)
  71. Row 8 / Column 9 → 5 (Naked Single)
  72. Row 8 / Column 5 → 1 (Full House)
  73. Row 9 / Column 6 → 6 (Naked Single)
  74. Row 9 / Column 8 → 4 (Naked Single)
  75. Row 7 / Column 4 → 9 (Naked Single)
  76. Row 3 / Column 4 → 1 (Full House)
  77. Row 3 / Column 6 → 4 (Naked Single)
  78. Row 3 / Column 5 → 9 (Full House)
  79. Row 7 / Column 5 → 4 (Full House)
  80. Row 7 / Column 6 → 5 (Full House)
  81. Row 7 / Column 8 → 8 (Full House)
  82. Row 5 / Column 8 → 5 (Full House)
  83. Row 5 / Column 9 → 1 (Naked Single)
  84. Row 5 / Column 7 → 4 (Full House)
  85. Row 9 / Column 7 → 1 (Full House)
  86. Row 9 / Column 9 → 2 (Full House)
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