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

This Sudoku Puzzle has 76 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Swordfish, Empty Rectangle, Naked Single, Hidden Rectangle, undefined, Finned Jellyfish, Locked Candidates Type 2 (Claiming), AIC, Skyscraper, Full House techniques.

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

Solution Steps:

  1. Row 1 / Column 2 → 3 (Hidden Single)
  2. Row 3 / Column 5 → 3 (Hidden Single)
  3. Row 3 / Column 6 → 1 (Hidden Single)
  4. Row 4 / Column 4 → 1 (Hidden Single)
  5. Row 1 / Column 6 → 9 (Hidden Single)
  6. Row 7 / Column 5 → 1 (Hidden Single)
  7. Row 8 / Column 7 → 1 (Hidden Single)
  8. Row 5 / Column 9 → 1 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 4 in b2 => r2c28<>4
  10. Row 7 / Column 2 → 4 (Hidden Single)
  11. Row 3 / Column 8 → 4 (Hidden Single)
  12. Row 2 / Column 6 → 4 (Hidden Single)
  13. Row 9 / Column 4 → 4 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 8 in b4 => r5c456<>8
  15. Naked Triple: 5,7,9 in r4c12,r6c2 => r5c13<>5, r5c13<>7, r5c13<>9
  16. Locked Candidates Type 1 (Pointing): 9 in b4 => r4c8<>9
  17. Swordfish: 2 r139 c157 => r25c5,r7c17<>2
  18. Empty Rectangle: 5 in b4 (r2c28) => r4c8<>5
  19. Row 4 / Column 8 → 6 (Naked Single)
  20. Row 6 / Column 6 → 6 (Hidden Single)
  21. Row 6 / Column 4 → 8 (Hidden Single)
  22. Row 5 / Column 4 → 3 (Hidden Single)
  23. Row 5 / Column 6 → 2 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 8 in b2 => r9c5<>8
  25. Hidden Rectangle: 3/5 in r6c89,r7c89 => r7c9<>5
  26. Finned X-Wing: 5 r26 c28 fr6c9 => r5c8<>5
  27. Row 5 / Column 8 → 9 (Naked Single)
  28. Finned Jellyfish: 7 r1356 c2579 fr1c1 fr1c3 fr3c1 fr3c3 => r2c2<>7
  29. Locked Candidates Type 2 (Claiming): 7 in r2 => r1c5<>7
  30. XY-Chain: 5 5- r2c2 -2- r2c4 -7- r2c5 -8- r1c5 -2- r9c5 -5- r5c5 -7- r4c6 -5 => r4c2<>5
  31. 2-String Kite: 5 in r4c1,r9c5 (connected by r4c6,r5c5) => r9c1<>5
  32. AIC: 2/5 5- r2c8 =5= r2c2 -5- r6c2 =5= r4c1 -5- r4c6 =5= r5c5 -5- r9c5 -2- r7c4 =2= r7c8 -2 => r2c8<>2, r7c8<>5
  33. Locked Candidates Type 1 (Pointing): 2 in b3 => r9c7<>2
  34. AIC: 3 3- r6c8 -5- r2c8 =5= r2c2 =2= r2c4 -2- r7c4 =2= r7c8 =3= r7c9 -3 => r6c9,r7c8<>3
  35. Row 6 / Column 8 → 3 (Hidden Single)
  36. Row 7 / Column 9 → 3 (Hidden Single)
  37. Skyscraper: 5 in r2c8,r6c9 (connected by r26c2) => r1c9<>5
  38. Skyscraper: 5 in r5c5,r6c9 (connected by r9c59) => r5c7<>5
  39. Row 5 / Column 7 → 7 (Naked Single)
  40. Row 6 / Column 9 → 5 (Full House)
  41. Row 6 / Column 2 → 7 (Full House)
  42. Row 5 / Column 5 → 5 (Naked Single)
  43. Row 4 / Column 6 → 7 (Full House)
  44. Row 4 / Column 2 → 9 (Naked Single)
  45. Row 4 / Column 1 → 5 (Full House)
  46. Row 9 / Column 5 → 2 (Naked Single)
  47. Row 1 / Column 5 → 8 (Naked Single)
  48. Row 2 / Column 5 → 7 (Full House)
  49. Row 2 / Column 4 → 2 (Full House)
  50. Row 1 / Column 9 → 7 (Naked Single)
  51. Row 2 / Column 2 → 5 (Naked Single)
  52. Row 2 / Column 8 → 8 (Full House)
  53. Row 8 / Column 2 → 2 (Full House)
  54. Row 3 / Column 9 → 6 (Naked Single)
  55. Row 9 / Column 9 → 8 (Full House)
  56. Row 1 / Column 3 → 4 (Naked Single)
  57. Row 7 / Column 8 → 2 (Naked Single)
  58. Row 8 / Column 8 → 5 (Full House)
  59. Row 3 / Column 7 → 2 (Naked Single)
  60. Row 1 / Column 7 → 5 (Full House)
  61. Row 1 / Column 1 → 2 (Full House)
  62. Row 9 / Column 1 → 9 (Naked Single)
  63. Row 5 / Column 3 → 8 (Naked Single)
  64. Row 5 / Column 1 → 4 (Full House)
  65. Row 8 / Column 6 → 8 (Naked Single)
  66. Row 7 / Column 6 → 5 (Full House)
  67. Row 3 / Column 1 → 7 (Naked Single)
  68. Row 3 / Column 3 → 9 (Full House)
  69. Row 7 / Column 1 → 8 (Full House)
  70. Row 9 / Column 7 → 6 (Naked Single)
  71. Row 7 / Column 7 → 9 (Full House)
  72. Row 9 / Column 3 → 5 (Full House)
  73. Row 8 / Column 3 → 7 (Naked Single)
  74. Row 7 / Column 3 → 6 (Full House)
  75. Row 7 / Column 4 → 7 (Full House)
  76. Row 8 / Column 4 → 9 (Full House)
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