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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, Turbot Fish, undefined, Locked Pair, Naked Single, Skyscraper, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 8 → 5 (Hidden Single)
  2. Row 5 / Column 9 → 5 (Hidden Single)
  3. Row 8 / Column 8 → 1 (Hidden Single)
  4. Row 9 / Column 4 → 3 (Hidden Single)
  5. Row 2 / Column 7 → 1 (Hidden Single)
  6. Row 9 / Column 9 → 6 (Hidden Single)
  7. Row 9 / Column 8 → 8 (Hidden Single)
  8. Row 2 / Column 6 → 7 (Hidden Single)
  9. Row 8 / Column 5 → 7 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 2 in b8 => r13456c5<>2
  11. Locked Candidates Type 1 (Pointing): 2 in b2 => r46c4<>2
  12. Locked Candidates Type 2 (Claiming): 3 in c2 => r456c3,r56c1<>3
  13. Naked Triple: 4,7,9 in r8c2,r9c13 => r7c1<>4, r7c13<>7, r7c3<>9
  14. Locked Candidates Type 1 (Pointing): 7 in b7 => r9c7<>7
  15. Hidden Pair: 6,8 in r3c35 => r3c3<>3, r3c5<>9
  16. Locked Candidates Type 1 (Pointing): 9 in b2 => r1c79<>9
  17. Hidden Pair: 1,5 in r4c35 => r4c35<>6, r4c3<>7, r4c35<>9
  18. Locked Candidates Type 1 (Pointing): 7 in b4 => r6c8<>7
  19. Turbot Fish: 4 r6c4 =4= r8c4 -4- r8c2 =4= r9c1 => r6c1<>4
  20. W-Wing: 9/8 in r1c5,r8c6 connected by 8 in r5c56 => r79c5<>9
  21. Locked Pair: 2,4 in r79c5 => r56c5,r8c4<>4
  22. Row 6 / Column 4 → 4 (Hidden Single)
  23. Row 8 / Column 2 → 4 (Hidden Single)
  24. Row 9 / Column 1 → 7 (Naked Single)
  25. Row 9 / Column 3 → 9 (Naked Single)
  26. Row 5 / Column 1 → 4 (Hidden Single)
  27. Row 6 / Column 3 → 7 (Hidden Single)
  28. Row 1 / Column 1 → 1 (Hidden Single)
  29. Skyscraper: 6 in r2c4,r6c5 (connected by r26c2) => r3c5,r4c4<>6
  30. Row 3 / Column 5 → 8 (Naked Single)
  31. Row 4 / Column 4 → 9 (Naked Single)
  32. Row 1 / Column 5 → 9 (Naked Single)
  33. Row 3 / Column 3 → 6 (Naked Single)
  34. Row 1 / Column 4 → 2 (Naked Single)
  35. Row 2 / Column 4 → 6 (Full House)
  36. Row 8 / Column 4 → 8 (Full House)
  37. Row 2 / Column 2 → 2 (Full House)
  38. Row 8 / Column 6 → 9 (Full House)
  39. Row 5 / Column 3 → 1 (Naked Single)
  40. Row 1 / Column 9 → 7 (Naked Single)
  41. Row 3 / Column 1 → 3 (Naked Single)
  42. Row 1 / Column 3 → 8 (Full House)
  43. Row 1 / Column 7 → 3 (Full House)
  44. Row 4 / Column 3 → 5 (Naked Single)
  45. Row 7 / Column 3 → 3 (Full House)
  46. Row 7 / Column 1 → 5 (Full House)
  47. Row 6 / Column 1 → 2 (Full House)
  48. Row 5 / Column 5 → 6 (Naked Single)
  49. Row 4 / Column 5 → 1 (Naked Single)
  50. Row 6 / Column 6 → 3 (Naked Single)
  51. Row 6 / Column 5 → 5 (Naked Single)
  52. Row 4 / Column 6 → 2 (Naked Single)
  53. Row 5 / Column 6 → 8 (Full House)
  54. Row 6 / Column 8 → 9 (Naked Single)
  55. Row 6 / Column 2 → 6 (Full House)
  56. Row 5 / Column 7 → 2 (Naked Single)
  57. Row 4 / Column 2 → 3 (Naked Single)
  58. Row 5 / Column 2 → 9 (Full House)
  59. Row 5 / Column 8 → 3 (Full House)
  60. Row 9 / Column 7 → 4 (Naked Single)
  61. Row 9 / Column 5 → 2 (Full House)
  62. Row 7 / Column 5 → 4 (Full House)
  63. Row 4 / Column 8 → 7 (Naked Single)
  64. Row 4 / Column 7 → 6 (Full House)
  65. Row 3 / Column 7 → 9 (Naked Single)
  66. Row 7 / Column 7 → 7 (Full House)
  67. Row 7 / Column 8 → 2 (Naked Single)
  68. Row 3 / Column 8 → 4 (Full House)
  69. Row 3 / Column 9 → 2 (Full House)
  70. Row 7 / Column 9 → 9 (Full House)
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