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

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

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 5 → 3 (Hidden Single)
  2. Row 4 / Column 2 → 3 (Hidden Single)
  3. Row 7 / Column 2 → 5 (Hidden Single)
  4. Row 8 / Column 9 → 3 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 8 in b5 => r4c79<>8
  6. Locked Pair: 7,9 in r45c9 => r2c9,r4c7,r5c8<>7, r269c9,r46c7,r56c8<>9
  7. Locked Candidates Type 1 (Pointing): 4 in b7 => r23c3<>4
  8. Row 3 / Column 4 → 4 (Hidden Single)
  9. Row 5 / Column 5 → 4 (Hidden Single)
  10. Row 3 / Column 6 → 3 (Hidden Single)
  11. Row 9 / Column 4 → 3 (Hidden Single)
  12. Row 4 / Column 5 → 2 (Hidden Single)
  13. Row 4 / Column 7 → 1 (Naked Single)
  14. Row 4 / Column 4 → 8 (Hidden Single)
  15. Row 5 / Column 2 → 1 (Hidden Single)
  16. Row 3 / Column 2 → 7 (Naked Single)
  17. Row 3 / Column 8 → 8 (Naked Single)
  18. Row 3 / Column 3 → 1 (Full House)
  19. Row 5 / Column 8 → 2 (Hidden Single)
  20. Row 5 / Column 9 → 7 (Hidden Single)
  21. Row 4 / Column 9 → 9 (Naked Single)
  22. Row 4 / Column 1 → 6 (Naked Single)
  23. Row 4 / Column 3 → 7 (Full House)
  24. Row 2 / Column 3 → 8 (Hidden Single)
  25. Row 8 / Column 1 → 1 (Hidden Single)
  26. Row 9 / Column 8 → 1 (Hidden Single)
  27. Row 6 / Column 8 → 6 (Hidden Single)
  28. Locked Candidates Type 1 (Pointing): 6 in b1 => r9c2<>6
  29. Naked Triple: 5,7,9 in r78c8,r8c7 => r7c7<>7, r79c7<>9
  30. Hidden Pair: 2,4 in r7c37 => r7c3<>9, r7c7<>8
  31. Locked Candidates Type 1 (Pointing): 8 in b9 => r9c6<>8
  32. Naked Pair: 6,9 in r59c6 => r1c6<>6, r7c6<>9
  33. XYZ-Wing: 6/7/8 in r1c56,r8c5 => r2c5<>7
  34. Row 2 / Column 7 → 7 (Hidden Single)
  35. Locked Candidates Type 1 (Pointing): 9 in b3 => r1c12<>9
  36. Naked Triple: 1,5,6 in r12c4,r2c5 => r1c5<>6
  37. W-Wing: 9/6 in r2c2,r8c3 connected by 6 in r28c5 => r9c2<>9
  38. Row 9 / Column 2 → 2 (Naked Single)
  39. Row 1 / Column 2 → 6 (Naked Single)
  40. Row 2 / Column 2 → 9 (Full House)
  41. Row 7 / Column 3 → 4 (Naked Single)
  42. Row 1 / Column 4 → 5 (Naked Single)
  43. Row 2 / Column 1 → 4 (Naked Single)
  44. Row 1 / Column 1 → 2 (Full House)
  45. Row 6 / Column 1 → 9 (Full House)
  46. Row 6 / Column 3 → 2 (Full House)
  47. Row 7 / Column 7 → 2 (Naked Single)
  48. Row 1 / Column 8 → 9 (Naked Single)
  49. Row 2 / Column 9 → 5 (Naked Single)
  50. Row 1 / Column 7 → 4 (Full House)
  51. Row 7 / Column 8 → 7 (Naked Single)
  52. Row 8 / Column 8 → 5 (Full House)
  53. Row 6 / Column 9 → 8 (Naked Single)
  54. Row 6 / Column 7 → 5 (Full House)
  55. Row 9 / Column 9 → 4 (Full House)
  56. Row 9 / Column 7 → 8 (Naked Single)
  57. Row 8 / Column 7 → 9 (Full House)
  58. Row 7 / Column 6 → 8 (Naked Single)
  59. Row 8 / Column 3 → 6 (Naked Single)
  60. Row 8 / Column 5 → 7 (Full House)
  61. Row 9 / Column 3 → 9 (Full House)
  62. Row 9 / Column 6 → 6 (Full House)
  63. Row 1 / Column 6 → 7 (Naked Single)
  64. Row 1 / Column 5 → 8 (Full House)
  65. Row 5 / Column 6 → 9 (Full House)
  66. Row 5 / Column 4 → 6 (Full House)
  67. Row 7 / Column 5 → 1 (Naked Single)
  68. Row 2 / Column 5 → 6 (Full House)
  69. Row 2 / Column 4 → 1 (Full House)
  70. Row 7 / Column 4 → 9 (Full House)
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