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

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.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Full House Explanation
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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