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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Full House, Remote Pair 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 → 1 (Hidden Single)
  2. Row 1 / Column 8 → 8 (Hidden Single)
  3. Row 4 / Column 7 → 8 (Hidden Single)
  4. Row 8 / Column 1 → 8 (Hidden Single)
  5. Row 1 / Column 9 → 9 (Hidden Single)
  6. Row 5 / Column 2 → 8 (Hidden Single)
  7. Row 1 / Column 6 → 2 (Hidden Single)
  8. Row 6 / Column 2 → 4 (Hidden Single)
  9. Row 5 / Column 3 → 9 (Hidden Single)
  10. Row 8 / Column 3 → 7 (Naked Single)
  11. Row 8 / Column 6 → 9 (Hidden Single)
  12. Row 6 / Column 1 → 7 (Hidden Single)
  13. Row 4 / Column 1 → 1 (Hidden Single)
  14. Row 4 / Column 3 → 3 (Hidden Single)
  15. Locked Candidates Type 1 (Pointing): 5 in b5 => r78c5<>5
  16. Locked Candidates Type 1 (Pointing): 4 in b9 => r8c5<>4
  17. Locked Candidates Type 2 (Claiming): 6 in r1 => r2c5,r3c46<>6
  18. Locked Candidates Type 2 (Claiming): 7 in r1 => r2c5,r3c4<>7
  19. Locked Candidates Type 2 (Claiming): 5 in r8 => r9c79<>5
  20. Naked Pair: 1,6 in r8c58 => r8c7<>1, r8c79<>6
  21. Naked Pair: 4,5 in r37c6 => r5c6<>4, r9c6<>5
  22. Row 5 / Column 4 → 4 (Hidden Single)
  23. Naked Pair: 1,6 in r8c5,r9c6 => r9c4<>6
  24. Row 1 / Column 4 → 6 (Hidden Single)
  25. Row 1 / Column 5 → 7 (Full House)
  26. Remote Pair: 1/6 r5c6 -6- r9c6 -1- r8c5 -6- r8c8 => r5c8<>1, r5c8<>6
  27. Row 5 / Column 8 → 3 (Naked Single)
  28. Row 5 / Column 9 → 6 (Naked Single)
  29. Row 5 / Column 6 → 1 (Full House)
  30. Row 9 / Column 6 → 6 (Naked Single)
  31. Row 8 / Column 5 → 1 (Naked Single)
  32. Row 8 / Column 8 → 6 (Naked Single)
  33. Row 6 / Column 7 → 1 (Hidden Single)
  34. Row 9 / Column 7 → 2 (Naked Single)
  35. Row 7 / Column 8 → 7 (Naked Single)
  36. Row 9 / Column 1 → 9 (Naked Single)
  37. Row 3 / Column 8 → 2 (Naked Single)
  38. Row 9 / Column 8 → 1 (Full House)
  39. Row 9 / Column 9 → 3 (Naked Single)
  40. Row 9 / Column 2 → 5 (Naked Single)
  41. Row 7 / Column 2 → 2 (Full House)
  42. Row 9 / Column 4 → 7 (Full House)
  43. Row 3 / Column 1 → 3 (Naked Single)
  44. Row 2 / Column 1 → 2 (Full House)
  45. Row 4 / Column 2 → 6 (Naked Single)
  46. Row 6 / Column 3 → 2 (Full House)
  47. Row 2 / Column 3 → 6 (Full House)
  48. Row 3 / Column 4 → 5 (Naked Single)
  49. Row 7 / Column 4 → 3 (Full House)
  50. Row 3 / Column 2 → 7 (Naked Single)
  51. Row 2 / Column 2 → 9 (Full House)
  52. Row 4 / Column 5 → 5 (Naked Single)
  53. Row 4 / Column 9 → 2 (Full House)
  54. Row 6 / Column 9 → 5 (Full House)
  55. Row 6 / Column 5 → 6 (Full House)
  56. Row 2 / Column 7 → 4 (Naked Single)
  57. Row 3 / Column 6 → 4 (Naked Single)
  58. Row 2 / Column 5 → 3 (Full House)
  59. Row 7 / Column 5 → 4 (Full House)
  60. Row 2 / Column 9 → 7 (Full House)
  61. Row 8 / Column 9 → 4 (Full House)
  62. Row 3 / Column 7 → 6 (Full House)
  63. Row 8 / Column 7 → 5 (Full House)
  64. Row 7 / Column 6 → 5 (Full House)
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