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

This Sudoku Puzzle has 64 steps and it is solved using Naked Single, Hidden Single, Full House, Naked Triple, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Locked Pair, Hidden Pair, undefined techniques.

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

Solution Steps:

  1. Row 4 / Column 4 → 1 (Naked Single)
  2. Row 4 / Column 2 → 3 (Hidden Single)
  3. Row 5 / Column 5 → 2 (Hidden Single)
  4. Row 8 / Column 6 → 1 (Hidden Single)
  5. Row 6 / Column 2 → 5 (Hidden Single)
  6. Row 4 / Column 6 → 5 (Hidden Single)
  7. Row 4 / Column 8 → 8 (Full House)
  8. Row 6 / Column 8 → 9 (Naked Single)
  9. Row 5 / Column 8 → 5 (Naked Single)
  10. Row 6 / Column 3 → 4 (Hidden Single)
  11. Row 6 / Column 6 → 8 (Hidden Single)
  12. Naked Triple: 2,3,7 in r7c6,r89c4 => r79c5<>3, r79c5<>7
  13. Locked Candidates Type 1 (Pointing): 3 in b8 => r2c4<>3
  14. Locked Candidates Type 2 (Claiming): 3 in r2 => r13c9,r3c8<>3
  15. Row 3 / Column 8 → 7 (Naked Single)
  16. Row 2 / Column 7 → 2 (Naked Single)
  17. Row 1 / Column 6 → 2 (Hidden Single)
  18. Row 7 / Column 6 → 7 (Naked Single)
  19. Row 2 / Column 6 → 9 (Full House)
  20. Row 7 / Column 1 → 2 (Hidden Single)
  21. Row 9 / Column 7 → 7 (Hidden Single)
  22. Row 9 / Column 1 → 8 (Hidden Single)
  23. Locked Pair: 3,4 in r2c89 => r1c9,r2c2<>4
  24. Naked Triple: 4,6,7 in r278c2 => r19c2<>4, r1c2<>7
  25. Row 1 / Column 1 → 4 (Hidden Single)
  26. Naked Triple: 1,5,9 in r1c279 => r1c3<>1, r1c3<>9
  27. Hidden Pair: 1,9 in r9c23 => r9c3<>3
  28. W-Wing: 3/7 in r1c3,r8c1 connected by 7 in r5c13 => r3c1,r7c3<>3
  29. Row 3 / Column 1 → 9 (Naked Single)
  30. Row 7 / Column 3 → 6 (Naked Single)
  31. Row 1 / Column 2 → 1 (Naked Single)
  32. Row 5 / Column 1 → 7 (Naked Single)
  33. Row 5 / Column 3 → 9 (Full House)
  34. Row 8 / Column 1 → 3 (Full House)
  35. Row 7 / Column 2 → 4 (Naked Single)
  36. Row 1 / Column 7 → 5 (Naked Single)
  37. Row 3 / Column 3 → 3 (Naked Single)
  38. Row 9 / Column 2 → 9 (Naked Single)
  39. Row 9 / Column 3 → 1 (Naked Single)
  40. Row 8 / Column 2 → 7 (Full House)
  41. Row 1 / Column 3 → 7 (Full House)
  42. Row 2 / Column 2 → 6 (Full House)
  43. Row 8 / Column 4 → 2 (Naked Single)
  44. Row 7 / Column 5 → 5 (Naked Single)
  45. Row 1 / Column 9 → 9 (Naked Single)
  46. Row 1 / Column 5 → 3 (Full House)
  47. Row 7 / Column 7 → 8 (Naked Single)
  48. Row 7 / Column 9 → 3 (Full House)
  49. Row 3 / Column 5 → 6 (Naked Single)
  50. Row 2 / Column 4 → 7 (Full House)
  51. Row 8 / Column 8 → 4 (Naked Single)
  52. Row 8 / Column 9 → 6 (Full House)
  53. Row 9 / Column 4 → 3 (Naked Single)
  54. Row 9 / Column 5 → 4 (Full House)
  55. Row 6 / Column 5 → 7 (Full House)
  56. Row 6 / Column 4 → 6 (Full House)
  57. Row 3 / Column 7 → 1 (Naked Single)
  58. Row 3 / Column 9 → 8 (Full House)
  59. Row 5 / Column 7 → 6 (Full House)
  60. Row 5 / Column 9 → 1 (Full House)
  61. Row 2 / Column 9 → 4 (Naked Single)
  62. Row 2 / Column 8 → 3 (Full House)
  63. Row 9 / Column 8 → 2 (Full House)
  64. Row 9 / Column 9 → 5 (Full House)
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