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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Naked Single, Full House, Locked Candidates Type 1 (Pointing) 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 4 → 6 (Hidden Single)
  2. Row 1 / Column 7 → 2 (Hidden Single)
  3. Row 9 / Column 8 → 3 (Hidden Single)
  4. Row 9 / Column 3 → 2 (Hidden Single)
  5. Row 8 / Column 6 → 2 (Hidden Single)
  6. Locked Candidates Type 2 (Claiming): 8 in r9 => r8c4<>8
  7. Naked Pair: 6,9 in r9c27 => r9c46<>9
  8. Naked Triple: 1,4,5 in r1c23,r3c3 => r2c12,r3c1<>5, r2c2<>1, r2c2<>4
  9. Row 2 / Column 8 → 4 (Hidden Single)
  10. Row 8 / Column 8 → 9 (Hidden Single)
  11. Row 9 / Column 7 → 6 (Naked Single)
  12. Row 9 / Column 2 → 9 (Naked Single)
  13. Row 3 / Column 7 → 9 (Hidden Single)
  14. Row 7 / Column 5 → 9 (Hidden Single)
  15. Row 5 / Column 2 → 6 (Hidden Single)
  16. Row 7 / Column 3 → 4 (Hidden Single)
  17. Row 8 / Column 2 → 5 (Naked Single)
  18. Row 7 / Column 1 → 8 (Naked Single)
  19. Row 8 / Column 1 → 6 (Full House)
  20. Row 5 / Column 6 → 3 (Hidden Single)
  21. Row 1 / Column 2 → 4 (Hidden Single)
  22. Row 5 / Column 3 → 8 (Hidden Single)
  23. Row 8 / Column 9 → 8 (Hidden Single)
  24. Naked Triple: 1,5,7 in r237c9 => r46c9<>1, r46c9<>5, r4c9<>7
  25. Locked Candidates Type 1 (Pointing): 7 in b6 => r1c8<>7
  26. Row 1 / Column 6 → 7 (Hidden Single)
  27. Row 9 / Column 6 → 8 (Naked Single)
  28. Row 9 / Column 4 → 7 (Full House)
  29. Row 4 / Column 5 → 7 (Hidden Single)
  30. Row 5 / Column 8 → 7 (Hidden Single)
  31. Row 4 / Column 4 → 4 (Hidden Single)
  32. Row 8 / Column 4 → 1 (Naked Single)
  33. Row 8 / Column 5 → 4 (Full House)
  34. Row 5 / Column 4 → 5 (Naked Single)
  35. Row 5 / Column 7 → 1 (Full House)
  36. Row 7 / Column 7 → 5 (Full House)
  37. Row 7 / Column 9 → 1 (Full House)
  38. Row 2 / Column 4 → 9 (Naked Single)
  39. Row 6 / Column 4 → 8 (Full House)
  40. Row 4 / Column 6 → 1 (Naked Single)
  41. Row 6 / Column 8 → 5 (Naked Single)
  42. Row 2 / Column 6 → 5 (Naked Single)
  43. Row 6 / Column 6 → 9 (Full House)
  44. Row 6 / Column 5 → 6 (Full House)
  45. Row 4 / Column 2 → 2 (Naked Single)
  46. Row 1 / Column 8 → 1 (Naked Single)
  47. Row 4 / Column 8 → 8 (Full House)
  48. Row 1 / Column 3 → 5 (Full House)
  49. Row 3 / Column 3 → 1 (Full House)
  50. Row 2 / Column 9 → 7 (Naked Single)
  51. Row 3 / Column 9 → 5 (Full House)
  52. Row 6 / Column 9 → 2 (Naked Single)
  53. Row 4 / Column 9 → 6 (Full House)
  54. Row 4 / Column 1 → 5 (Full House)
  55. Row 2 / Column 2 → 3 (Naked Single)
  56. Row 6 / Column 2 → 1 (Full House)
  57. Row 6 / Column 1 → 3 (Full House)
  58. Row 3 / Column 5 → 3 (Naked Single)
  59. Row 2 / Column 5 → 1 (Full House)
  60. Row 2 / Column 1 → 2 (Full House)
  61. Row 3 / Column 1 → 7 (Full House)
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