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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Triple, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 8 / Column 7 → 2 (Hidden Single)
  2. Row 2 / Column 1 → 3 (Hidden Single)
  3. Row 8 / Column 8 → 9 (Hidden Single)
  4. Locked Pair: 7,8 in r46c5 => r3c5<>7, r39c5,r456c6<>8
  5. Row 4 / Column 6 → 3 (Naked Single)
  6. Row 5 / Column 6 → 5 (Naked Single)
  7. Row 6 / Column 6 → 5 (Naked Single)
  8. Locked Triple: 1,5,6 in r8c123 => r8c4,r9c3<>5, r7c23,r8c4,r9c3<>6, r7c23,r9c3<>1
  9. Row 8 / Column 4 → 6 (Naked Single)
  10. Row 7 / Column 4 → 8 (Naked Single)
  11. Row 8 / Column 1 → 1 (Naked Single)
  12. Row 2 / Column 4 → 7 (Naked Single)
  13. Row 3 / Column 4 → 7 (Naked Single)
  14. Row 7 / Column 2 → 7 (Naked Single)
  15. Row 9 / Column 4 → 5 (Naked Single)
  16. Row 8 / Column 2 → 5 (Naked Single)
  17. Row 8 / Column 3 → 5 (Naked Single)
  18. Row 7 / Column 3 → 3 (Naked Single)
  19. Row 9 / Column 3 → 8 (Naked Single)
  20. Row 5 / Column 3 → 1 (Hidden Single)
  21. Row 1 / Column 3 → 7 (Hidden Single)
  22. Row 5 / Column 9 → 2 (Hidden Single)
  23. Row 5 / Column 7 → 9 (Hidden Single)
  24. Row 3 / Column 9 → 9 (Hidden Single)
  25. Row 4 / Column 3 → 9 (Hidden Single)
  26. Row 3 / Column 7 → 5 (Hidden Single)
  27. Locked Pair: 1,6 in r12c9 => r12c7,r4679c9<>6, r12c7,r79c9<>1
  28. Row 7 / Column 9 → 6 (Naked Single)
  29. Row 1 / Column 7 → 8 (Naked Single)
  30. Row 2 / Column 7 → 8 (Naked Single)
  31. Row 1 / Column 9 → 1 (Naked Single)
  32. Row 2 / Column 9 → 1 (Naked Single)
  33. Row 7 / Column 7 → 1 (Naked Single)
  34. Row 9 / Column 8 → 7 (Naked Single)
  35. Row 5 / Column 8 → 8 (Naked Single)
  36. Row 5 / Column 1 → 7 (Full House)
  37. Row 6 / Column 8 → 6 (Full House)
  38. Row 9 / Column 7 → 3 (Naked Single)
  39. Row 9 / Column 9 → 3 (Naked Single)
  40. Row 6 / Column 1 → 8 (Naked Single)
  41. Row 3 / Column 1 → 6 (Full House)
  42. Row 6 / Column 5 → 7 (Naked Single)
  43. Row 1 / Column 2 → 4 (Naked Single)
  44. Row 1 / Column 6 → 6 (Full House)
  45. Row 2 / Column 2 → 2 (Naked Single)
  46. Row 2 / Column 3 → 2 (Naked Single)
  47. Row 4 / Column 5 → 8 (Naked Single)
  48. Row 6 / Column 7 → 4 (Naked Single)
  49. Row 6 / Column 9 → 4 (Naked Single)
  50. Row 3 / Column 3 → 2 (Naked Single)
  51. Row 4 / Column 2 → 6 (Naked Single)
  52. Row 4 / Column 7 → 7 (Full House)
  53. Row 4 / Column 9 → 7 (Full House)
  54. Row 6 / Column 2 → 2 (Naked Single)
  55. Row 2 / Column 6 → 2 (Naked Single)
  56. Row 6 / Column 3 → 4 (Naked Single)
  57. Row 3 / Column 5 → 1 (Naked Single)
  58. Row 9 / Column 5 → 2 (Full House)
  59. Row 9 / Column 6 → 1 (Naked Single)
  60. Row 3 / Column 2 → 8 (Naked Single)
  61. Row 3 / Column 6 → 4 (Naked Single)
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