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

This Sudoku Puzzle has 47 steps and it is solved using Naked Single, Locked Candidates Type 1 (Pointing), Full House techniques.

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

Solution Steps:

  1. Row 6 / Column 9 → 5 (Naked Single)
  2. Locked Candidates Type 1 (Pointing): 2 in b1 => r1c46<>2
  3. Row 1 / Column 4 → 1 (Naked Single)
  4. Locked Candidates Type 1 (Pointing): 4 in b1 => r3c46<>4
  5. Row 3 / Column 4 → 9 (Naked Single)
  6. Row 2 / Column 5 → 6 (Naked Single)
  7. Row 2 / Column 9 → 8 (Naked Single)
  8. Row 2 / Column 8 → 5 (Naked Single)
  9. Row 4 / Column 9 → 3 (Naked Single)
  10. Row 8 / Column 9 → 6 (Full House)
  11. Row 2 / Column 1 → 1 (Naked Single)
  12. Row 8 / Column 8 → 2 (Naked Single)
  13. Row 8 / Column 7 → 3 (Full House)
  14. Row 2 / Column 7 → 9 (Naked Single)
  15. Row 3 / Column 1 → 8 (Naked Single)
  16. Row 6 / Column 8 → 7 (Naked Single)
  17. Row 3 / Column 6 → 7 (Naked Single)
  18. Row 1 / Column 8 → 6 (Naked Single)
  19. Row 5 / Column 8 → 8 (Full House)
  20. Row 4 / Column 7 → 2 (Naked Single)
  21. Row 5 / Column 7 → 6 (Full House)
  22. Row 1 / Column 5 → 3 (Naked Single)
  23. Row 1 / Column 7 → 7 (Naked Single)
  24. Row 3 / Column 7 → 1 (Full House)
  25. Row 4 / Column 6 → 4 (Naked Single)
  26. Row 1 / Column 6 → 8 (Naked Single)
  27. Row 5 / Column 5 → 7 (Naked Single)
  28. Row 4 / Column 5 → 9 (Full House)
  29. Row 2 / Column 6 → 2 (Naked Single)
  30. Row 2 / Column 4 → 4 (Full House)
  31. Row 4 / Column 4 → 5 (Naked Single)
  32. Row 5 / Column 4 → 2 (Full House)
  33. Row 5 / Column 1 → 5 (Naked Single)
  34. Row 7 / Column 1 → 7 (Full House)
  35. Row 6 / Column 6 → 1 (Naked Single)
  36. Row 5 / Column 6 → 3 (Full House)
  37. Row 6 / Column 3 → 2 (Full House)
  38. Row 4 / Column 2 → 7 (Naked Single)
  39. Row 4 / Column 3 → 8 (Full House)
  40. Row 5 / Column 2 → 4 (Naked Single)
  41. Row 5 / Column 3 → 1 (Full House)
  42. Row 1 / Column 3 → 5 (Naked Single)
  43. Row 1 / Column 2 → 2 (Full House)
  44. Row 3 / Column 2 → 6 (Naked Single)
  45. Row 3 / Column 3 → 4 (Full House)
  46. Row 7 / Column 3 → 6 (Full House)
  47. Row 7 / Column 2 → 5 (Full House)
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