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

This Sudoku Puzzle has 46 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Bivalue Universal Grave + 1, Give Up techniques.

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

Solution Steps:

  1. Row 7 / Column 4 → 6 (Naked Single)
  2. Row 4 / Column 9 → 7 (Naked Single)
  3. Row 8 / Column 1 → 6 (Naked Single)
  4. Row 1 / Column 5 → 5 (Naked Single)
  5. Row 6 / Column 5 → 1 (Naked Single)
  6. Row 8 / Column 4 → 9 (Naked Single)
  7. Row 8 / Column 2 → 4 (Naked Single)
  8. Row 8 / Column 3 → 2 (Naked Single)
  9. Row 5 / Column 5 → 9 (Naked Single)
  10. Row 2 / Column 4 → 7 (Naked Single)
  11. Row 8 / Column 8 → 3 (Naked Single)
  12. Row 8 / Column 7 → 5 (Full House)
  13. Row 3 / Column 5 → 2 (Naked Single)
  14. Row 7 / Column 5 → 4 (Full House)
  15. Row 6 / Column 8 → 6 (Naked Single)
  16. Row 1 / Column 8 → 8 (Naked Single)
  17. Row 2 / Column 8 → 2 (Naked Single)
  18. Row 6 / Column 7 → 3 (Naked Single)
  19. Row 6 / Column 3 → 7 (Full House)
  20. Row 5 / Column 8 → 1 (Naked Single)
  21. Row 7 / Column 8 → 7 (Full House)
  22. Row 4 / Column 7 → 8 (Naked Single)
  23. Row 7 / Column 3 → 1 (Naked Single)
  24. Row 7 / Column 6 → 2 (Full House)
  25. Row 9 / Column 2 → 7 (Full House)
  26. Row 9 / Column 6 → 1 (Full House)
  27. Row 5 / Column 1 → 3 (Naked Single)
  28. Row 1 / Column 1 → 1 (Full House)
  29. Row 4 / Column 4 → 3 (Naked Single)
  30. Row 5 / Column 4 → 8 (Full House)
  31. Row 4 / Column 6 → 5 (Naked Single)
  32. Row 4 / Column 2 → 1 (Full House)
  33. Row 5 / Column 6 → 7 (Full House)
  34. Row 3 / Column 2 → 8 (Hidden Single)
  35. Locked Candidates Type 1 (Pointing): 6 in b3 => r3c36<>6
  36. Bivalue Universal Grave + 1 => r2c3<>5, r2c3<>9
  37. Row 2 / Column 3 → 6 (Naked Single)
  38. Row 1 / Column 3 → 3 (Naked Single)
  39. Row 1 / Column 6 → 6 (Full House)
  40. Row 2 / Column 2 → 5 (Naked Single)
  41. Row 2 / Column 6 → 9 (Full House)
  42. Row 3 / Column 3 → 9 (Full House)
  43. Row 5 / Column 3 → 5 (Full House)
  44. Row 5 / Column 2 → 6 (Full House)
  45. Row 3 / Column 6 → 3 (Full House)
  46. Give Up: Don't know how to proceed!
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