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

This Sudoku Puzzle has 36 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Uniqueness Test 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 1 / Column 8 → 8 (Hidden Single)
  2. Row 1 / Column 3 → 2 (Hidden Single)
  3. Row 2 / Column 9 → 6 (Hidden Single)
  4. Row 3 / Column 6 → 6 (Hidden Single)
  5. Row 5 / Column 3 → 6 (Hidden Single)
  6. Row 7 / Column 7 → 9 (Hidden Single)
  7. Row 9 / Column 1 → 9 (Hidden Single)
  8. Row 9 / Column 6 → 2 (Hidden Single)
  9. Row 8 / Column 5 → 7 (Hidden Single)
  10. Row 7 / Column 3 → 1 (Hidden Single)
  11. Row 9 / Column 8 → 6 (Hidden Single)
  12. Row 8 / Column 1 → 2 (Hidden Single)
  13. Row 7 / Column 8 → 7 (Hidden Single)
  14. Row 4 / Column 9 → 7 (Hidden Single)
  15. Row 9 / Column 5 → 3 (Hidden Single)
  16. Row 7 / Column 2 → 3 (Hidden Single)
  17. Row 5 / Column 2 → 5 (Naked Single)
  18. Row 2 / Column 2 → 4 (Full House)
  19. Row 9 / Column 4 → 5 (Hidden Single)
  20. Row 2 / Column 3 → 5 (Hidden Single)
  21. Row 6 / Column 8 → 5 (Hidden Single)
  22. Row 6 / Column 5 → 1 (Naked Single)
  23. Row 4 / Column 3 → 3 (Hidden Single)
  24. Row 6 / Column 3 → 7 (Hidden Single)
  25. Row 6 / Column 1 → 8 (Full House)
  26. Row 4 / Column 1 → 1 (Full House)
  27. Locked Candidates Type 1 (Pointing): 4 in b3 => r3c4<>4
  28. Uniqueness Test 1: 4/5 in r1c56,r4c56 => r4c6<>4, r4c6<>5
  29. Row 4 / Column 6 → 8 (Naked Single)
  30. Row 4 / Column 4 → 4 (Naked Single)
  31. Row 4 / Column 5 → 5 (Full House)
  32. Row 1 / Column 5 → 4 (Full House)
  33. Row 1 / Column 6 → 5 (Full House)
  34. Row 7 / Column 6 → 4 (Full House)
  35. Row 7 / Column 4 → 8 (Full House)
  36. Give Up: Don't know how to proceed!
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