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

This Sudoku Puzzle has 40 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 2 (Claiming), Hidden Pair, Naked Pair techniques.

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

Solution Steps:

  1. Row 2 / Column 6 → 9 (Naked Single)
  2. Row 5 / Column 6 → 2 (Naked Single)
  3. Row 1 / Column 6 → 4 (Full House)
  4. Row 3 / Column 6 → 4 (Full House)
  5. Row 9 / Column 9 → 4 (Hidden Single)
  6. Row 5 / Column 7 → 4 (Hidden Single)
  7. Row 5 / Column 8 → 7 (Full House)
  8. Locked Candidates Type 2 (Claiming): 2 in r1 => r3c789<>2
  9. Row 3 / Column 9 → 1 (Naked Single)
  10. Row 3 / Column 7 → 9 (Naked Single)
  11. Row 3 / Column 8 → 9 (Naked Single)
  12. Hidden Pair: 7,9 in r1c79 => r1c79<>2, r1c79<>6
  13. Row 1 / Column 7 → 7 (Naked Single)
  14. Row 1 / Column 9 → 7 (Naked Single)
  15. Row 1 / Column 8 → 2 (Hidden Single)
  16. Row 7 / Column 6 → 7 (Hidden Single)
  17. Row 8 / Column 6 → 5 (Hidden Single)
  18. Row 9 / Column 6 → 6 (Hidden Single)
  19. Locked Candidates Type 2 (Claiming): 3 in r8 => r9c78<>3
  20. Row 9 / Column 7 → 1 (Naked Single)
  21. Row 9 / Column 8 → 1 (Naked Single)
  22. Row 4 / Column 6 → 1 (Hidden Single)
  23. Row 6 / Column 6 → 8 (Full House)
  24. Naked Pair: 5,6 in r6c78 => r6c9<>5, r6c9<>6
  25. Row 6 / Column 9 → 6 (Naked Single)
  26. Row 6 / Column 7 → 5 (Naked Single)
  27. Row 6 / Column 8 → 5 (Naked Single)
  28. Row 7 / Column 8 → 6 (Naked Single)
  29. Row 7 / Column 7 → 2 (Naked Single)
  30. Row 7 / Column 9 → 5 (Full House)
  31. Row 4 / Column 9 → 2 (Hidden Single)
  32. Naked Pair: 3,8 in r2c78 => r2c9<>3, r2c9<>8
  33. Row 2 / Column 9 → 8 (Naked Single)
  34. Row 2 / Column 7 → 3 (Naked Single)
  35. Row 4 / Column 7 → 8 (Full House)
  36. Row 8 / Column 7 → 8 (Full House)
  37. Row 4 / Column 8 → 3 (Full House)
  38. Row 2 / Column 8 → 3 (Naked Single)
  39. Row 8 / Column 9 → 3 (Naked Single)
  40. Row 8 / Column 8 → 3 (Naked Single)
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