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

This Sudoku Puzzle has 30 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 5 → 7 (Hidden Single)
  2. Locked Candidates Type 1 (Pointing): 7 in b1 => r1c8<>7
  3. Locked Candidates Type 1 (Pointing): 5 in b3 => r5c8<>5
  4. Locked Candidates Type 2 (Claiming): 4 in r5 => r4c2,r6c3<>4
  5. Row 4 / Column 2 → 7 (Naked Single)
  6. Row 1 / Column 2 → 4 (Naked Single)
  7. Row 3 / Column 2 → 6 (Full House)
  8. Row 5 / Column 2 → 6 (Full House)
  9. Row 4 / Column 9 → 4 (Naked Single)
  10. Row 2 / Column 9 → 7 (Full House)
  11. Row 5 / Column 3 → 4 (Naked Single)
  12. Row 6 / Column 3 → 3 (Naked Single)
  13. Row 1 / Column 3 → 7 (Full House)
  14. Row 3 / Column 1 → 3 (Full House)
  15. Row 1 / Column 6 → 5 (Naked Single)
  16. Row 1 / Column 8 → 3 (Full House)
  17. Row 3 / Column 6 → 4 (Full House)
  18. Row 3 / Column 8 → 5 (Full House)
  19. Row 4 / Column 5 → 3 (Naked Single)
  20. Row 6 / Column 5 → 4 (Full House)
  21. Row 6 / Column 7 → 5 (Naked Single)
  22. Row 2 / Column 8 → 9 (Naked Single)
  23. Row 2 / Column 7 → 4 (Full House)
  24. Row 4 / Column 7 → 9 (Full House)
  25. Row 5 / Column 8 → 7 (Full House)
  26. Row 4 / Column 1 → 5 (Full House)
  27. Row 6 / Column 1 → 5 (Naked Single)
  28. Row 6 / Column 4 → 7 (Naked Single)
  29. Row 5 / Column 4 → 5 (Full House)
  30. Row 5 / Column 1 → 9 (Naked Single)
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