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

This Sudoku Puzzle has 39 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Pair, Hidden Single, Naked Single, Full House, Skyscraper, Locked Pair techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 2 in b7 => r13c3<>2
  2. Naked Pair: 8,9 in r8c57 => r8c38<>8, r8c8<>9
  3. Row 1 / Column 8 → 9 (Hidden Single)
  4. Row 9 / Column 8 → 8 (Hidden Single)
  5. Row 8 / Column 7 → 9 (Naked Single)
  6. Row 9 / Column 5 → 1 (Naked Single)
  7. Row 5 / Column 7 → 5 (Naked Single)
  8. Row 5 / Column 9 → 9 (Full House)
  9. Row 8 / Column 5 → 8 (Naked Single)
  10. Row 7 / Column 5 → 9 (Full House)
  11. Row 7 / Column 7 → 4 (Naked Single)
  12. Row 9 / Column 7 → 7 (Naked Single)
  13. Row 2 / Column 7 → 6 (Naked Single)
  14. Row 2 / Column 9 → 4 (Hidden Single)
  15. Row 1 / Column 2 → 6 (Hidden Single)
  16. Naked Pair: 3,5 in r7c29 => r7c3<>3, r7c3<>5
  17. Skyscraper: 3 in r2c8,r7c9 (connected by r27c2) => r3c9,r8c8<>3
  18. Row 8 / Column 8 → 2 (Naked Single)
  19. Row 2 / Column 8 → 3 (Full House)
  20. Row 8 / Column 3 → 3 (Full House)
  21. Row 2 / Column 2 → 5 (Full House)
  22. Row 7 / Column 2 → 5 (Full House)
  23. Row 2 / Column 5 → 2 (Full House)
  24. Row 9 / Column 9 → 5 (Naked Single)
  25. Row 7 / Column 9 → 3 (Full House)
  26. Row 9 / Column 3 → 2 (Full House)
  27. Row 3 / Column 5 → 7 (Naked Single)
  28. Row 1 / Column 5 → 5 (Full House)
  29. Row 3 / Column 9 → 2 (Naked Single)
  30. Row 1 / Column 9 → 7 (Full House)
  31. Row 1 / Column 1 → 2 (Hidden Single)
  32. Locked Pair: 1,8 in r13c3 => r3c1,r7c3<>1, r3c1,r7c3<>8
  33. Row 7 / Column 3 → 8 (Naked Single)
  34. Row 3 / Column 1 → 8 (Naked Single)
  35. Row 1 / Column 3 → 1 (Naked Single)
  36. Row 1 / Column 7 → 8 (Full House)
  37. Row 3 / Column 7 → 1 (Full House)
  38. Row 3 / Column 3 → 1 (Naked Single)
  39. Row 7 / Column 1 → 1 (Naked Single)
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