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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Skyscraper, Locked Candidates Type 2 (Claiming), Full House techniques.

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

Solution Steps:

  1. Row 2 / Column 6 → 9 (Hidden Single)
  2. Row 5 / Column 5 → 3 (Hidden Single)
  3. Row 2 / Column 1 → 3 (Hidden Single)
  4. Row 8 / Column 6 → 3 (Hidden Single)
  5. Row 8 / Column 2 → 1 (Hidden Single)
  6. Row 9 / Column 5 → 8 (Hidden Single)
  7. Row 8 / Column 1 → 2 (Hidden Single)
  8. Row 4 / Column 2 → 6 (Hidden Single)
  9. Row 1 / Column 6 → 8 (Hidden Single)
  10. Row 3 / Column 3 → 2 (Hidden Single)
  11. Row 8 / Column 8 → 6 (Hidden Single)
  12. Row 6 / Column 2 → 2 (Hidden Single)
  13. Row 4 / Column 4 → 8 (Hidden Single)
  14. Row 3 / Column 6 → 5 (Hidden Single)
  15. Row 7 / Column 3 → 6 (Hidden Single)
  16. Row 5 / Column 1 → 8 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 4 in b2 => r7c5<>4
  18. Locked Candidates Type 1 (Pointing): 7 in b2 => r47c5<>7
  19. Locked Candidates Type 1 (Pointing): 5 in b3 => r7c8<>5
  20. Locked Candidates Type 1 (Pointing): 7 in b6 => r6c146<>7
  21. Row 6 / Column 6 → 4 (Naked Single)
  22. Row 5 / Column 2 → 4 (Hidden Single)
  23. Row 7 / Column 4 → 4 (Hidden Single)
  24. Row 9 / Column 1 → 4 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 7 in b4 => r9c3<>7
  26. Skyscraper: 7 in r2c8,r9c9 (connected by r29c2) => r3c9,r7c8<>7
  27. Locked Candidates Type 2 (Claiming): 7 in c9 => r7c7<>7
  28. Skyscraper: 9 in r7c1,r8c4 (connected by r6c14) => r7c5<>9
  29. Row 7 / Column 5 → 2 (Naked Single)
  30. Row 4 / Column 5 → 9 (Naked Single)
  31. Row 7 / Column 6 → 7 (Naked Single)
  32. Row 4 / Column 6 → 2 (Full House)
  33. Row 4 / Column 3 → 7 (Full House)
  34. Row 8 / Column 4 → 9 (Full House)
  35. Row 8 / Column 9 → 7 (Full House)
  36. Row 6 / Column 4 → 5 (Naked Single)
  37. Row 5 / Column 4 → 7 (Full House)
  38. Row 5 / Column 3 → 5 (Full House)
  39. Row 6 / Column 1 → 9 (Full House)
  40. Row 9 / Column 3 → 9 (Full House)
  41. Row 7 / Column 1 → 5 (Naked Single)
  42. Row 9 / Column 2 → 7 (Full House)
  43. Row 9 / Column 9 → 5 (Full House)
  44. Row 2 / Column 2 → 5 (Full House)
  45. Row 2 / Column 8 → 7 (Full House)
  46. Row 1 / Column 7 → 6 (Naked Single)
  47. Row 6 / Column 8 → 8 (Naked Single)
  48. Row 6 / Column 7 → 7 (Full House)
  49. Row 1 / Column 1 → 7 (Naked Single)
  50. Row 3 / Column 1 → 6 (Full House)
  51. Row 3 / Column 7 → 9 (Naked Single)
  52. Row 7 / Column 7 → 8 (Full House)
  53. Row 7 / Column 8 → 1 (Naked Single)
  54. Row 7 / Column 9 → 9 (Full House)
  55. Row 3 / Column 9 → 1 (Full House)
  56. Row 1 / Column 5 → 4 (Naked Single)
  57. Row 1 / Column 8 → 5 (Full House)
  58. Row 3 / Column 8 → 4 (Full House)
  59. Row 3 / Column 5 → 7 (Full House)
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