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

This Sudoku Puzzle has 60 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, undefined, Skyscraper techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 4 → 5 (Naked Single)
  2. Row 6 / Column 5 → 4 (Naked Single)
  3. Row 4 / Column 5 → 3 (Naked Single)
  4. Row 4 / Column 6 → 1 (Full House)
  5. Row 2 / Column 5 → 8 (Naked Single)
  6. Row 1 / Column 4 → 7 (Hidden Single)
  7. Row 3 / Column 5 → 2 (Naked Single)
  8. Row 8 / Column 5 → 7 (Naked Single)
  9. Row 7 / Column 5 → 5 (Full House)
  10. Row 3 / Column 4 → 3 (Hidden Single)
  11. Row 3 / Column 1 → 7 (Hidden Single)
  12. Row 7 / Column 9 → 3 (Hidden Single)
  13. Row 9 / Column 6 → 4 (Hidden Single)
  14. Row 5 / Column 2 → 4 (Hidden Single)
  15. Row 8 / Column 9 → 4 (Hidden Single)
  16. Row 3 / Column 3 → 5 (Hidden Single)
  17. Row 7 / Column 6 → 2 (Hidden Single)
  18. Row 4 / Column 8 → 4 (Hidden Single)
  19. Row 9 / Column 2 → 3 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 9 in b6 => r13c9<>9
  21. Naked Pair: 2,8 in r8c7,r9c8 => r7c78<>8
  22. W-Wing: 6/9 in r1c2,r3c6 connected by 9 in r13c8 => r3c2<>6
  23. XY-Wing: 2/6/1 in r15c9,r2c7 => r3c9,r56c7<>1
  24. Row 3 / Column 2 → 1 (Hidden Single)
  25. Row 2 / Column 7 → 1 (Hidden Single)
  26. Row 7 / Column 1 → 1 (Hidden Single)
  27. W-Wing: 6/9 in r1c2,r4c3 connected by 9 in r7c2,r8c3 => r2c3,r6c2<>6
  28. Row 2 / Column 6 → 6 (Hidden Single)
  29. Row 3 / Column 6 → 9 (Full House)
  30. Row 1 / Column 2 → 6 (Hidden Single)
  31. Row 1 / Column 9 → 2 (Naked Single)
  32. Row 1 / Column 8 → 9 (Full House)
  33. Row 5 / Column 9 → 1 (Naked Single)
  34. Row 6 / Column 3 → 1 (Hidden Single)
  35. Row 4 / Column 3 → 6 (Hidden Single)
  36. Skyscraper: 2 in r6c1,r8c3 (connected by r68c7) => r5c3,r9c1<>2
  37. Row 5 / Column 3 → 3 (Naked Single)
  38. Row 9 / Column 1 → 8 (Naked Single)
  39. Row 9 / Column 8 → 2 (Full House)
  40. Row 2 / Column 3 → 9 (Naked Single)
  41. Row 2 / Column 1 → 3 (Full House)
  42. Row 8 / Column 3 → 2 (Full House)
  43. Row 7 / Column 2 → 9 (Full House)
  44. Row 6 / Column 2 → 8 (Full House)
  45. Row 5 / Column 8 → 7 (Naked Single)
  46. Row 8 / Column 7 → 8 (Naked Single)
  47. Row 8 / Column 4 → 9 (Full House)
  48. Row 7 / Column 4 → 8 (Full House)
  49. Row 7 / Column 8 → 6 (Naked Single)
  50. Row 3 / Column 8 → 8 (Full House)
  51. Row 7 / Column 7 → 7 (Full House)
  52. Row 3 / Column 9 → 6 (Full House)
  53. Row 4 / Column 7 → 5 (Naked Single)
  54. Row 6 / Column 9 → 9 (Naked Single)
  55. Row 4 / Column 9 → 8 (Full House)
  56. Row 4 / Column 1 → 9 (Full House)
  57. Row 5 / Column 7 → 2 (Naked Single)
  58. Row 5 / Column 1 → 5 (Full House)
  59. Row 6 / Column 1 → 2 (Full House)
  60. Row 6 / Column 7 → 6 (Full House)
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