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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Remote Pair, Skyscraper techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 1 → 9 (Hidden Single)
  2. Row 9 / Column 1 → 2 (Hidden Single)
  3. Row 6 / Column 6 → 8 (Hidden Single)
  4. Row 9 / Column 5 → 9 (Hidden Single)
  5. Row 9 / Column 4 → 6 (Hidden Single)
  6. Row 4 / Column 3 → 6 (Hidden Single)
  7. Row 6 / Column 5 → 6 (Hidden Single)
  8. Row 2 / Column 7 → 6 (Hidden Single)
  9. Row 8 / Column 8 → 6 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 2 in b5 => r5c7<>2
  11. Row 7 / Column 7 → 2 (Hidden Single)
  12. Row 7 / Column 8 → 8 (Hidden Single)
  13. Row 3 / Column 7 → 8 (Hidden Single)
  14. Row 3 / Column 2 → 9 (Hidden Single)
  15. Row 8 / Column 7 → 9 (Hidden Single)
  16. Row 1 / Column 9 → 9 (Hidden Single)
  17. Row 2 / Column 3 → 3 (Hidden Single)
  18. Row 3 / Column 6 → 6 (Hidden Single)
  19. Row 1 / Column 2 → 6 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 4 in b3 => r469c8<>4
  21. Row 4 / Column 8 → 3 (Naked Single)
  22. Row 9 / Column 8 → 5 (Naked Single)
  23. Row 6 / Column 8 → 2 (Naked Single)
  24. Row 6 / Column 2 → 3 (Hidden Single)
  25. Row 9 / Column 9 → 3 (Hidden Single)
  26. Row 5 / Column 7 → 5 (Hidden Single)
  27. Row 2 / Column 9 → 2 (Hidden Single)
  28. Row 2 / Column 5 → 5 (Naked Single)
  29. Row 7 / Column 5 → 4 (Naked Single)
  30. Row 7 / Column 4 → 5 (Full House)
  31. Row 8 / Column 2 → 5 (Hidden Single)
  32. Locked Candidates Type 1 (Pointing): 4 in b7 => r6c3<>4
  33. Remote Pair: 1/4 r6c9 -4- r4c7 -1- r9c7 -4- r9c3 => r6c3<>1
  34. Row 6 / Column 3 → 5 (Naked Single)
  35. Row 1 / Column 1 → 5 (Hidden Single)
  36. Row 1 / Column 4 → 8 (Hidden Single)
  37. Row 2 / Column 4 → 7 (Naked Single)
  38. Row 2 / Column 1 → 8 (Full House)
  39. Skyscraper: 1 in r6c1,r7c2 (connected by r67c9) => r5c2<>1
  40. Row 5 / Column 2 → 7 (Naked Single)
  41. Row 7 / Column 2 → 1 (Full House)
  42. Row 7 / Column 9 → 7 (Full House)
  43. Row 9 / Column 3 → 4 (Naked Single)
  44. Row 8 / Column 3 → 7 (Full House)
  45. Row 8 / Column 9 → 4 (Full House)
  46. Row 9 / Column 7 → 1 (Full House)
  47. Row 1 / Column 3 → 1 (Full House)
  48. Row 6 / Column 9 → 1 (Full House)
  49. Row 4 / Column 7 → 4 (Full House)
  50. Row 3 / Column 1 → 7 (Full House)
  51. Row 6 / Column 1 → 4 (Full House)
  52. Row 4 / Column 4 → 1 (Full House)
  53. Row 5 / Column 1 → 1 (Full House)
  54. Row 1 / Column 5 → 2 (Naked Single)
  55. Row 3 / Column 8 → 4 (Naked Single)
  56. Row 1 / Column 8 → 7 (Full House)
  57. Row 1 / Column 6 → 4 (Full House)
  58. Row 5 / Column 6 → 2 (Full House)
  59. Row 5 / Column 5 → 3 (Naked Single)
  60. Row 3 / Column 5 → 1 (Full House)
  61. Row 3 / Column 4 → 3 (Full House)
  62. Row 5 / Column 4 → 4 (Full House)
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