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

This Sudoku Puzzle has 67 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Locked Candidates Type 2 (Claiming), Skyscraper, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 1 → 9 (Hidden Single)
  2. Row 2 / Column 4 → 2 (Hidden Single)
  3. Row 5 / Column 5 → 6 (Hidden Single)
  4. Row 1 / Column 4 → 4 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 8 in b1 => r79c1<>8
  6. Locked Candidates Type 1 (Pointing): 2 in b4 => r5c789<>2
  7. Locked Candidates Type 1 (Pointing): 6 in b4 => r28c2<>6
  8. Locked Candidates Type 1 (Pointing): 6 in b1 => r3c789<>6
  9. Row 7 / Column 9 → 6 (Hidden Single)
  10. Row 3 / Column 1 → 6 (Hidden Single)
  11. Row 8 / Column 3 → 6 (Hidden Single)
  12. Row 7 / Column 7 → 4 (Hidden Single)
  13. Row 5 / Column 9 → 4 (Hidden Single)
  14. Row 1 / Column 1 → 8 (Hidden Single)
  15. Row 2 / Column 8 → 4 (Hidden Single)
  16. Row 2 / Column 7 → 6 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 5 in b5 => r8c6<>5
  18. Locked Candidates Type 1 (Pointing): 3 in b6 => r13c7<>3
  19. Locked Candidates Type 1 (Pointing): 2 in b7 => r9c79<>2
  20. Row 9 / Column 9 → 5 (Naked Single)
  21. Row 1 / Column 9 → 3 (Naked Single)
  22. Row 3 / Column 9 → 2 (Full House)
  23. Row 1 / Column 3 → 1 (Naked Single)
  24. Row 3 / Column 8 → 1 (Naked Single)
  25. Row 1 / Column 5 → 9 (Naked Single)
  26. Row 1 / Column 7 → 5 (Full House)
  27. Row 3 / Column 7 → 9 (Full House)
  28. Row 5 / Column 8 → 8 (Naked Single)
  29. Row 4 / Column 7 → 1 (Naked Single)
  30. Row 8 / Column 8 → 2 (Naked Single)
  31. Row 5 / Column 7 → 3 (Naked Single)
  32. Row 6 / Column 7 → 2 (Naked Single)
  33. Row 8 / Column 5 → 5 (Hidden Single)
  34. Row 7 / Column 3 → 5 (Hidden Single)
  35. Row 8 / Column 6 → 9 (Hidden Single)
  36. Locked Candidates Type 2 (Claiming): 8 in r7 => r8c4,r9c5<>8
  37. Skyscraper: 1 in r7c4,r9c2 (connected by r6c24) => r7c1,r9c5<>1
  38. Row 7 / Column 1 → 7 (Naked Single)
  39. 2-String Kite: 7 in r2c2,r5c6 (connected by r4c2,r5c3) => r2c6<>7
  40. W-Wing: 7/3 in r2c2,r9c5 connected by 3 in r8c24 => r2c5<>7
  41. Row 2 / Column 2 → 7 (Hidden Single)
  42. Row 3 / Column 3 → 3 (Full House)
  43. Row 4 / Column 2 → 6 (Naked Single)
  44. Row 9 / Column 3 → 2 (Naked Single)
  45. Row 5 / Column 3 → 7 (Full House)
  46. Row 4 / Column 8 → 5 (Naked Single)
  47. Row 6 / Column 8 → 6 (Full House)
  48. Row 6 / Column 2 → 1 (Naked Single)
  49. Row 5 / Column 1 → 2 (Full House)
  50. Row 9 / Column 1 → 1 (Full House)
  51. Row 5 / Column 6 → 1 (Full House)
  52. Row 6 / Column 4 → 3 (Naked Single)
  53. Row 6 / Column 6 → 5 (Full House)
  54. Row 2 / Column 6 → 3 (Naked Single)
  55. Row 2 / Column 5 → 1 (Full House)
  56. Row 8 / Column 4 → 7 (Naked Single)
  57. Row 7 / Column 5 → 8 (Naked Single)
  58. Row 7 / Column 4 → 1 (Full House)
  59. Row 4 / Column 4 → 8 (Full House)
  60. Row 9 / Column 5 → 3 (Full House)
  61. Row 3 / Column 5 → 7 (Full House)
  62. Row 4 / Column 6 → 7 (Full House)
  63. Row 3 / Column 6 → 8 (Full House)
  64. Row 8 / Column 7 → 8 (Naked Single)
  65. Row 8 / Column 2 → 3 (Full House)
  66. Row 9 / Column 2 → 8 (Full House)
  67. Row 9 / Column 7 → 7 (Full House)
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