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

This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Naked Triple, Locked Candidates Type 2 (Claiming), undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 2 → 2 (Hidden Single)
  2. Row 3 / Column 9 → 3 (Hidden Single)
  3. Row 1 / Column 4 → 3 (Hidden Single)
  4. Row 5 / Column 9 → 2 (Hidden Single)
  5. Row 4 / Column 8 → 8 (Hidden Single)
  6. Row 9 / Column 8 → 3 (Hidden Single)
  7. Row 6 / Column 4 → 1 (Hidden Single)
  8. Row 2 / Column 6 → 8 (Hidden Single)
  9. Row 8 / Column 8 → 7 (Hidden Single)
  10. Row 7 / Column 5 → 8 (Hidden Single)
  11. Row 2 / Column 4 → 2 (Hidden Single)
  12. Row 7 / Column 6 → 2 (Hidden Single)
  13. Row 8 / Column 2 → 1 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 4 in b1 => r1c789<>4
  15. Locked Candidates Type 1 (Pointing): 6 in b2 => r569c5<>6
  16. Row 6 / Column 5 → 4 (Naked Single)
  17. Row 6 / Column 8 → 5 (Naked Single)
  18. Row 6 / Column 6 → 6 (Full House)
  19. Row 5 / Column 8 → 1 (Naked Single)
  20. Row 4 / Column 4 → 7 (Naked Single)
  21. Row 8 / Column 6 → 9 (Naked Single)
  22. Row 1 / Column 8 → 9 (Naked Single)
  23. Row 2 / Column 8 → 4 (Full House)
  24. Row 5 / Column 7 → 6 (Naked Single)
  25. Row 4 / Column 9 → 4 (Full House)
  26. Row 5 / Column 5 → 9 (Naked Single)
  27. Row 9 / Column 5 → 7 (Naked Single)
  28. Row 2 / Column 9 → 6 (Naked Single)
  29. Row 2 / Column 2 → 9 (Full House)
  30. Locked Candidates Type 1 (Pointing): 5 in b9 => r9c13<>5
  31. Naked Triple: 5,6,7 in r13c2,r3c3 => r1c13,r3c1<>5, r1c13,r3c1<>6, r3c1<>7
  32. Row 3 / Column 1 → 8 (Naked Single)
  33. Row 1 / Column 7 → 8 (Hidden Single)
  34. Locked Candidates Type 2 (Claiming): 6 in c1 => r89c3<>6
  35. XY-Wing: 4/7/5 in r57c1,r8c3 => r45c3,r8c1<>5
  36. Row 8 / Column 3 → 5 (Hidden Single)
  37. Row 5 / Column 1 → 5 (Hidden Single)
  38. Row 5 / Column 6 → 3 (Naked Single)
  39. Row 4 / Column 6 → 5 (Full House)
  40. Row 5 / Column 3 → 7 (Full House)
  41. Row 3 / Column 3 → 6 (Naked Single)
  42. Row 1 / Column 2 → 5 (Naked Single)
  43. Row 3 / Column 5 → 1 (Naked Single)
  44. Row 1 / Column 5 → 6 (Full House)
  45. Row 4 / Column 3 → 3 (Naked Single)
  46. Row 4 / Column 2 → 6 (Full House)
  47. Row 1 / Column 9 → 1 (Naked Single)
  48. Row 3 / Column 7 → 5 (Full House)
  49. Row 3 / Column 2 → 7 (Full House)
  50. Row 7 / Column 2 → 3 (Full House)
  51. Row 7 / Column 9 → 9 (Naked Single)
  52. Row 9 / Column 9 → 5 (Full House)
  53. Row 9 / Column 7 → 4 (Naked Single)
  54. Row 7 / Column 7 → 1 (Full House)
  55. Row 7 / Column 3 → 4 (Naked Single)
  56. Row 7 / Column 1 → 7 (Full House)
  57. Row 9 / Column 4 → 6 (Naked Single)
  58. Row 8 / Column 4 → 4 (Full House)
  59. Row 8 / Column 1 → 6 (Full House)
  60. Row 1 / Column 3 → 2 (Naked Single)
  61. Row 1 / Column 1 → 4 (Full House)
  62. Row 9 / Column 1 → 2 (Full House)
  63. Row 9 / Column 3 → 9 (Full House)
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