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

This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Turbot Fish, undefined 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 4 → 7 (Hidden Single)
  2. Row 6 / Column 7 → 7 (Hidden Single)
  3. Row 1 / Column 9 → 7 (Hidden Single)
  4. Row 8 / Column 8 → 9 (Hidden Single)
  5. Row 2 / Column 6 → 1 (Hidden Single)
  6. Row 3 / Column 4 → 5 (Naked Single)
  7. Row 7 / Column 6 → 5 (Naked Single)
  8. Row 6 / Column 4 → 1 (Naked Single)
  9. Row 8 / Column 4 → 3 (Naked Single)
  10. Row 4 / Column 4 → 9 (Full House)
  11. Row 8 / Column 6 → 2 (Naked Single)
  12. Row 6 / Column 6 → 8 (Naked Single)
  13. Row 4 / Column 6 → 3 (Full House)
  14. Row 6 / Column 5 → 6 (Hidden Single)
  15. Row 4 / Column 5 → 5 (Naked Single)
  16. Row 5 / Column 5 → 2 (Full House)
  17. Row 4 / Column 9 → 6 (Hidden Single)
  18. Row 4 / Column 1 → 1 (Hidden Single)
  19. Row 9 / Column 2 → 9 (Hidden Single)
  20. Row 9 / Column 5 → 1 (Naked Single)
  21. Row 8 / Column 5 → 7 (Naked Single)
  22. Row 7 / Column 5 → 9 (Full House)
  23. Row 1 / Column 8 → 3 (Hidden Single)
  24. Row 6 / Column 2 → 2 (Hidden Single)
  25. Row 7 / Column 1 → 7 (Hidden Single)
  26. Row 3 / Column 1 → 3 (Hidden Single)
  27. Row 7 / Column 3 → 4 (Hidden Single)
  28. Row 3 / Column 3 → 2 (Hidden Single)
  29. Row 9 / Column 1 → 2 (Hidden Single)
  30. Row 8 / Column 3 → 1 (Hidden Single)
  31. Locked Candidates Type 1 (Pointing): 4 in b6 => r2c8<>4
  32. Locked Candidates Type 1 (Pointing): 8 in b7 => r8c7<>8
  33. Locked Candidates Type 2 (Claiming): 4 in r2 => r1c1<>4
  34. Naked Pair: 1,8 in r37c9 => r5c9<>8
  35. Turbot Fish: 5 r1c7 =5= r2c8 -5- r6c8 =5= r6c1 => r1c1<>5
  36. 2-String Kite: 5 in r1c7,r8c2 (connected by r1c3,r2c2) => r8c7<>5
  37. Row 8 / Column 7 → 6 (Naked Single)
  38. Row 2 / Column 1 → 6 (Hidden Single)
  39. Row 9 / Column 3 → 6 (Hidden Single)
  40. Row 2 / Column 2 → 4 (Hidden Single)
  41. Row 4 / Column 2 → 8 (Naked Single)
  42. Row 4 / Column 8 → 4 (Full House)
  43. Row 8 / Column 2 → 5 (Full House)
  44. Row 8 / Column 1 → 8 (Full House)
  45. Row 6 / Column 8 → 5 (Naked Single)
  46. Row 2 / Column 8 → 8 (Full House)
  47. Row 6 / Column 1 → 4 (Full House)
  48. Row 2 / Column 3 → 5 (Full House)
  49. Row 1 / Column 1 → 9 (Naked Single)
  50. Row 1 / Column 3 → 8 (Full House)
  51. Row 5 / Column 3 → 9 (Full House)
  52. Row 5 / Column 1 → 5 (Full House)
  53. Row 5 / Column 9 → 3 (Naked Single)
  54. Row 5 / Column 7 → 8 (Full House)
  55. Row 3 / Column 9 → 1 (Naked Single)
  56. Row 1 / Column 5 → 4 (Naked Single)
  57. Row 1 / Column 7 → 5 (Full House)
  58. Row 3 / Column 7 → 4 (Full House)
  59. Row 3 / Column 5 → 8 (Full House)
  60. Row 9 / Column 9 → 5 (Naked Single)
  61. Row 7 / Column 9 → 8 (Full House)
  62. Row 7 / Column 7 → 1 (Full House)
  63. Row 9 / Column 7 → 3 (Full House)
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