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

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

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 9 / Column 2 → 1 (Naked Single)
  2. Row 2 / Column 6 → 9 (Hidden Single)
  3. Row 6 / Column 9 → 9 (Hidden Single)
  4. Row 4 / Column 2 → 9 (Hidden Single)
  5. Row 7 / Column 4 → 9 (Hidden Single)
  6. Row 1 / Column 3 → 1 (Hidden Single)
  7. Row 8 / Column 8 → 9 (Hidden Single)
  8. Row 4 / Column 9 → 1 (Hidden Single)
  9. Row 5 / Column 2 → 4 (Hidden Single)
  10. Row 1 / Column 1 → 8 (Hidden Single)
  11. Row 6 / Column 4 → 4 (Hidden Single)
  12. Locked Candidates Type 1 (Pointing): 2 in b1 => r2c579<>2
  13. Row 2 / Column 5 → 7 (Naked Single)
  14. Row 3 / Column 2 → 7 (Hidden Single)
  15. Row 7 / Column 2 → 6 (Naked Single)
  16. Row 1 / Column 2 → 3 (Full House)
  17. Row 5 / Column 4 → 7 (Hidden Single)
  18. Row 7 / Column 6 → 7 (Hidden Single)
  19. Row 7 / Column 3 → 2 (Naked Single)
  20. Row 2 / Column 3 → 6 (Naked Single)
  21. Row 2 / Column 1 → 2 (Full House)
  22. Row 2 / Column 9 → 4 (Naked Single)
  23. Row 2 / Column 7 → 3 (Full House)
  24. Row 7 / Column 9 → 8 (Naked Single)
  25. Row 7 / Column 8 → 4 (Full House)
  26. Row 3 / Column 6 → 3 (Hidden Single)
  27. Row 9 / Column 6 → 8 (Hidden Single)
  28. Row 4 / Column 7 → 4 (Hidden Single)
  29. Row 5 / Column 8 → 3 (Hidden Single)
  30. Row 5 / Column 3 → 8 (Naked Single)
  31. Row 3 / Column 5 → 1 (Hidden Single)
  32. Row 6 / Column 6 → 1 (Hidden Single)
  33. Locked Candidates Type 1 (Pointing): 6 in b5 => r1c6<>6
  34. 2-String Kite: 2 in r5c7,r8c5 (connected by r4c5,r5c6) => r8c7<>2
  35. 2-String Kite: 2 in r4c5,r9c8 (connected by r8c5,r9c4) => r4c8<>2
  36. Row 5 / Column 7 → 2 (Hidden Single)
  37. Row 5 / Column 6 → 6 (Full House)
  38. 2-String Kite: 2 in r3c9,r9c4 (connected by r8c9,r9c8) => r3c4<>2
  39. Locked Candidates Type 1 (Pointing): 2 in b2 => r1c8<>2
  40. 2-String Kite: 5 in r3c7,r9c4 (connected by r8c7,r9c8) => r3c4<>5
  41. Row 3 / Column 4 → 6 (Naked Single)
  42. Row 3 / Column 9 → 2 (Naked Single)
  43. Row 8 / Column 9 → 6 (Full House)
  44. Row 8 / Column 7 → 5 (Naked Single)
  45. Row 9 / Column 8 → 2 (Full House)
  46. Row 9 / Column 4 → 5 (Full House)
  47. Row 8 / Column 5 → 2 (Full House)
  48. Row 1 / Column 4 → 2 (Full House)
  49. Row 1 / Column 6 → 5 (Full House)
  50. Row 1 / Column 8 → 6 (Full House)
  51. Row 4 / Column 6 → 2 (Full House)
  52. Row 3 / Column 7 → 8 (Naked Single)
  53. Row 3 / Column 8 → 5 (Full House)
  54. Row 4 / Column 8 → 8 (Full House)
  55. Row 6 / Column 7 → 6 (Full House)
  56. Row 4 / Column 5 → 5 (Naked Single)
  57. Row 6 / Column 5 → 8 (Full House)
  58. Row 6 / Column 1 → 3 (Naked Single)
  59. Row 6 / Column 3 → 5 (Full House)
  60. Row 4 / Column 3 → 7 (Naked Single)
  61. Row 4 / Column 1 → 6 (Full House)
  62. Row 8 / Column 1 → 7 (Full House)
  63. Row 8 / Column 3 → 3 (Full House)
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