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

This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Remote Pair, Bivalue Universal Grave + 1 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 6 / Column 9 → 5 (Hidden Single)
  2. Row 8 / Column 9 → 7 (Naked Single)
  3. Row 8 / Column 7 → 8 (Hidden Single)
  4. Row 7 / Column 2 → 3 (Hidden Single)
  5. Row 9 / Column 2 → 6 (Hidden Single)
  6. Row 7 / Column 1 → 2 (Naked Single)
  7. Row 7 / Column 8 → 6 (Naked Single)
  8. Row 2 / Column 7 → 6 (Hidden Single)
  9. Row 9 / Column 5 → 4 (Hidden Single)
  10. Row 6 / Column 4 → 6 (Hidden Single)
  11. Row 8 / Column 6 → 6 (Hidden Single)
  12. Row 3 / Column 7 → 7 (Hidden Single)
  13. Row 4 / Column 1 → 6 (Hidden Single)
  14. Row 8 / Column 8 → 5 (Hidden Single)
  15. Row 4 / Column 6 → 8 (Hidden Single)
  16. Row 7 / Column 6 → 7 (Naked Single)
  17. Row 7 / Column 4 → 8 (Full House)
  18. Row 8 / Column 5 → 2 (Hidden Single)
  19. Row 4 / Column 7 → 2 (Hidden Single)
  20. Row 9 / Column 7 → 1 (Naked Single)
  21. Row 9 / Column 8 → 2 (Full House)
  22. Row 5 / Column 7 → 4 (Naked Single)
  23. Row 6 / Column 7 → 3 (Full House)
  24. Row 4 / Column 5 → 3 (Hidden Single)
  25. Row 3 / Column 6 → 3 (Hidden Single)
  26. Row 2 / Column 8 → 3 (Hidden Single)
  27. Row 5 / Column 6 → 2 (Hidden Single)
  28. Row 9 / Column 6 → 5 (Hidden Single)
  29. Row 9 / Column 4 → 9 (Full House)
  30. Locked Candidates Type 1 (Pointing): 9 in b5 => r6c13<>9
  31. Locked Candidates Type 2 (Claiming): 4 in c2 => r3c13<>4
  32. Naked Pair: 1,7 in r15c4 => r23c4<>1, r2c4<>7
  33. Locked Candidates Type 1 (Pointing): 1 in b2 => r1c8<>1
  34. X-Wing: 7 r15 c24 => r2c2<>7
  35. 2-String Kite: 1 in r3c8,r4c3 (connected by r4c9,r5c8) => r3c3<>1
  36. W-Wing: 9/1 in r1c6,r5c8 connected by 1 in r15c4 => r1c8<>9
  37. Row 1 / Column 8 → 4 (Naked Single)
  38. Row 3 / Column 2 → 4 (Hidden Single)
  39. Remote Pair: 9/1 r3c8 -1- r5c8 -9- r4c9 -1- r4c3 => r3c3<>9
  40. Row 3 / Column 3 → 2 (Naked Single)
  41. Row 3 / Column 4 → 5 (Naked Single)
  42. Row 2 / Column 4 → 2 (Naked Single)
  43. Row 2 / Column 1 → 5 (Hidden Single)
  44. Row 2 / Column 2 → 8 (Hidden Single)
  45. Row 5 / Column 1 → 8 (Hidden Single)
  46. X-Wing: 1 r24 c39 => r6c3<>1
  47. Bivalue Universal Grave + 1 => r2c3<>1, r2c3<>7
  48. Row 2 / Column 3 → 9 (Naked Single)
  49. Row 1 / Column 2 → 7 (Naked Single)
  50. Row 3 / Column 1 → 1 (Full House)
  51. Row 5 / Column 2 → 9 (Full House)
  52. Row 3 / Column 8 → 9 (Full House)
  53. Row 2 / Column 9 → 1 (Full House)
  54. Row 2 / Column 5 → 7 (Full House)
  55. Row 5 / Column 8 → 1 (Full House)
  56. Row 4 / Column 9 → 9 (Full House)
  57. Row 4 / Column 3 → 1 (Full House)
  58. Row 6 / Column 5 → 9 (Full House)
  59. Row 5 / Column 4 → 7 (Full House)
  60. Row 1 / Column 4 → 1 (Full House)
  61. Row 6 / Column 6 → 1 (Full House)
  62. Row 1 / Column 6 → 9 (Full House)
  63. Row 8 / Column 3 → 4 (Naked Single)
  64. Row 6 / Column 3 → 7 (Full House)
  65. Row 6 / Column 1 → 4 (Full House)
  66. Row 8 / Column 1 → 9 (Full House)
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