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

This Sudoku Puzzle has 69 steps and it is solved using Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Naked Single, Locked Candidates Type 2 (Claiming), undefined, Naked Pair, Full House 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 5 / Column 8 → 5 (Hidden Single)
  2. Row 5 / Column 6 → 9 (Hidden Single)
  3. Row 8 / Column 5 → 4 (Hidden Single)
  4. Row 4 / Column 9 → 4 (Hidden Single)
  5. Row 2 / Column 5 → 5 (Hidden Single)
  6. Row 7 / Column 4 → 5 (Hidden Single)
  7. Locked Pair: 6,8 in r8c79 => r7c78,r8c168,r9c8<>6, r8c138,r9c8<>8
  8. Locked Candidates Type 1 (Pointing): 9 in b4 => r23c1<>9
  9. Locked Candidates Type 1 (Pointing): 8 in b5 => r13c4<>8
  10. Locked Pair: 1,3 in r3c45 => r1c46,r23c6,r3c128<>1, r1c46,r3c16<>3
  11. Row 1 / Column 1 → 3 (Hidden Single)
  12. Row 9 / Column 6 → 3 (Hidden Single)
  13. Row 1 / Column 3 → 5 (Hidden Single)
  14. Row 8 / Column 1 → 5 (Hidden Single)
  15. Row 7 / Column 3 → 4 (Hidden Single)
  16. Row 7 / Column 7 → 9 (Naked Single)
  17. Row 1 / Column 7 → 4 (Hidden Single)
  18. Row 9 / Column 8 → 4 (Hidden Single)
  19. Row 3 / Column 2 → 4 (Hidden Single)
  20. Row 3 / Column 8 → 9 (Hidden Single)
  21. Row 2 / Column 2 → 9 (Hidden Single)
  22. Row 6 / Column 9 → 9 (Hidden Single)
  23. Row 4 / Column 1 → 9 (Hidden Single)
  24. Row 7 / Column 2 → 7 (Hidden Single)
  25. Row 7 / Column 8 → 2 (Naked Single)
  26. Row 8 / Column 8 → 7 (Naked Single)
  27. Locked Candidates Type 1 (Pointing): 6 in b6 => r6c45<>6
  28. Row 5 / Column 5 → 6 (Hidden Single)
  29. Locked Candidates Type 2 (Claiming): 2 in c5 => r6c4<>2
  30. X-Wing: 2 c24 r19 => r1c6,r9c1<>2
  31. W-Wing: 8/1 in r4c8,r5c2 connected by 1 in r1c28 => r4c3<>8
  32. Locked Candidates Type 2 (Claiming): 8 in r4 => r6c78<>8
  33. Naked Pair: 1,2 in r48c3 => r26c3<>1, r26c3<>2
  34. Naked Pair: 7,8 in r2c3,r3c1 => r1c2,r2c1<>8, r2c1<>7
  35. W-Wing: 1/2 in r1c2,r4c3 connected by 2 in r26c1 => r5c2<>1
  36. Row 5 / Column 2 → 8 (Naked Single)
  37. Row 5 / Column 4 → 1 (Full House)
  38. Row 6 / Column 3 → 7 (Naked Single)
  39. Row 9 / Column 2 → 2 (Naked Single)
  40. Row 1 / Column 2 → 1 (Full House)
  41. Row 3 / Column 4 → 3 (Naked Single)
  42. Row 2 / Column 3 → 8 (Naked Single)
  43. Row 8 / Column 3 → 1 (Naked Single)
  44. Row 4 / Column 3 → 2 (Full House)
  45. Row 6 / Column 1 → 1 (Full House)
  46. Row 9 / Column 4 → 6 (Naked Single)
  47. Row 9 / Column 1 → 8 (Full House)
  48. Row 7 / Column 1 → 6 (Full House)
  49. Row 7 / Column 6 → 1 (Full House)
  50. Row 8 / Column 6 → 2 (Full House)
  51. Row 2 / Column 1 → 2 (Naked Single)
  52. Row 3 / Column 1 → 7 (Full House)
  53. Row 3 / Column 5 → 1 (Naked Single)
  54. Row 3 / Column 6 → 8 (Full House)
  55. Row 6 / Column 4 → 8 (Naked Single)
  56. Row 1 / Column 4 → 2 (Full House)
  57. Row 2 / Column 9 → 6 (Naked Single)
  58. Row 8 / Column 9 → 8 (Full House)
  59. Row 8 / Column 7 → 6 (Full House)
  60. Row 4 / Column 5 → 3 (Naked Single)
  61. Row 6 / Column 5 → 2 (Full House)
  62. Row 6 / Column 8 → 6 (Naked Single)
  63. Row 6 / Column 7 → 3 (Full House)
  64. Row 1 / Column 6 → 6 (Naked Single)
  65. Row 1 / Column 8 → 8 (Full House)
  66. Row 2 / Column 6 → 7 (Full House)
  67. Row 2 / Column 7 → 1 (Full House)
  68. Row 4 / Column 8 → 1 (Full House)
  69. Row 4 / Column 7 → 8 (Full House)
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