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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Locked Pair, Full House, Naked Triple, Remote Pair, 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 8 / Column 6 → 7 (Hidden Single)
  2. Row 7 / Column 2 → 6 (Hidden Single)
  3. Row 8 / Column 5 → 6 (Hidden Single)
  4. Row 7 / Column 3 → 8 (Hidden Single)
  5. Row 9 / Column 4 → 9 (Hidden Single)
  6. Locked Candidates Type 1 (Pointing): 7 in b4 => r3c1<>7
  7. Locked Candidates Type 1 (Pointing): 8 in b4 => r23c1<>8
  8. Locked Candidates Type 2 (Claiming): 5 in r8 => r9c12<>5
  9. Row 9 / Column 2 → 3 (Naked Single)
  10. Row 5 / Column 2 → 9 (Naked Single)
  11. Row 3 / Column 8 → 9 (Hidden Single)
  12. Row 1 / Column 3 → 9 (Hidden Single)
  13. Row 2 / Column 7 → 6 (Hidden Single)
  14. Locked Pair: 3,5 in r46c3 => r2c3,r456c1<>3, r28c3,r46c1<>5
  15. Row 5 / Column 1 → 1 (Naked Single)
  16. Row 2 / Column 1 → 3 (Hidden Single)
  17. Row 8 / Column 1 → 5 (Hidden Single)
  18. Row 3 / Column 1 → 2 (Naked Single)
  19. Row 2 / Column 3 → 4 (Naked Single)
  20. Row 3 / Column 5 → 5 (Naked Single)
  21. Row 9 / Column 1 → 4 (Naked Single)
  22. Row 8 / Column 3 → 2 (Full House)
  23. Row 8 / Column 9 → 9 (Naked Single)
  24. Row 8 / Column 7 → 4 (Full House)
  25. Row 4 / Column 9 → 7 (Naked Single)
  26. Row 4 / Column 7 → 9 (Naked Single)
  27. Row 4 / Column 1 → 8 (Naked Single)
  28. Row 6 / Column 1 → 7 (Full House)
  29. Row 2 / Column 2 → 5 (Hidden Single)
  30. Row 6 / Column 5 → 9 (Hidden Single)
  31. Locked Pair: 1,2 in r6c79 => r56c8,r6c46<>2, r6c8<>1
  32. Naked Triple: 2,3,4 in r4c5,r5c46 => r46c6<>3, r4c6<>4
  33. Naked Triple: 5,6,8 in r346c6 => r1c6<>8, r79c6<>5
  34. Row 9 / Column 8 → 5 (Hidden Single)
  35. Row 7 / Column 4 → 5 (Hidden Single)
  36. Remote Pair: 1/2 r1c8 -2- r7c8 -1- r9c7 -2- r9c6 => r1c6<>1, r1c6<>2
  37. Locked Candidates Type 1 (Pointing): 1 in b2 => r7c5<>1
  38. W-Wing: 3/4 in r1c6,r4c5 connected by 4 in r7c56 => r1c5,r5c6<>3
  39. Row 1 / Column 6 → 3 (Hidden Single)
  40. Row 4 / Column 5 → 3 (Hidden Single)
  41. Row 4 / Column 3 → 5 (Naked Single)
  42. Row 6 / Column 3 → 3 (Full House)
  43. Row 4 / Column 6 → 6 (Naked Single)
  44. Row 4 / Column 8 → 4 (Full House)
  45. Row 6 / Column 8 → 6 (Naked Single)
  46. Row 3 / Column 6 → 8 (Naked Single)
  47. Row 6 / Column 4 → 8 (Naked Single)
  48. Row 5 / Column 8 → 3 (Naked Single)
  49. Row 2 / Column 4 → 2 (Naked Single)
  50. Row 3 / Column 2 → 7 (Naked Single)
  51. Row 1 / Column 2 → 8 (Full House)
  52. Row 3 / Column 4 → 6 (Full House)
  53. Row 6 / Column 6 → 5 (Naked Single)
  54. Row 2 / Column 5 → 1 (Naked Single)
  55. Row 2 / Column 9 → 8 (Full House)
  56. Row 5 / Column 4 → 4 (Naked Single)
  57. Row 1 / Column 4 → 7 (Full House)
  58. Row 1 / Column 5 → 4 (Full House)
  59. Row 5 / Column 6 → 2 (Full House)
  60. Row 7 / Column 5 → 2 (Full House)
  61. Row 9 / Column 6 → 1 (Naked Single)
  62. Row 7 / Column 6 → 4 (Full House)
  63. Row 7 / Column 8 → 1 (Full House)
  64. Row 9 / Column 7 → 2 (Full House)
  65. Row 1 / Column 8 → 2 (Full House)
  66. Row 6 / Column 7 → 1 (Full House)
  67. Row 1 / Column 9 → 1 (Full House)
  68. Row 6 / Column 9 → 2 (Full House)
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