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.

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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