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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Empty Rectangle, undefined, Hidden Rectangle, Sashimi Swordfish, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 2 → 8 (Hidden Single)
  2. Row 3 / Column 3 → 5 (Hidden Single)
  3. Row 7 / Column 1 → 5 (Hidden Single)
  4. Row 2 / Column 1 → 2 (Hidden Single)
  5. Row 1 / Column 5 → 2 (Hidden Single)
  6. Row 3 / Column 9 → 2 (Hidden Single)
  7. Row 4 / Column 1 → 4 (Hidden Single)
  8. Row 7 / Column 7 → 2 (Hidden Single)
  9. Row 9 / Column 2 → 2 (Hidden Single)
  10. Row 3 / Column 8 → 6 (Hidden Single)
  11. Row 5 / Column 3 → 2 (Hidden Single)
  12. Row 3 / Column 4 → 9 (Hidden Single)
  13. Row 2 / Column 7 → 9 (Hidden Single)
  14. Row 5 / Column 7 → 8 (Hidden Single)
  15. Row 4 / Column 3 → 8 (Hidden Single)
  16. Row 6 / Column 3 → 6 (Hidden Single)
  17. Row 4 / Column 9 → 6 (Hidden Single)
  18. Row 6 / Column 9 → 7 (Hidden Single)
  19. Row 1 / Column 9 → 5 (Hidden Single)
  20. Row 6 / Column 7 → 5 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 7 in b1 => r2c5<>7
  22. Locked Candidates Type 1 (Pointing): 1 in b4 => r7c2<>1
  23. Naked Pair: 1,3 in r5c28 => r5c456<>1, r5c456<>3
  24. Naked Pair: 1,3 in r15c8 => r79c8<>1, r79c8<>3
  25. Empty Rectangle: 1 in b9 (r2c59) => r8c5<>1
  26. W-Wing: 3/1 in r6c5,r9c9 connected by 1 in r2c59 => r9c5<>3
  27. Hidden Rectangle: 4/6 in r5c45,r7c45 => r7c5<>4
  28. Finned X-Wing: 1 r29 c59 fr9c4 fr9c6 => r7c5<>1
  29. Sashimi Swordfish: 1 r256 c258 fr2c9 => r1c8<>1
  30. Row 1 / Column 8 → 3 (Naked Single)
  31. Row 5 / Column 8 → 1 (Naked Single)
  32. Row 4 / Column 7 → 3 (Full House)
  33. Row 5 / Column 2 → 3 (Naked Single)
  34. Row 3 / Column 2 → 4 (Naked Single)
  35. Row 3 / Column 6 → 3 (Full House)
  36. Row 6 / Column 1 → 9 (Naked Single)
  37. Row 6 / Column 2 → 1 (Full House)
  38. Row 8 / Column 1 → 3 (Full House)
  39. Row 6 / Column 5 → 3 (Full House)
  40. Row 2 / Column 2 → 7 (Naked Single)
  41. Row 2 / Column 3 → 3 (Full House)
  42. Row 7 / Column 2 → 9 (Full House)
  43. Row 7 / Column 8 → 7 (Naked Single)
  44. Row 9 / Column 8 → 9 (Full House)
  45. Row 7 / Column 3 → 1 (Naked Single)
  46. Row 8 / Column 3 → 7 (Full House)
  47. Row 7 / Column 5 → 6 (Naked Single)
  48. Row 7 / Column 6 → 4 (Naked Single)
  49. Row 5 / Column 6 → 5 (Naked Single)
  50. Row 8 / Column 5 → 9 (Naked Single)
  51. Row 5 / Column 5 → 4 (Naked Single)
  52. Row 5 / Column 4 → 6 (Full House)
  53. Row 2 / Column 5 → 1 (Naked Single)
  54. Row 2 / Column 9 → 4 (Full House)
  55. Row 1 / Column 7 → 1 (Full House)
  56. Row 8 / Column 7 → 4 (Full House)
  57. Row 1 / Column 6 → 7 (Naked Single)
  58. Row 1 / Column 4 → 4 (Full House)
  59. Row 9 / Column 6 → 1 (Full House)
  60. Row 4 / Column 5 → 7 (Naked Single)
  61. Row 4 / Column 4 → 1 (Full House)
  62. Row 9 / Column 5 → 5 (Full House)
  63. Row 8 / Column 4 → 8 (Naked Single)
  64. Row 8 / Column 9 → 1 (Full House)
  65. Row 9 / Column 9 → 3 (Naked Single)
  66. Row 7 / Column 9 → 8 (Full House)
  67. Row 7 / Column 4 → 3 (Full House)
  68. Row 9 / Column 4 → 7 (Full House)
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