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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Empty Rectangle, Sashimi Swordfish techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 7 → 2 (Naked Single)
  2. Row 6 / Column 6 → 7 (Naked Single)
  3. Row 1 / Column 7 → 7 (Naked Single)
  4. Row 6 / Column 2 → 2 (Naked Single)
  5. Row 7 / Column 7 → 8 (Naked Single)
  6. Row 6 / Column 1 → 6 (Naked Single)
  7. Row 6 / Column 8 → 8 (Naked Single)
  8. Row 6 / Column 9 → 3 (Naked Single)
  9. Row 6 / Column 4 → 5 (Full House)
  10. Row 4 / Column 3 → 8 (Hidden Single)
  11. Row 8 / Column 6 → 4 (Hidden Single)
  12. Row 9 / Column 5 → 8 (Hidden Single)
  13. Row 2 / Column 9 → 8 (Hidden Single)
  14. Row 5 / Column 5 → 3 (Hidden Single)
  15. Row 8 / Column 4 → 3 (Hidden Single)
  16. Row 4 / Column 9 → 4 (Hidden Single)
  17. Row 5 / Column 7 → 1 (Naked Single)
  18. Row 9 / Column 7 → 4 (Full House)
  19. Row 7 / Column 3 → 3 (Hidden Single)
  20. Row 1 / Column 2 → 3 (Hidden Single)
  21. Row 4 / Column 8 → 2 (Hidden Single)
  22. Row 7 / Column 1 → 5 (Hidden Single)
  23. Row 4 / Column 2 → 7 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 7 in b7 => r9c9<>7
  25. Naked Pair: 1,9 in r2c2,r3c1 => r1c13,r2c13,r3c3<>9, r2c1<>1
  26. Row 1 / Column 1 → 2 (Naked Single)
  27. Naked Pair: 5,6 in r13c3 => r2c3<>5, r2c3<>6
  28. Naked Pair: 1,9 in r2c26 => r2c458<>9, r2c5<>1
  29. Locked Candidates Type 1 (Pointing): 9 in b3 => r789c9<>9
  30. Empty Rectangle: 9 in b2 (r28c2) => r8c5<>9
  31. Row 8 / Column 5 → 7 (Naked Single)
  32. Sashimi Swordfish: 9 r278 c258 fr2c6 => r13c5<>9
  33. Row 1 / Column 9 → 9 (Hidden Single)
  34. Row 2 / Column 6 → 9 (Hidden Single)
  35. Row 4 / Column 6 → 1 (Full House)
  36. Row 2 / Column 2 → 1 (Naked Single)
  37. Row 8 / Column 2 → 9 (Full House)
  38. Row 3 / Column 1 → 9 (Naked Single)
  39. Row 8 / Column 8 → 5 (Naked Single)
  40. Row 8 / Column 9 → 1 (Full House)
  41. Row 9 / Column 3 → 7 (Naked Single)
  42. Row 9 / Column 1 → 1 (Full House)
  43. Row 5 / Column 1 → 4 (Naked Single)
  44. Row 2 / Column 1 → 7 (Full House)
  45. Row 5 / Column 3 → 9 (Full House)
  46. Row 2 / Column 8 → 6 (Naked Single)
  47. Row 3 / Column 9 → 5 (Full House)
  48. Row 9 / Column 9 → 2 (Naked Single)
  49. Row 9 / Column 4 → 9 (Full House)
  50. Row 7 / Column 5 → 2 (Full House)
  51. Row 2 / Column 3 → 4 (Naked Single)
  52. Row 2 / Column 4 → 2 (Naked Single)
  53. Row 4 / Column 4 → 6 (Full House)
  54. Row 2 / Column 5 → 5 (Full House)
  55. Row 4 / Column 5 → 9 (Full House)
  56. Row 5 / Column 8 → 7 (Naked Single)
  57. Row 5 / Column 9 → 6 (Full House)
  58. Row 7 / Column 9 → 7 (Full House)
  59. Row 7 / Column 8 → 9 (Full House)
  60. Row 3 / Column 3 → 6 (Naked Single)
  61. Row 1 / Column 3 → 5 (Full House)
  62. Row 1 / Column 5 → 6 (Full House)
  63. Row 3 / Column 5 → 1 (Full House)
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