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

This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Swordfish, Naked Pair, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 1 → 7 (Hidden Single)
  2. Row 8 / Column 9 → 7 (Hidden Single)
  3. Row 8 / Column 2 → 1 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 5 in b5 => r6c79<>5
  5. Locked Candidates Type 1 (Pointing): 2 in b6 => r23c9<>2
  6. Locked Candidates Type 2 (Claiming): 3 in c2 => r13c3,r23c1<>3
  7. Naked Triple: 3,5,8 in r7c13,r8c1 => r9c3<>5, r9c3<>8
  8. Swordfish: 5 r258 c189 => r19c8,r7c19<>5
  9. Naked Pair: 4,8 in r9c58 => r9c46<>4, r9c67<>8
  10. Swordfish: 9 c258 r125 => r1c347,r25c9<>9
  11. Row 2 / Column 9 → 5 (Naked Single)
  12. Row 1 / Column 3 → 5 (Hidden Single)
  13. Row 8 / Column 1 → 5 (Hidden Single)
  14. Row 8 / Column 8 → 8 (Naked Single)
  15. Row 8 / Column 5 → 3 (Full House)
  16. Row 9 / Column 8 → 4 (Naked Single)
  17. Row 9 / Column 5 → 8 (Naked Single)
  18. Row 5 / Column 8 → 5 (Hidden Single)
  19. Row 1 / Column 7 → 8 (Hidden Single)
  20. Row 2 / Column 2 → 3 (Hidden Single)
  21. Row 5 / Column 9 → 8 (Hidden Single)
  22. Row 4 / Column 6 → 8 (Hidden Single)
  23. Row 3 / Column 7 → 3 (Hidden Single)
  24. Row 3 / Column 4 → 9 (Naked Single)
  25. Row 1 / Column 5 → 4 (Naked Single)
  26. Row 2 / Column 5 → 6 (Naked Single)
  27. Row 5 / Column 5 → 9 (Full House)
  28. Row 3 / Column 9 → 1 (Naked Single)
  29. Row 4 / Column 4 → 4 (Naked Single)
  30. Row 2 / Column 1 → 2 (Naked Single)
  31. Row 2 / Column 8 → 9 (Full House)
  32. Row 1 / Column 8 → 2 (Full House)
  33. Row 3 / Column 6 → 2 (Naked Single)
  34. Row 5 / Column 2 → 6 (Naked Single)
  35. Row 5 / Column 1 → 4 (Full House)
  36. Row 7 / Column 9 → 9 (Naked Single)
  37. Row 6 / Column 4 → 5 (Naked Single)
  38. Row 6 / Column 6 → 6 (Full House)
  39. Row 1 / Column 2 → 9 (Naked Single)
  40. Row 9 / Column 2 → 2 (Full House)
  41. Row 1 / Column 6 → 7 (Naked Single)
  42. Row 1 / Column 4 → 3 (Full House)
  43. Row 6 / Column 1 → 3 (Naked Single)
  44. Row 4 / Column 9 → 2 (Naked Single)
  45. Row 6 / Column 9 → 4 (Full House)
  46. Row 7 / Column 4 → 1 (Naked Single)
  47. Row 9 / Column 4 → 7 (Full House)
  48. Row 6 / Column 7 → 9 (Naked Single)
  49. Row 4 / Column 7 → 6 (Full House)
  50. Row 4 / Column 3 → 9 (Full House)
  51. Row 6 / Column 3 → 2 (Full House)
  52. Row 9 / Column 3 → 6 (Naked Single)
  53. Row 9 / Column 6 → 5 (Naked Single)
  54. Row 7 / Column 6 → 4 (Full House)
  55. Row 9 / Column 7 → 1 (Full House)
  56. Row 7 / Column 7 → 5 (Full House)
  57. Row 7 / Column 1 → 8 (Naked Single)
  58. Row 3 / Column 1 → 6 (Full House)
  59. Row 3 / Column 3 → 8 (Full House)
  60. Row 7 / Column 3 → 3 (Full House)
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