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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Naked Pair, undefined, Full House, Swordfish 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 1 / Column 7 → 1 (Hidden Single)
  2. Row 4 / Column 4 → 2 (Hidden Single)
  3. Row 8 / Column 1 → 7 (Hidden Single)
  4. Row 4 / Column 6 → 7 (Hidden Single)
  5. Row 4 / Column 7 → 4 (Naked Single)
  6. Locked Candidates Type 1 (Pointing): 3 in b5 => r6c13<>3
  7. Locked Candidates Type 1 (Pointing): 9 in b6 => r78c9<>9
  8. Locked Candidates Type 2 (Claiming): 2 in r3 => r2c9<>2
  9. Locked Candidates Type 2 (Claiming): 3 in c3 => r7c1,r9c2<>3
  10. Naked Triple: 4,8,9 in r7c1,r89c2 => r7c3<>4, r79c3<>8, r79c3<>9
  11. Naked Triple: 2,6,8 in r7c79,r8c9 => r89c8,r9c7<>6
  12. Row 8 / Column 8 → 9 (Naked Single)
  13. Row 2 / Column 8 → 6 (Hidden Single)
  14. Row 2 / Column 9 → 5 (Naked Single)
  15. Row 3 / Column 6 → 6 (Hidden Single)
  16. Row 1 / Column 8 → 4 (Hidden Single)
  17. Row 1 / Column 6 → 5 (Naked Single)
  18. Row 1 / Column 4 → 7 (Hidden Single)
  19. Naked Pair: 8,9 in r14c3 => r36c3<>9
  20. X-Wing: 9 r37 c14 => r46c1,r9c4<>9
  21. Row 6 / Column 9 → 9 (Hidden Single)
  22. Row 4 / Column 9 → 1 (Naked Single)
  23. Row 4 / Column 1 → 8 (Naked Single)
  24. Row 4 / Column 3 → 9 (Full House)
  25. Row 5 / Column 9 → 7 (Naked Single)
  26. Row 1 / Column 3 → 8 (Naked Single)
  27. Row 3 / Column 9 → 2 (Naked Single)
  28. Row 3 / Column 7 → 7 (Full House)
  29. Row 5 / Column 8 → 5 (Naked Single)
  30. Row 6 / Column 7 → 6 (Full House)
  31. Row 9 / Column 8 → 7 (Full House)
  32. Row 9 / Column 7 → 5 (Naked Single)
  33. Row 7 / Column 7 → 2 (Full House)
  34. Swordfish: 4 r258 c125 => r367c1<>4
  35. Row 7 / Column 1 → 9 (Naked Single)
  36. Row 3 / Column 1 → 5 (Naked Single)
  37. Row 9 / Column 2 → 8 (Naked Single)
  38. Row 3 / Column 3 → 4 (Naked Single)
  39. Row 3 / Column 4 → 9 (Full House)
  40. Row 6 / Column 1 → 1 (Naked Single)
  41. Row 8 / Column 2 → 4 (Naked Single)
  42. Row 9 / Column 4 → 3 (Naked Single)
  43. Row 2 / Column 1 → 3 (Naked Single)
  44. Row 5 / Column 1 → 4 (Full House)
  45. Row 6 / Column 3 → 5 (Naked Single)
  46. Row 5 / Column 2 → 3 (Full House)
  47. Row 5 / Column 5 → 1 (Full House)
  48. Row 1 / Column 5 → 2 (Naked Single)
  49. Row 1 / Column 2 → 9 (Full House)
  50. Row 2 / Column 2 → 2 (Full House)
  51. Row 2 / Column 5 → 4 (Full House)
  52. Row 8 / Column 5 → 6 (Naked Single)
  53. Row 8 / Column 9 → 8 (Full House)
  54. Row 9 / Column 5 → 9 (Full House)
  55. Row 7 / Column 9 → 6 (Full House)
  56. Row 6 / Column 4 → 4 (Naked Single)
  57. Row 6 / Column 6 → 3 (Full House)
  58. Row 7 / Column 4 → 8 (Full House)
  59. Row 7 / Column 6 → 4 (Naked Single)
  60. Row 9 / Column 6 → 1 (Full House)
  61. Row 9 / Column 3 → 6 (Full House)
  62. Row 7 / Column 3 → 3 (Full House)
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