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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Turbot Fish, Sue de Coq techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 3 → 8 (Hidden Single)
  2. Row 4 / Column 2 → 3 (Hidden Single)
  3. Row 7 / Column 5 → 3 (Hidden Single)
  4. Row 6 / Column 8 → 5 (Hidden Single)
  5. Row 7 / Column 1 → 4 (Hidden Single)
  6. Row 8 / Column 9 → 5 (Hidden Single)
  7. Row 4 / Column 8 → 4 (Hidden Single)
  8. Row 8 / Column 8 → 2 (Hidden Single)
  9. Row 8 / Column 1 → 6 (Naked Single)
  10. Row 8 / Column 2 → 7 (Naked Single)
  11. Row 8 / Column 4 → 1 (Naked Single)
  12. Row 8 / Column 6 → 8 (Full House)
  13. Row 4 / Column 6 → 7 (Hidden Single)
  14. Row 9 / Column 7 → 8 (Hidden Single)
  15. Row 2 / Column 8 → 7 (Hidden Single)
  16. Row 7 / Column 8 → 6 (Naked Single)
  17. Row 1 / Column 8 → 8 (Full House)
  18. Row 3 / Column 3 → 7 (Hidden Single)
  19. Row 2 / Column 6 → 1 (Hidden Single)
  20. Row 9 / Column 5 → 7 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 9 in b5 => r6c2<>9
  22. Locked Candidates Type 2 (Claiming): 9 in c2 => r1c13,r2c1<>9
  23. Locked Candidates Type 2 (Claiming): 4 in c5 => r13c6,r3c4<>4
  24. Naked Pair: 2,6 in r4c3,r6c2 => r5c13<>2, r5c3<>6
  25. Naked Pair: 2,6 in r4c4,r5c5 => r6c4<>2, r6c46<>6
  26. 2-String Kite: 6 in r1c3,r6c7 (connected by r4c3,r6c2) => r1c7<>6
  27. Turbot Fish: 6 r1c3 =6= r4c3 -6- r4c4 =6= r5c5 => r1c5<>6
  28. Sue de Coq: r2c45 - {3689} (r2c1 - {38}, r13c6 - {569}) => r3c45<>6
  29. XY-Chain: 2 2- r3c4 -3- r3c7 -6- r6c7 -2- r6c2 -6- r4c3 -2- r4c4 -6- r5c5 -2 => r13c5,r4c4<>2
  30. Row 1 / Column 5 → 4 (Naked Single)
  31. Row 4 / Column 4 → 6 (Naked Single)
  32. Row 4 / Column 3 → 2 (Full House)
  33. Row 3 / Column 5 → 8 (Naked Single)
  34. Row 5 / Column 5 → 2 (Naked Single)
  35. Row 2 / Column 5 → 6 (Full House)
  36. Row 9 / Column 4 → 4 (Naked Single)
  37. Row 9 / Column 6 → 6 (Full House)
  38. Row 6 / Column 2 → 6 (Naked Single)
  39. Row 2 / Column 2 → 9 (Naked Single)
  40. Row 1 / Column 2 → 2 (Full House)
  41. Row 3 / Column 6 → 5 (Naked Single)
  42. Row 6 / Column 4 → 9 (Naked Single)
  43. Row 6 / Column 6 → 4 (Full House)
  44. Row 6 / Column 7 → 2 (Full House)
  45. Row 1 / Column 6 → 9 (Full House)
  46. Row 2 / Column 4 → 3 (Naked Single)
  47. Row 2 / Column 1 → 8 (Full House)
  48. Row 3 / Column 4 → 2 (Full House)
  49. Row 3 / Column 1 → 3 (Naked Single)
  50. Row 1 / Column 1 → 5 (Naked Single)
  51. Row 1 / Column 3 → 6 (Full House)
  52. Row 3 / Column 7 → 6 (Naked Single)
  53. Row 3 / Column 9 → 4 (Full House)
  54. Row 5 / Column 1 → 9 (Naked Single)
  55. Row 5 / Column 3 → 5 (Full House)
  56. Row 9 / Column 1 → 2 (Full House)
  57. Row 1 / Column 9 → 1 (Naked Single)
  58. Row 1 / Column 7 → 3 (Full House)
  59. Row 5 / Column 7 → 7 (Naked Single)
  60. Row 5 / Column 9 → 6 (Full House)
  61. Row 7 / Column 7 → 1 (Full House)
  62. Row 9 / Column 9 → 9 (Naked Single)
  63. Row 7 / Column 9 → 7 (Full House)
  64. Row 7 / Column 3 → 9 (Full House)
  65. Row 9 / Column 3 → 1 (Full House)
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