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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Sue de Coq, Hidden Rectangle, Simple Colors Trap, Naked Triple, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 5 → 6 (Hidden Single)
  2. Row 8 / Column 8 → 6 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 9 in b6 => r5c1345<>9
  4. Row 5 / Column 5 → 1 (Naked Single)
  5. Row 9 / Column 5 → 2 (Naked Single)
  6. Row 7 / Column 5 → 9 (Full House)
  7. Row 7 / Column 4 → 4 (Naked Single)
  8. Row 7 / Column 7 → 7 (Naked Single)
  9. Row 8 / Column 6 → 3 (Naked Single)
  10. Row 8 / Column 4 → 1 (Full House)
  11. Row 7 / Column 9 → 5 (Naked Single)
  12. Row 7 / Column 3 → 6 (Naked Single)
  13. Row 7 / Column 1 → 2 (Full House)
  14. Row 2 / Column 6 → 4 (Hidden Single)
  15. Locked Candidates Type 1 (Pointing): 7 in b3 => r5c9<>7
  16. Locked Candidates Type 2 (Claiming): 9 in c1 => r123c3,r2c2<>9
  17. Locked Candidates Type 2 (Claiming): 3 in c8 => r5c79<>3
  18. Locked Candidates Type 2 (Claiming): 4 in c8 => r5c79<>4
  19. Naked Pair: 5,9 in r4c26 => r4c3<>5, r4c3<>9
  20. Row 8 / Column 3 → 9 (Hidden Single)
  21. Row 8 / Column 2 → 8 (Naked Single)
  22. Row 8 / Column 9 → 4 (Full House)
  23. Row 2 / Column 3 → 8 (Hidden Single)
  24. Row 1 / Column 7 → 4 (Hidden Single)
  25. 2-String Kite: 5 in r2c4,r4c2 (connected by r4c6,r5c4) => r2c2<>5
  26. XYZ-Wing: 3/4/5 in r4c3,r5c14 => r5c3<>3
  27. Sue de Coq: r3c13 - {13579} (r3c6 - {59}, r1c3,r2c2 - {137}) => r1c1<>3, r3c79<>9
  28. Hidden Rectangle: 6/9 in r1c19,r2c19 => r2c9<>9
  29. Simple Colors Trap: 5 (r2c1,r3c6,r4c2,r5c4) / (r2c4,r4c6,r9c2) => r9c1<>5
  30. Row 9 / Column 1 → 4 (Naked Single)
  31. Naked Pair: 3,5 in r5c14 => r5c3<>5, r5c8<>3
  32. Naked Triple: 3,4,7 in r145c3 => r3c3<>3, r3c3<>7
  33. Row 3 / Column 9 → 7 (Hidden Single)
  34. Row 2 / Column 9 → 6 (Naked Single)
  35. Row 1 / Column 1 → 6 (Hidden Single)
  36. X-Wing: 5 r25 c14 => r3c1<>5
  37. Bivalue Universal Grave + 1 => r2c4<>5, r2c4<>7
  38. Row 2 / Column 4 → 9 (Naked Single)
  39. Row 1 / Column 4 → 7 (Naked Single)
  40. Row 3 / Column 6 → 5 (Full House)
  41. Row 4 / Column 6 → 9 (Full House)
  42. Row 2 / Column 1 → 5 (Naked Single)
  43. Row 2 / Column 7 → 1 (Naked Single)
  44. Row 2 / Column 2 → 7 (Full House)
  45. Row 6 / Column 4 → 3 (Naked Single)
  46. Row 5 / Column 4 → 5 (Full House)
  47. Row 1 / Column 3 → 3 (Naked Single)
  48. Row 1 / Column 9 → 9 (Full House)
  49. Row 3 / Column 7 → 3 (Full House)
  50. Row 3 / Column 3 → 1 (Naked Single)
  51. Row 3 / Column 1 → 9 (Full House)
  52. Row 5 / Column 1 → 3 (Full House)
  53. Row 4 / Column 2 → 5 (Naked Single)
  54. Row 6 / Column 2 → 9 (Naked Single)
  55. Row 6 / Column 8 → 7 (Full House)
  56. Row 9 / Column 2 → 1 (Full House)
  57. Row 9 / Column 3 → 5 (Full House)
  58. Row 4 / Column 3 → 4 (Naked Single)
  59. Row 4 / Column 8 → 3 (Full House)
  60. Row 5 / Column 8 → 4 (Full House)
  61. Row 5 / Column 3 → 7 (Full House)
  62. Row 5 / Column 9 → 8 (Naked Single)
  63. Row 5 / Column 7 → 9 (Full House)
  64. Row 9 / Column 7 → 8 (Full House)
  65. Row 9 / Column 9 → 3 (Full House)
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