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

This Sudoku Puzzle has 69 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Pair, Empty Rectangle, Continuous Nice Loop, Naked Pair, Naked Triple, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 4 → 8 (Hidden Single)
  2. Row 5 / Column 8 → 8 (Hidden Single)
  3. Row 4 / Column 5 → 5 (Hidden Single)
  4. Row 2 / Column 9 → 5 (Hidden Single)
  5. Row 3 / Column 8 → 9 (Hidden Single)
  6. Row 4 / Column 4 → 7 (Hidden Single)
  7. Row 9 / Column 5 → 7 (Hidden Single)
  8. Row 9 / Column 3 → 8 (Hidden Single)
  9. Row 8 / Column 5 → 8 (Hidden Single)
  10. Row 6 / Column 1 → 8 (Hidden Single)
  11. Row 7 / Column 7 → 8 (Hidden Single)
  12. Row 8 / Column 1 → 6 (Hidden Single)
  13. Row 2 / Column 5 → 6 (Hidden Single)
  14. Row 7 / Column 8 → 2 (Hidden Single)
  15. Row 1 / Column 8 → 4 (Naked Single)
  16. Row 9 / Column 8 → 6 (Full House)
  17. Row 4 / Column 2 → 6 (Hidden Single)
  18. Row 3 / Column 5 → 3 (Hidden Single)
  19. Row 7 / Column 4 → 6 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 2 in b2 => r5c4<>2
  21. Locked Candidates Type 1 (Pointing): 2 in b3 => r46c7<>2
  22. Locked Candidates Type 1 (Pointing): 3 in b3 => r8c7<>3
  23. Row 8 / Column 9 → 3 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 4 in b5 => r5c2<>4
  25. Locked Candidates Type 2 (Claiming): 1 in c5 => r5c46<>1
  26. Hidden Pair: 5,7 in r17c3 => r17c3<>1, r1c3<>2
  27. Empty Rectangle: 4 in b4 (r8c37) => r4c7<>4
  28. Continuous Nice Loop: 1/2 5= r3c2 =4= r9c2 =3= r9c6 =9= r5c6 =4= r3c6 =5= r3c2 =4 => r3c26,r9c26<>1, r3c2<>2
  29. Naked Pair: 4,5 in r3c26 => r3c14<>4
  30. Naked Triple: 1,3,7 in r137c1 => r2c1<>3, r4c1<>1
  31. Row 2 / Column 7 → 3 (Hidden Single)
  32. 2-String Kite: 1 in r3c1,r7c6 (connected by r1c6,r3c4) => r7c1<>1
  33. Locked Candidates Type 2 (Claiming): 1 in c1 => r1c2<>1
  34. XY-Wing: 5/7/1 in r1c36,r3c1 => r1c1,r3c4<>1
  35. Row 3 / Column 4 → 2 (Naked Single)
  36. Row 2 / Column 4 → 4 (Naked Single)
  37. Row 3 / Column 7 → 7 (Naked Single)
  38. Row 1 / Column 7 → 2 (Full House)
  39. Row 2 / Column 1 → 9 (Naked Single)
  40. Row 2 / Column 3 → 2 (Full House)
  41. Row 3 / Column 6 → 5 (Naked Single)
  42. Row 1 / Column 6 → 1 (Full House)
  43. Row 5 / Column 4 → 9 (Naked Single)
  44. Row 9 / Column 4 → 1 (Full House)
  45. Row 3 / Column 1 → 1 (Naked Single)
  46. Row 3 / Column 2 → 4 (Full House)
  47. Row 4 / Column 1 → 4 (Naked Single)
  48. Row 7 / Column 6 → 3 (Naked Single)
  49. Row 9 / Column 6 → 9 (Full House)
  50. Row 5 / Column 6 → 4 (Full House)
  51. Row 9 / Column 9 → 4 (Naked Single)
  52. Row 9 / Column 2 → 3 (Full House)
  53. Row 8 / Column 7 → 1 (Full House)
  54. Row 8 / Column 3 → 4 (Full House)
  55. Row 7 / Column 1 → 7 (Naked Single)
  56. Row 1 / Column 1 → 3 (Full House)
  57. Row 1 / Column 2 → 5 (Naked Single)
  58. Row 1 / Column 3 → 7 (Full House)
  59. Row 4 / Column 7 → 9 (Naked Single)
  60. Row 6 / Column 7 → 4 (Full House)
  61. Row 7 / Column 3 → 5 (Naked Single)
  62. Row 7 / Column 2 → 1 (Full House)
  63. Row 5 / Column 2 → 2 (Full House)
  64. Row 5 / Column 5 → 1 (Full House)
  65. Row 6 / Column 5 → 2 (Full House)
  66. Row 4 / Column 3 → 1 (Naked Single)
  67. Row 4 / Column 9 → 2 (Full House)
  68. Row 6 / Column 9 → 1 (Full House)
  69. Row 6 / Column 3 → 9 (Full House)
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