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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), undefined, Naked Pair, Skyscraper, Hidden Rectangle, Simple Colors Trap, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 7 → 3 (Hidden Single)
  2. Row 4 / Column 1 → 8 (Hidden Single)
  3. Row 8 / Column 3 → 3 (Hidden Single)
  4. Row 9 / Column 1 → 9 (Naked Single)
  5. Row 7 / Column 7 → 1 (Hidden Single)
  6. Row 7 / Column 1 → 7 (Hidden Single)
  7. Row 6 / Column 6 → 7 (Hidden Single)
  8. Row 3 / Column 8 → 6 (Hidden Single)
  9. Row 9 / Column 7 → 8 (Hidden Single)
  10. Row 3 / Column 7 → 9 (Naked Single)
  11. Row 2 / Column 2 → 1 (Hidden Single)
  12. Row 4 / Column 9 → 3 (Hidden Single)
  13. Row 6 / Column 9 → 5 (Naked Single)
  14. Row 6 / Column 1 → 3 (Hidden Single)
  15. Row 9 / Column 6 → 3 (Hidden Single)
  16. Row 5 / Column 5 → 5 (Hidden Single)
  17. Row 4 / Column 5 → 1 (Hidden Single)
  18. Row 4 / Column 4 → 6 (Hidden Single)
  19. Row 8 / Column 5 → 6 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 2 in b5 => r6c2<>2
  21. Locked Candidates Type 1 (Pointing): 2 in b9 => r8c46<>2
  22. 2-String Kite: 4 in r4c6,r8c7 (connected by r4c8,r5c7) => r8c6<>4
  23. 2-String Kite: 4 in r5c3,r9c8 (connected by r7c3,r9c2) => r5c8<>4
  24. 2-String Kite: 4 in r5c7,r9c2 (connected by r8c7,r9c8) => r5c2<>4
  25. XY-Wing: 1/2/9 in r1c28,r5c8 => r5c2<>9
  26. Naked Pair: 2,6 in r5c12 => r5c3<>6
  27. Skyscraper: 9 in r1c2,r2c5 (connected by r6c25) => r1c4,r2c3<>9
  28. Hidden Rectangle: 5/9 in r2c46,r8c46 => r2c4<>9
  29. Simple Colors Trap: 4 (r4c6,r5c7,r6c2,r7c3) / (r4c8,r5c3,r7c6,r8c7) => r7c25<>4
  30. Row 7 / Column 5 → 2 (Naked Single)
  31. Row 6 / Column 4 → 2 (Hidden Single)
  32. Row 1 / Column 4 → 7 (Naked Single)
  33. Row 2 / Column 4 → 5 (Naked Single)
  34. Row 3 / Column 4 → 4 (Naked Single)
  35. Row 8 / Column 4 → 9 (Full House)
  36. Row 3 / Column 5 → 8 (Naked Single)
  37. Row 8 / Column 6 → 5 (Naked Single)
  38. Row 7 / Column 6 → 4 (Full House)
  39. Row 2 / Column 5 → 9 (Naked Single)
  40. Row 2 / Column 6 → 2 (Full House)
  41. Row 4 / Column 6 → 9 (Full House)
  42. Row 6 / Column 5 → 4 (Full House)
  43. Row 4 / Column 8 → 4 (Full House)
  44. Row 6 / Column 2 → 9 (Full House)
  45. Row 3 / Column 3 → 7 (Naked Single)
  46. Row 3 / Column 9 → 2 (Full House)
  47. Row 7 / Column 3 → 6 (Naked Single)
  48. Row 7 / Column 2 → 5 (Full House)
  49. Row 9 / Column 2 → 4 (Full House)
  50. Row 9 / Column 8 → 5 (Full House)
  51. Row 2 / Column 1 → 6 (Naked Single)
  52. Row 2 / Column 3 → 8 (Full House)
  53. Row 5 / Column 1 → 2 (Full House)
  54. Row 5 / Column 7 → 7 (Naked Single)
  55. Row 8 / Column 7 → 4 (Full House)
  56. Row 8 / Column 8 → 2 (Naked Single)
  57. Row 8 / Column 9 → 7 (Full House)
  58. Row 1 / Column 2 → 2 (Naked Single)
  59. Row 1 / Column 3 → 9 (Full House)
  60. Row 5 / Column 3 → 4 (Full House)
  61. Row 5 / Column 2 → 6 (Full House)
  62. Row 1 / Column 8 → 1 (Naked Single)
  63. Row 1 / Column 9 → 8 (Full House)
  64. Row 5 / Column 9 → 1 (Full House)
  65. Row 5 / Column 8 → 9 (Full House)
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