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

This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Naked Single, Full House, Naked Triple, undefined, Locked Candidates Type 1 (Pointing), Skyscraper techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 6 → 9 (Hidden Single)
  2. Row 1 / Column 6 → 1 (Hidden Single)
  3. Row 8 / Column 5 → 4 (Hidden Single)
  4. Row 3 / Column 6 → 7 (Hidden Single)
  5. Row 3 / Column 7 → 8 (Naked Single)
  6. Row 1 / Column 5 → 2 (Hidden Single)
  7. Row 1 / Column 4 → 8 (Naked Single)
  8. Row 2 / Column 5 → 3 (Naked Single)
  9. Row 3 / Column 4 → 6 (Full House)
  10. Row 5 / Column 4 → 3 (Naked Single)
  11. Row 7 / Column 4 → 5 (Naked Single)
  12. Row 9 / Column 4 → 2 (Full House)
  13. Row 7 / Column 6 → 3 (Hidden Single)
  14. Row 3 / Column 2 → 3 (Hidden Single)
  15. Row 3 / Column 3 → 4 (Hidden Single)
  16. Row 1 / Column 3 → 9 (Hidden Single)
  17. Naked Triple: 2,5,8 in r258c1 => r4c1<>2, r69c1<>5, r9c1<>8
  18. Row 9 / Column 1 → 4 (Naked Single)
  19. Row 4 / Column 2 → 4 (Hidden Single)
  20. Row 7 / Column 8 → 4 (Hidden Single)
  21. X-Wing: 5 r19 c28 => r5c28<>5
  22. 2-String Kite: 7 in r2c7,r5c2 (connected by r1c2,r2c3) => r5c7<>7
  23. XY-Chain: 1 1- r2c9 -5- r1c8 -7- r1c2 -5- r9c2 -6- r7c2 -1 => r7c9<>1
  24. Locked Candidates Type 1 (Pointing): 1 in b9 => r8c3<>1
  25. W-Wing: 6/8 in r7c9,r8c6 connected by 8 in r9c68 => r8c79<>6
  26. Row 7 / Column 9 → 6 (Hidden Single)
  27. Row 7 / Column 2 → 1 (Naked Single)
  28. Row 7 / Column 3 → 8 (Full House)
  29. Row 5 / Column 3 → 1 (Hidden Single)
  30. Row 2 / Column 1 → 8 (Hidden Single)
  31. W-Wing: 1/5 in r2c9,r8c7 connected by 5 in r19c8 => r2c7,r8c9<>1
  32. Row 2 / Column 9 → 1 (Hidden Single)
  33. Row 8 / Column 7 → 1 (Hidden Single)
  34. Skyscraper: 5 in r2c3,r5c1 (connected by r25c7) => r6c3<>5
  35. Row 5 / Column 1 → 5 (Hidden Single)
  36. Row 5 / Column 7 → 6 (Naked Single)
  37. Row 8 / Column 1 → 2 (Naked Single)
  38. Row 5 / Column 2 → 7 (Naked Single)
  39. Row 1 / Column 2 → 5 (Naked Single)
  40. Row 1 / Column 8 → 7 (Full House)
  41. Row 2 / Column 3 → 7 (Full House)
  42. Row 9 / Column 2 → 6 (Full House)
  43. Row 2 / Column 7 → 5 (Full House)
  44. Row 8 / Column 3 → 5 (Full House)
  45. Row 5 / Column 5 → 8 (Naked Single)
  46. Row 5 / Column 8 → 2 (Full House)
  47. Row 6 / Column 3 → 6 (Naked Single)
  48. Row 4 / Column 3 → 2 (Full House)
  49. Row 9 / Column 6 → 8 (Naked Single)
  50. Row 8 / Column 6 → 6 (Full House)
  51. Row 8 / Column 9 → 8 (Full House)
  52. Row 9 / Column 8 → 5 (Full House)
  53. Row 3 / Column 8 → 9 (Naked Single)
  54. Row 3 / Column 9 → 2 (Full House)
  55. Row 4 / Column 8 → 8 (Full House)
  56. Row 6 / Column 5 → 7 (Naked Single)
  57. Row 4 / Column 5 → 6 (Full House)
  58. Row 4 / Column 9 → 9 (Naked Single)
  59. Row 6 / Column 9 → 5 (Full House)
  60. Row 6 / Column 7 → 3 (Naked Single)
  61. Row 4 / Column 7 → 7 (Full House)
  62. Row 4 / Column 1 → 3 (Full House)
  63. Row 6 / Column 1 → 9 (Full House)
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