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

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

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 6 → 5 (Naked Single)
  2. Row 3 / Column 6 → 8 (Naked Single)
  3. Row 2 / Column 6 → 6 (Naked Single)
  4. Row 8 / Column 6 → 1 (Naked Single)
  5. Row 5 / Column 6 → 7 (Full House)
  6. Row 7 / Column 8 → 7 (Hidden Single)
  7. Row 9 / Column 9 → 1 (Naked Single)
  8. Row 9 / Column 7 → 5 (Naked Single)
  9. Row 9 / Column 8 → 6 (Naked Single)
  10. Row 9 / Column 5 → 7 (Hidden Single)
  11. Row 2 / Column 1 → 8 (Hidden Single)
  12. Row 9 / Column 1 → 9 (Naked Single)
  13. Row 9 / Column 3 → 8 (Full House)
  14. Row 2 / Column 9 → 7 (Hidden Single)
  15. Row 3 / Column 8 → 1 (Hidden Single)
  16. Row 2 / Column 8 → 5 (Hidden Single)
  17. Row 1 / Column 9 → 4 (Hidden Single)
  18. Row 2 / Column 5 → 4 (Hidden Single)
  19. Locked Pair: 2,3 in r4c89 => r4c137,r5c7<>2, r4c13457,r5c7,r6c8<>3
  20. Row 6 / Column 8 → 4 (Naked Single)
  21. Locked Candidates Type 1 (Pointing): 3 in b2 => r56c5<>3
  22. X-Wing: 2 r27 c47 => r18c7,r8c4<>2
  23. Hidden Rectangle: 7/9 in r1c23,r4c23 => r4c3<>9
  24. 2-String Kite: 9 in r3c5,r6c3 (connected by r1c3,r3c2) => r6c5<>9
  25. XY-Chain: 9 9- r1c7 -3- r3c9 -2- r3c1 -5- r3c2 -9 => r1c23<>9
  26. Row 1 / Column 2 → 7 (Naked Single)
  27. Row 1 / Column 3 → 2 (Naked Single)
  28. Row 3 / Column 1 → 5 (Naked Single)
  29. Row 3 / Column 2 → 9 (Full House)
  30. Row 4 / Column 1 → 1 (Naked Single)
  31. Row 4 / Column 7 → 8 (Naked Single)
  32. Row 6 / Column 1 → 3 (Naked Single)
  33. Row 5 / Column 7 → 1 (Naked Single)
  34. Row 5 / Column 3 → 5 (Naked Single)
  35. Row 7 / Column 1 → 4 (Naked Single)
  36. Row 5 / Column 1 → 2 (Full House)
  37. Row 4 / Column 2 → 6 (Naked Single)
  38. Row 5 / Column 5 → 8 (Naked Single)
  39. Row 7 / Column 3 → 3 (Naked Single)
  40. Row 4 / Column 3 → 7 (Naked Single)
  41. Row 6 / Column 2 → 8 (Naked Single)
  42. Row 6 / Column 3 → 9 (Naked Single)
  43. Row 5 / Column 2 → 4 (Full House)
  44. Row 5 / Column 4 → 3 (Full House)
  45. Row 8 / Column 3 → 6 (Full House)
  46. Row 8 / Column 2 → 5 (Naked Single)
  47. Row 7 / Column 2 → 1 (Full House)
  48. Row 6 / Column 5 → 1 (Naked Single)
  49. Row 6 / Column 4 → 6 (Full House)
  50. Row 7 / Column 7 → 2 (Naked Single)
  51. Row 7 / Column 4 → 5 (Full House)
  52. Row 8 / Column 4 → 8 (Naked Single)
  53. Row 8 / Column 5 → 2 (Full House)
  54. Row 2 / Column 7 → 9 (Naked Single)
  55. Row 2 / Column 4 → 2 (Full House)
  56. Row 4 / Column 4 → 9 (Full House)
  57. Row 4 / Column 5 → 5 (Full House)
  58. Row 8 / Column 8 → 3 (Naked Single)
  59. Row 4 / Column 8 → 2 (Full House)
  60. Row 8 / Column 7 → 4 (Full House)
  61. Row 1 / Column 7 → 3 (Full House)
  62. Row 4 / Column 9 → 3 (Full House)
  63. Row 1 / Column 5 → 9 (Full House)
  64. Row 3 / Column 5 → 3 (Full House)
  65. Row 3 / Column 9 → 2 (Full House)
Show More...