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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, undefined, Hidden Rectangle, Bivalue Universal Grave + 1 techniques.

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

Solution Steps:

  1. Row 5 / Column 7 → 4 (Naked Single)
  2. Row 5 / Column 3 → 6 (Full House)
  3. Row 2 / Column 5 → 7 (Naked Single)
  4. Row 1 / Column 5 → 4 (Naked Single)
  5. Row 8 / Column 5 → 9 (Naked Single)
  6. Row 9 / Column 5 → 5 (Full House)
  7. Row 1 / Column 7 → 5 (Hidden Single)
  8. Row 6 / Column 6 → 5 (Hidden Single)
  9. Row 4 / Column 4 → 7 (Hidden Single)
  10. Row 7 / Column 2 → 5 (Hidden Single)
  11. Row 3 / Column 2 → 3 (Hidden Single)
  12. Row 9 / Column 3 → 7 (Hidden Single)
  13. Row 1 / Column 3 → 1 (Naked Single)
  14. Row 3 / Column 3 → 9 (Naked Single)
  15. Row 1 / Column 1 → 7 (Naked Single)
  16. Row 3 / Column 1 → 6 (Full House)
  17. Row 7 / Column 8 → 6 (Hidden Single)
  18. Row 3 / Column 7 → 7 (Hidden Single)
  19. Row 7 / Column 1 → 9 (Hidden Single)
  20. Row 2 / Column 8 → 1 (Hidden Single)
  21. Row 3 / Column 8 → 4 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 8 in b9 => r7c3<>8
  23. Locked Candidates Type 2 (Claiming): 8 in c8 => r4c9,r6c7<>8
  24. Naked Triple: 2,4,8 in r379c9 => r2c9<>8
  25. 2-String Kite: 1 in r4c6,r8c1 (connected by r4c2,r6c1) => r8c6<>1
  26. XY-Wing: 4/8/1 in r4c36,r6c1 => r4c2,r6c4<>1
  27. Row 6 / Column 4 → 4 (Naked Single)
  28. Row 4 / Column 6 → 1 (Full House)
  29. XY-Wing: 2/9/1 in r6c27,r9c7 => r9c2<>1
  30. Row 9 / Column 7 → 1 (Hidden Single)
  31. Row 7 / Column 4 → 1 (Hidden Single)
  32. X-Wing: 2 r39 c69 => r7c9,r8c6<>2
  33. Hidden Rectangle: 4/6 in r8c26,r9c26 => r9c2<>4
  34. Row 9 / Column 2 → 6 (Naked Single)
  35. Bivalue Universal Grave + 1 => r8c3<>2, r8c3<>8
  36. Row 8 / Column 3 → 4 (Naked Single)
  37. Row 4 / Column 3 → 8 (Naked Single)
  38. Row 7 / Column 3 → 2 (Full House)
  39. Row 8 / Column 2 → 1 (Naked Single)
  40. Row 8 / Column 1 → 8 (Full House)
  41. Row 6 / Column 1 → 1 (Full House)
  42. Row 8 / Column 6 → 6 (Naked Single)
  43. Row 8 / Column 4 → 2 (Full House)
  44. Row 9 / Column 6 → 4 (Full House)
  45. Row 9 / Column 9 → 2 (Full House)
  46. Row 4 / Column 8 → 3 (Naked Single)
  47. Row 7 / Column 7 → 8 (Naked Single)
  48. Row 7 / Column 9 → 4 (Full House)
  49. Row 6 / Column 2 → 9 (Naked Single)
  50. Row 4 / Column 2 → 4 (Full House)
  51. Row 4 / Column 9 → 9 (Full House)
  52. Row 2 / Column 6 → 8 (Naked Single)
  53. Row 3 / Column 6 → 2 (Full House)
  54. Row 3 / Column 9 → 8 (Full House)
  55. Row 2 / Column 9 → 3 (Full House)
  56. Row 1 / Column 4 → 3 (Naked Single)
  57. Row 1 / Column 8 → 2 (Full House)
  58. Row 2 / Column 7 → 9 (Full House)
  59. Row 6 / Column 7 → 2 (Full House)
  60. Row 2 / Column 4 → 6 (Full House)
  61. Row 6 / Column 8 → 8 (Full House)
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