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

This Sudoku Puzzle has 38 steps and it is solved using Naked Triple, Naked Single, Hidden Pair, undefined, Skyscraper, Full House, Hidden Single techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Naked Triple: 1,7,9 in r8c149 => r8c37<>1, r8c37<>7, r8c37<>9
  2. Naked Triple: 3,4,9 in r158c7 => r3c7<>3, r369c7<>9
  3. Row 3 / Column 7 → 7 (Naked Single)
  4. Hidden Pair: 3,4 in r7c8,r8c7 => r7c8<>9
  5. X-Wing: 4 r58 c37 => r47c3<>4
  6. X-Wing: 9 c14 r68 => r6c8,r8c9<>9
  7. Skyscraper: 1 in r4c6,r8c4 (connected by r48c9) => r6c4,r7c6<>1
  8. Row 6 / Column 4 → 9 (Naked Single)
  9. Row 4 / Column 6 → 1 (Full House)
  10. Row 7 / Column 6 → 9 (Full House)
  11. Row 8 / Column 4 → 1 (Full House)
  12. Row 6 / Column 1 → 7 (Naked Single)
  13. Row 8 / Column 1 → 9 (Full House)
  14. Row 8 / Column 9 → 7 (Naked Single)
  15. Row 6 / Column 8 → 6 (Naked Single)
  16. Row 6 / Column 7 → 1 (Full House)
  17. Row 9 / Column 2 → 8 (Naked Single)
  18. Row 4 / Column 9 → 9 (Naked Single)
  19. Row 9 / Column 8 → 9 (Naked Single)
  20. Row 9 / Column 7 → 6 (Naked Single)
  21. Row 4 / Column 3 → 2 (Naked Single)
  22. Row 5 / Column 7 → 4 (Naked Single)
  23. Row 4 / Column 8 → 7 (Full House)
  24. Row 4 / Column 2 → 4 (Full House)
  25. Row 5 / Column 3 → 9 (Full House)
  26. Row 9 / Column 9 → 1 (Naked Single)
  27. Row 7 / Column 9 → 8 (Full House)
  28. Row 9 / Column 3 → 7 (Full House)
  29. Row 3 / Column 8 → 3 (Naked Single)
  30. Row 1 / Column 7 → 9 (Full House)
  31. Row 8 / Column 7 → 3 (Full House)
  32. Row 7 / Column 8 → 4 (Full House)
  33. Row 1 / Column 2 → 3 (Full House)
  34. Row 8 / Column 3 → 4 (Full House)
  35. Row 7 / Column 2 → 3 (Naked Single)
  36. Row 3 / Column 3 → 3 (Naked Single)
  37. Row 7 / Column 3 → 1 (Naked Single)
  38. Row 3 / Column 2 → 2 (Hidden Single)
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