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

This Sudoku Puzzle has 48 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Skyscraper, Remote Pair, Full House 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 7 / Column 4 → 4 (Hidden Single)
  2. Row 8 / Column 5 → 3 (Naked Single)
  3. Row 2 / Column 5 → 4 (Hidden Single)
  4. Row 8 / Column 4 → 5 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 2 in b6 => r6c4<>2
  6. Row 5 / Column 4 → 2 (Hidden Single)
  7. Row 3 / Column 4 → 6 (Hidden Single)
  8. Locked Candidates Type 2 (Claiming): 1 in r2 => r3c9<>1
  9. Naked Pair: 1,2 in r26c8 => r8c8<>1, r89c8<>2
  10. Row 8 / Column 6 → 2 (Hidden Single)
  11. Row 8 / Column 1 → 8 (Hidden Single)
  12. Locked Candidates Type 1 (Pointing): 1 in b9 => r7c1<>1
  13. X-Wing: 3 r34 c69 => r2c9<>3
  14. Skyscraper: 7 in r1c5,r7c6 (connected by r17c1) => r3c6,r9c5<>7
  15. Row 9 / Column 5 → 6 (Naked Single)
  16. Row 5 / Column 6 → 6 (Hidden Single)
  17. Remote Pair: 1/7 r1c1 -7- r1c5 -1- r5c5 -7- r5c2 => r6c1<>1, r6c1<>7
  18. Row 6 / Column 1 → 5 (Naked Single)
  19. Row 7 / Column 1 → 7 (Naked Single)
  20. Row 1 / Column 1 → 1 (Full House)
  21. Row 1 / Column 5 → 7 (Full House)
  22. Row 3 / Column 3 → 7 (Full House)
  23. Row 5 / Column 5 → 1 (Full House)
  24. Row 5 / Column 2 → 7 (Full House)
  25. Row 6 / Column 3 → 1 (Full House)
  26. Row 7 / Column 6 → 8 (Naked Single)
  27. Row 9 / Column 6 → 7 (Full House)
  28. Row 9 / Column 2 → 4 (Naked Single)
  29. Row 8 / Column 2 → 1 (Full House)
  30. Row 2 / Column 4 → 3 (Naked Single)
  31. Row 3 / Column 6 → 1 (Full House)
  32. Row 3 / Column 9 → 3 (Full House)
  33. Row 4 / Column 6 → 3 (Full House)
  34. Row 6 / Column 4 → 7 (Full House)
  35. Row 4 / Column 9 → 1 (Full House)
  36. Row 6 / Column 8 → 2 (Naked Single)
  37. Row 6 / Column 7 → 3 (Full House)
  38. Row 8 / Column 3 → 9 (Naked Single)
  39. Row 8 / Column 8 → 4 (Full House)
  40. Row 9 / Column 3 → 5 (Full House)
  41. Row 7 / Column 7 → 1 (Naked Single)
  42. Row 7 / Column 9 → 5 (Full House)
  43. Row 9 / Column 8 → 9 (Naked Single)
  44. Row 2 / Column 8 → 1 (Full House)
  45. Row 9 / Column 9 → 2 (Naked Single)
  46. Row 2 / Column 9 → 7 (Full House)
  47. Row 2 / Column 7 → 2 (Full House)
  48. Row 9 / Column 7 → 8 (Full House)
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