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

This Sudoku Puzzle has 45 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, Hidden Single, Naked Single, Full House techniques.

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

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 1 in b1 => r46c2<>1
  2. Naked Pair: 6,7 in r27c1 => r34c1<>7, r45c1<>6
  3. Naked Triple: 4,8,9 in r1c13,r3c1 => r3c2<>4
  4. Locked Candidates Type 1 (Pointing): 4 in b1 => r45c1<>4
  5. Row 5 / Column 6 → 4 (Hidden Single)
  6. Row 1 / Column 6 → 8 (Naked Single)
  7. Row 1 / Column 3 → 9 (Naked Single)
  8. Row 1 / Column 1 → 4 (Full House)
  9. Row 9 / Column 6 → 3 (Naked Single)
  10. Row 3 / Column 1 → 8 (Naked Single)
  11. Row 9 / Column 4 → 2 (Naked Single)
  12. Row 9 / Column 9 → 8 (Full House)
  13. Row 5 / Column 1 → 3 (Naked Single)
  14. Row 8 / Column 8 → 6 (Naked Single)
  15. Row 4 / Column 1 → 9 (Naked Single)
  16. Row 5 / Column 4 → 1 (Naked Single)
  17. Row 6 / Column 8 → 4 (Naked Single)
  18. Row 4 / Column 8 → 8 (Full House)
  19. Row 8 / Column 3 → 7 (Naked Single)
  20. Row 7 / Column 1 → 6 (Full House)
  21. Row 2 / Column 1 → 7 (Full House)
  22. Row 8 / Column 9 → 5 (Naked Single)
  23. Row 7 / Column 9 → 2 (Full House)
  24. Row 5 / Column 9 → 6 (Naked Single)
  25. Row 4 / Column 9 → 1 (Full House)
  26. Row 5 / Column 3 → 8 (Full House)
  27. Row 2 / Column 5 → 1 (Naked Single)
  28. Row 2 / Column 2 → 6 (Full House)
  29. Row 3 / Column 2 → 1 (Full House)
  30. Row 8 / Column 6 → 1 (Naked Single)
  31. Row 8 / Column 5 → 8 (Full House)
  32. Row 4 / Column 3 → 6 (Naked Single)
  33. Row 6 / Column 3 → 1 (Full House)
  34. Row 3 / Column 6 → 7 (Naked Single)
  35. Row 6 / Column 2 → 7 (Naked Single)
  36. Row 4 / Column 2 → 4 (Full House)
  37. Row 3 / Column 4 → 3 (Naked Single)
  38. Row 3 / Column 5 → 4 (Full House)
  39. Row 6 / Column 6 → 6 (Naked Single)
  40. Row 7 / Column 6 → 5 (Full House)
  41. Row 6 / Column 5 → 9 (Full House)
  42. Row 4 / Column 4 → 7 (Naked Single)
  43. Row 4 / Column 5 → 3 (Full House)
  44. Row 7 / Column 5 → 7 (Full House)
  45. Row 7 / Column 4 → 9 (Full House)
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