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

This Sudoku Puzzle has 51 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, 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. Row 5 / Column 4 → 3 (Hidden Single)
  2. Row 8 / Column 5 → 6 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 2 in b4 => r4c46<>2
  4. Locked Candidates Type 1 (Pointing): 1 in b7 => r1c2<>1
  5. Locked Candidates Type 1 (Pointing): 7 in b7 => r134c2<>7
  6. Naked Pair: 2,7 in r1c59 => r1c2347<>2, r1c347<>7
  7. Row 1 / Column 2 → 5 (Naked Single)
  8. Row 1 / Column 7 → 1 (Naked Single)
  9. Row 3 / Column 4 → 5 (Hidden Single)
  10. Row 4 / Column 1 → 5 (Hidden Single)
  11. Row 2 / Column 3 → 1 (Hidden Single)
  12. Row 4 / Column 8 → 1 (Hidden Single)
  13. Row 5 / Column 6 → 1 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 2 in b1 => r3c69<>2
  15. Row 1 / Column 9 → 2 (Hidden Single)
  16. Row 1 / Column 5 → 7 (Naked Single)
  17. Row 9 / Column 5 → 2 (Full House)
  18. Row 9 / Column 7 → 7 (Full House)
  19. Row 5 / Column 7 → 4 (Naked Single)
  20. Row 8 / Column 9 → 8 (Naked Single)
  21. Row 6 / Column 7 → 6 (Naked Single)
  22. Row 7 / Column 7 → 2 (Full House)
  23. Row 7 / Column 8 → 6 (Naked Single)
  24. Row 7 / Column 9 → 4 (Full House)
  25. Row 6 / Column 9 → 7 (Naked Single)
  26. Row 3 / Column 9 → 6 (Full House)
  27. Row 2 / Column 8 → 7 (Full House)
  28. Row 6 / Column 8 → 8 (Full House)
  29. Row 6 / Column 4 → 2 (Naked Single)
  30. Row 6 / Column 6 → 4 (Full House)
  31. Row 3 / Column 6 → 9 (Naked Single)
  32. Row 2 / Column 1 → 8 (Naked Single)
  33. Row 1 / Column 4 → 8 (Naked Single)
  34. Row 1 / Column 3 → 9 (Full House)
  35. Row 8 / Column 6 → 7 (Naked Single)
  36. Row 2 / Column 4 → 6 (Naked Single)
  37. Row 2 / Column 6 → 2 (Full House)
  38. Row 5 / Column 1 → 7 (Naked Single)
  39. Row 3 / Column 1 → 4 (Full House)
  40. Row 5 / Column 3 → 8 (Full House)
  41. Row 4 / Column 6 → 6 (Naked Single)
  42. Row 7 / Column 6 → 8 (Full House)
  43. Row 4 / Column 4 → 7 (Full House)
  44. Row 7 / Column 4 → 1 (Naked Single)
  45. Row 7 / Column 2 → 7 (Full House)
  46. Row 8 / Column 2 → 1 (Full House)
  47. Row 8 / Column 4 → 9 (Full House)
  48. Row 4 / Column 3 → 2 (Naked Single)
  49. Row 3 / Column 3 → 7 (Full House)
  50. Row 3 / Column 2 → 2 (Full House)
  51. Row 4 / Column 2 → 4 (Full House)
Show More...