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

This Sudoku Puzzle has 48 steps and it is solved using Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Hidden Single, Naked Single, 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. Locked Candidates Type 1 (Pointing): 3 in b4 => r9c2<>3
  2. Locked Candidates Type 2 (Claiming): 3 in r7 => r8c46,r9c5<>3
  3. Locked Candidates Type 2 (Claiming): 9 in r7 => r8c46,r9c5<>9
  4. Naked Pair: 3,9 in r5c7,r6c8 => r46c7<>3, r46c7<>9
  5. Locked Candidates Type 2 (Claiming): 3 in r4 => r5c4,r6c5<>3
  6. X-Wing: 4 r29 c25 => r146c5<>4
  7. Row 6 / Column 7 → 4 (Hidden Single)
  8. Row 4 / Column 7 → 8 (Naked Single)
  9. Row 4 / Column 3 → 9 (Naked Single)
  10. Row 6 / Column 3 → 8 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 9 in b1 => r2c5<>9
  12. Locked Candidates Type 1 (Pointing): 2 in b4 => r29c2<>2
  13. Naked Pair: 2,4 in r8c36 => r8c14<>2, r8c4<>4
  14. Row 8 / Column 4 → 6 (Naked Single)
  15. Row 3 / Column 3 → 6 (Hidden Single)
  16. Row 1 / Column 5 → 6 (Hidden Single)
  17. Row 9 / Column 9 → 6 (Hidden Single)
  18. Naked Pair: 2,4 in r29c5 => r6c5<>2
  19. Row 6 / Column 5 → 9 (Naked Single)
  20. Row 5 / Column 4 → 2 (Naked Single)
  21. Row 6 / Column 8 → 3 (Naked Single)
  22. Row 5 / Column 7 → 9 (Full House)
  23. Row 5 / Column 2 → 3 (Full House)
  24. Row 6 / Column 2 → 2 (Full House)
  25. Row 9 / Column 8 → 9 (Full House)
  26. Row 8 / Column 9 → 3 (Full House)
  27. Row 1 / Column 9 → 9 (Full House)
  28. Row 9 / Column 2 → 4 (Naked Single)
  29. Row 2 / Column 2 → 9 (Full House)
  30. Row 8 / Column 1 → 9 (Naked Single)
  31. Row 8 / Column 3 → 2 (Naked Single)
  32. Row 1 / Column 3 → 4 (Full House)
  33. Row 2 / Column 1 → 2 (Full House)
  34. Row 8 / Column 6 → 4 (Full House)
  35. Row 9 / Column 1 → 3 (Full House)
  36. Row 9 / Column 5 → 2 (Full House)
  37. Row 2 / Column 5 → 4 (Full House)
  38. Row 1 / Column 4 → 3 (Naked Single)
  39. Row 1 / Column 7 → 2 (Full House)
  40. Row 3 / Column 7 → 3 (Full House)
  41. Row 4 / Column 6 → 3 (Naked Single)
  42. Row 3 / Column 4 → 9 (Naked Single)
  43. Row 3 / Column 6 → 2 (Full House)
  44. Row 7 / Column 6 → 9 (Full House)
  45. Row 4 / Column 5 → 1 (Naked Single)
  46. Row 4 / Column 4 → 4 (Full House)
  47. Row 7 / Column 4 → 1 (Full House)
  48. Row 7 / Column 5 → 3 (Full House)
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