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

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.

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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