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

This Sudoku Puzzle has 46 steps and it is solved using Naked Single, Locked Candidates Type 1 (Pointing), Naked Pair, Turbot Fish, Empty Rectangle, Full House, Skyscraper, Hidden Single techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 8 → 8 (Naked Single)
  2. Locked Candidates Type 1 (Pointing): 1 in b3 => r6c7<>1
  3. Locked Candidates Type 1 (Pointing): 5 in b3 => r6c7<>5
  4. Naked Pair: 1,5 in r3c27 => r3c6<>5
  5. Turbot Fish: 5 r2c6 =5= r1c4 -5- r4c4 =5= r4c2 => r2c2<>5
  6. Empty Rectangle: 5 in b1 (r4c24) => r1c4<>5
  7. Row 1 / Column 4 → 3 (Naked Single)
  8. Row 2 / Column 5 → 4 (Naked Single)
  9. Row 2 / Column 6 → 5 (Naked Single)
  10. Row 2 / Column 7 → 1 (Naked Single)
  11. Row 2 / Column 2 → 3 (Full House)
  12. Row 3 / Column 7 → 5 (Full House)
  13. Row 3 / Column 2 → 1 (Naked Single)
  14. Skyscraper: 4 in r4c4,r9c6 (connected by r49c2) => r56c6,r8c4<>4
  15. Row 8 / Column 4 → 8 (Naked Single)
  16. Row 9 / Column 6 → 4 (Hidden Single)
  17. Row 9 / Column 2 → 7 (Naked Single)
  18. Row 1 / Column 2 → 5 (Naked Single)
  19. Row 1 / Column 1 → 7 (Full House)
  20. Row 4 / Column 2 → 4 (Full House)
  21. Row 4 / Column 4 → 5 (Full House)
  22. Row 8 / Column 3 → 3 (Naked Single)
  23. Row 9 / Column 5 → 3 (Naked Single)
  24. Row 9 / Column 3 → 8 (Full House)
  25. Row 5 / Column 3 → 7 (Full House)
  26. Row 7 / Column 1 → 4 (Full House)
  27. Row 7 / Column 5 → 7 (Full House)
  28. Row 8 / Column 7 → 4 (Naked Single)
  29. Row 6 / Column 7 → 3 (Full House)
  30. Row 5 / Column 6 → 6 (Naked Single)
  31. Row 7 / Column 9 → 1 (Naked Single)
  32. Row 7 / Column 8 → 3 (Full House)
  33. Row 8 / Column 9 → 6 (Naked Single)
  34. Row 8 / Column 8 → 7 (Full House)
  35. Row 6 / Column 1 → 5 (Naked Single)
  36. Row 5 / Column 1 → 3 (Full House)
  37. Row 3 / Column 6 → 8 (Naked Single)
  38. Row 3 / Column 5 → 6 (Full House)
  39. Row 6 / Column 5 → 8 (Full House)
  40. Row 6 / Column 6 → 7 (Full House)
  41. Row 5 / Column 8 → 1 (Naked Single)
  42. Row 6 / Column 8 → 6 (Full House)
  43. Row 6 / Column 9 → 4 (Naked Single)
  44. Row 5 / Column 9 → 5 (Full House)
  45. Row 5 / Column 4 → 4 (Full House)
  46. Row 6 / Column 4 → 1 (Full House)
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