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

This Sudoku Puzzle has 45 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Skyscraper, Uniqueness Test 3, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 7 → 8 (Naked Single)
  2. Row 8 / Column 8 → 3 (Naked Single)
  3. Row 3 / Column 7 → 4 (Naked Single)
  4. Row 4 / Column 1 → 2 (Naked Single)
  5. Row 6 / Column 8 → 6 (Naked Single)
  6. Row 7 / Column 7 → 9 (Naked Single)
  7. Row 5 / Column 7 → 5 (Full House)
  8. Row 4 / Column 9 → 7 (Naked Single)
  9. Row 5 / Column 9 → 4 (Full House)
  10. Row 6 / Column 5 → 4 (Naked Single)
  11. Row 4 / Column 5 → 6 (Naked Single)
  12. Row 4 / Column 2 → 1 (Full House)
  13. Row 9 / Column 5 → 3 (Naked Single)
  14. Row 7 / Column 5 → 7 (Naked Single)
  15. Row 6 / Column 1 → 5 (Hidden Single)
  16. Row 5 / Column 6 → 7 (Hidden Single)
  17. Row 5 / Column 4 → 9 (Hidden Single)
  18. Row 8 / Column 6 → 9 (Hidden Single)
  19. Locked Candidates Type 1 (Pointing): 8 in b9 => r123c9<>8
  20. Row 3 / Column 9 → 6 (Naked Single)
  21. Locked Candidates Type 2 (Claiming): 8 in c1 => r1c23,r2c23,r3c2<>8
  22. Naked Pair: 4,8 in r2c16 => r2c2<>4, r2c8<>8
  23. Row 2 / Column 8 → 2 (Naked Single)
  24. Row 1 / Column 8 → 8 (Full House)
  25. Naked Triple: 3,5,6 in r12c3,r2c2 => r1c2<>3, r1c2<>5
  26. Skyscraper: 4 in r1c4,r9c6 (connected by r19c2) => r2c6,r8c4<>4
  27. Row 2 / Column 6 → 8 (Naked Single)
  28. Row 8 / Column 4 → 1 (Naked Single)
  29. Row 9 / Column 6 → 4 (Full House)
  30. Row 6 / Column 6 → 1 (Full House)
  31. Row 6 / Column 4 → 8 (Full House)
  32. Row 2 / Column 1 → 4 (Naked Single)
  33. Row 3 / Column 4 → 2 (Naked Single)
  34. Row 1 / Column 4 → 4 (Full House)
  35. Row 8 / Column 9 → 5 (Naked Single)
  36. Row 1 / Column 2 → 2 (Naked Single)
  37. Row 8 / Column 1 → 7 (Naked Single)
  38. Row 3 / Column 1 → 8 (Full House)
  39. Row 3 / Column 2 → 7 (Full House)
  40. Row 8 / Column 2 → 4 (Full House)
  41. Uniqueness Test 3: 1/8 in r7c39,r9c39 => r2c3<>3, r2c3<>5
  42. Row 2 / Column 3 → 6 (Naked Single)
  43. Row 5 / Column 3 → 8 (Naked Single)
  44. Row 5 / Column 2 → 6 (Full House)
  45. Give Up: Don't know how to proceed!
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