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

This Sudoku Puzzle has 57 steps and it is solved using Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, undefined, Hidden Single, Naked Pair, Skyscraper, Naked Single, Full House, Empty Rectangle 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): 4 in b1 => r8c1<>4
  2. Locked Candidates Type 1 (Pointing): 1 in b2 => r469c4<>1
  3. Locked Candidates Type 1 (Pointing): 8 in b2 => r9c4<>8
  4. Locked Candidates Type 1 (Pointing): 5 in b6 => r13c7<>5
  5. Locked Candidates Type 2 (Claiming): 1 in c8 => r4c7,r6c9<>1
  6. Locked Candidates Type 2 (Claiming): 4 in c8 => r4c7,r6c9<>4
  7. Naked Triple: 2,5,8 in r347c2 => r89c2<>2, r8c2<>5, r9c2<>8
  8. Locked Candidates Type 1 (Pointing): 5 in b7 => r7c6<>5
  9. W-Wing: 8/2 in r6c3,r7c1 connected by 2 in r2c13 => r79c3<>8
  10. Row 9 / Column 6 → 8 (Hidden Single)
  11. Naked Pair: 1,2 in r67c6 => r48c6<>1, r48c6<>2
  12. Skyscraper: 2 in r4c2,r6c6 (connected by r7c26) => r4c4,r6c3<>2
  13. Row 6 / Column 3 → 8 (Naked Single)
  14. Row 4 / Column 2 → 2 (Full House)
  15. Row 6 / Column 9 → 6 (Naked Single)
  16. Row 5 / Column 7 → 5 (Naked Single)
  17. Row 5 / Column 4 → 6 (Full House)
  18. Row 4 / Column 7 → 8 (Naked Single)
  19. Row 3 / Column 7 → 6 (Hidden Single)
  20. Empty Rectangle: 3 in b2 (r9c34) => r2c3<>3
  21. W-Wing: 3/5 in r2c5,r4c6 connected by 5 in r8c56 => r4c5<>3
  22. W-Wing: 3/2 in r8c1,r9c4 connected by 2 in r89c7 => r8c56,r9c3<>3
  23. Row 8 / Column 6 → 5 (Naked Single)
  24. Row 4 / Column 6 → 3 (Naked Single)
  25. Row 8 / Column 5 → 1 (Naked Single)
  26. Row 4 / Column 5 → 5 (Naked Single)
  27. Row 2 / Column 5 → 3 (Full House)
  28. Row 7 / Column 6 → 2 (Naked Single)
  29. Row 6 / Column 6 → 1 (Full House)
  30. Row 9 / Column 4 → 3 (Full House)
  31. Row 4 / Column 4 → 4 (Naked Single)
  32. Row 4 / Column 8 → 1 (Full House)
  33. Row 6 / Column 8 → 4 (Full House)
  34. Row 6 / Column 4 → 2 (Full House)
  35. Row 7 / Column 1 → 8 (Naked Single)
  36. Row 7 / Column 2 → 5 (Naked Single)
  37. Row 7 / Column 3 → 1 (Full House)
  38. Row 3 / Column 2 → 8 (Naked Single)
  39. Row 9 / Column 3 → 2 (Naked Single)
  40. Row 2 / Column 3 → 5 (Naked Single)
  41. Row 1 / Column 3 → 3 (Full House)
  42. Row 8 / Column 1 → 3 (Naked Single)
  43. Row 2 / Column 4 → 8 (Naked Single)
  44. Row 1 / Column 1 → 4 (Naked Single)
  45. Row 2 / Column 1 → 2 (Full House)
  46. Row 2 / Column 9 → 4 (Full House)
  47. Row 1 / Column 7 → 1 (Naked Single)
  48. Row 8 / Column 9 → 7 (Naked Single)
  49. Row 1 / Column 4 → 5 (Naked Single)
  50. Row 1 / Column 9 → 8 (Full House)
  51. Row 3 / Column 9 → 5 (Full House)
  52. Row 9 / Column 9 → 1 (Full House)
  53. Row 3 / Column 4 → 1 (Full House)
  54. Row 9 / Column 7 → 4 (Naked Single)
  55. Row 8 / Column 7 → 2 (Full House)
  56. Row 8 / Column 2 → 4 (Full House)
  57. Row 9 / Column 2 → 7 (Full House)
Show More...