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

This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Locked Candidates Type 2 (Claiming), Naked Triple, Locked Candidates Type 1 (Pointing), Hidden Pair, Swordfish, Naked Single, Naked Pair, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 1 → 1 (Hidden Single)
  2. Row 4 / Column 3 → 2 (Hidden Single)
  3. Locked Candidates Type 2 (Claiming): 7 in c5 => r4c6,r6c4<>7
  4. Naked Triple: 4,6,9 in r128c1 => r67c1<>4, r67c1<>6, r7c1<>9
  5. Locked Candidates Type 1 (Pointing): 6 in b4 => r179c2<>6
  6. Hidden Pair: 5,8 in r3c23 => r3c23<>3, r3c23<>4, r3c2<>9
  7. Swordfish: 3 r258 c346 => r17c4,r3c6<>3
  8. Swordfish: 5 r349 c239 => r5c39,r67c2<>5
  9. Row 5 / Column 9 → 9 (Naked Single)
  10. Swordfish: 8 r349 c236 => r5c36,r67c2<>8
  11. Row 5 / Column 3 → 4 (Naked Single)
  12. Row 5 / Column 6 → 3 (Naked Single)
  13. Row 6 / Column 2 → 6 (Naked Single)
  14. Naked Pair: 5,8 in r34c2 => r9c2<>5, r9c2<>8
  15. Naked Pair: 3,6 in r28c3 => r9c3<>6
  16. Locked Candidates Type 1 (Pointing): 6 in b7 => r8c679<>6
  17. Naked Pair: 1,4 in r38c9 => r29c9<>4, r4c9<>1
  18. Row 4 / Column 9 → 5 (Naked Single)
  19. Row 4 / Column 2 → 8 (Naked Single)
  20. Row 6 / Column 1 → 5 (Full House)
  21. Row 5 / Column 7 → 8 (Naked Single)
  22. Row 5 / Column 4 → 5 (Full House)
  23. Row 3 / Column 2 → 5 (Naked Single)
  24. Row 4 / Column 6 → 6 (Naked Single)
  25. Row 7 / Column 1 → 8 (Naked Single)
  26. Row 6 / Column 7 → 2 (Naked Single)
  27. Row 3 / Column 3 → 8 (Naked Single)
  28. Row 4 / Column 5 → 7 (Naked Single)
  29. Row 4 / Column 8 → 1 (Full House)
  30. Row 6 / Column 8 → 7 (Full House)
  31. Row 7 / Column 4 → 4 (Naked Single)
  32. Row 9 / Column 3 → 5 (Naked Single)
  33. Row 6 / Column 5 → 4 (Naked Single)
  34. Row 6 / Column 4 → 8 (Full House)
  35. Row 1 / Column 4 → 2 (Naked Single)
  36. Row 7 / Column 8 → 9 (Naked Single)
  37. Row 7 / Column 2 → 3 (Naked Single)
  38. Row 8 / Column 7 → 1 (Naked Single)
  39. Row 7 / Column 5 → 6 (Naked Single)
  40. Row 7 / Column 7 → 5 (Full House)
  41. Row 8 / Column 3 → 6 (Naked Single)
  42. Row 2 / Column 3 → 3 (Full House)
  43. Row 8 / Column 9 → 4 (Naked Single)
  44. Row 9 / Column 5 → 9 (Naked Single)
  45. Row 2 / Column 4 → 7 (Naked Single)
  46. Row 8 / Column 4 → 3 (Full House)
  47. Row 3 / Column 9 → 1 (Naked Single)
  48. Row 8 / Column 1 → 9 (Naked Single)
  49. Row 8 / Column 6 → 7 (Full House)
  50. Row 9 / Column 2 → 4 (Full House)
  51. Row 9 / Column 6 → 8 (Full House)
  52. Row 1 / Column 2 → 9 (Full House)
  53. Row 9 / Column 8 → 2 (Naked Single)
  54. Row 9 / Column 9 → 6 (Full House)
  55. Row 2 / Column 9 → 2 (Full House)
  56. Row 3 / Column 5 → 3 (Naked Single)
  57. Row 1 / Column 5 → 1 (Full House)
  58. Row 1 / Column 7 → 6 (Naked Single)
  59. Row 2 / Column 7 → 9 (Full House)
  60. Row 3 / Column 8 → 4 (Naked Single)
  61. Row 1 / Column 8 → 3 (Full House)
  62. Row 1 / Column 1 → 4 (Full House)
  63. Row 3 / Column 6 → 9 (Full House)
  64. Row 2 / Column 6 → 4 (Full House)
  65. Row 2 / Column 1 → 6 (Full House)
Show More...