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

This Sudoku Puzzle has 70 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, Turbot Fish, undefined, Locked Pair, Naked Single, Skyscraper, 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 2 / Column 8 → 5 (Hidden Single)
  2. Row 5 / Column 9 → 5 (Hidden Single)
  3. Row 8 / Column 8 → 1 (Hidden Single)
  4. Row 9 / Column 4 → 3 (Hidden Single)
  5. Row 2 / Column 7 → 1 (Hidden Single)
  6. Row 9 / Column 9 → 6 (Hidden Single)
  7. Row 9 / Column 8 → 8 (Hidden Single)
  8. Row 2 / Column 6 → 7 (Hidden Single)
  9. Row 8 / Column 5 → 7 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 2 in b8 => r13456c5<>2
  11. Locked Candidates Type 1 (Pointing): 2 in b2 => r46c4<>2
  12. Locked Candidates Type 2 (Claiming): 3 in c2 => r456c3,r56c1<>3
  13. Naked Triple: 4,7,9 in r8c2,r9c13 => r7c1<>4, r7c13<>7, r7c3<>9
  14. Locked Candidates Type 1 (Pointing): 7 in b7 => r9c7<>7
  15. Hidden Pair: 6,8 in r3c35 => r3c3<>3, r3c5<>9
  16. Locked Candidates Type 1 (Pointing): 9 in b2 => r1c79<>9
  17. Hidden Pair: 1,5 in r4c35 => r4c35<>6, r4c3<>7, r4c35<>9
  18. Locked Candidates Type 1 (Pointing): 7 in b4 => r6c8<>7
  19. Turbot Fish: 4 r6c4 =4= r8c4 -4- r8c2 =4= r9c1 => r6c1<>4
  20. W-Wing: 9/8 in r1c5,r8c6 connected by 8 in r5c56 => r79c5<>9
  21. Locked Pair: 2,4 in r79c5 => r56c5,r8c4<>4
  22. Row 6 / Column 4 → 4 (Hidden Single)
  23. Row 8 / Column 2 → 4 (Hidden Single)
  24. Row 9 / Column 1 → 7 (Naked Single)
  25. Row 9 / Column 3 → 9 (Naked Single)
  26. Row 5 / Column 1 → 4 (Hidden Single)
  27. Row 6 / Column 3 → 7 (Hidden Single)
  28. Row 1 / Column 1 → 1 (Hidden Single)
  29. Skyscraper: 6 in r2c4,r6c5 (connected by r26c2) => r3c5,r4c4<>6
  30. Row 3 / Column 5 → 8 (Naked Single)
  31. Row 4 / Column 4 → 9 (Naked Single)
  32. Row 1 / Column 5 → 9 (Naked Single)
  33. Row 3 / Column 3 → 6 (Naked Single)
  34. Row 1 / Column 4 → 2 (Naked Single)
  35. Row 2 / Column 4 → 6 (Full House)
  36. Row 8 / Column 4 → 8 (Full House)
  37. Row 2 / Column 2 → 2 (Full House)
  38. Row 8 / Column 6 → 9 (Full House)
  39. Row 5 / Column 3 → 1 (Naked Single)
  40. Row 1 / Column 9 → 7 (Naked Single)
  41. Row 3 / Column 1 → 3 (Naked Single)
  42. Row 1 / Column 3 → 8 (Full House)
  43. Row 1 / Column 7 → 3 (Full House)
  44. Row 4 / Column 3 → 5 (Naked Single)
  45. Row 7 / Column 3 → 3 (Full House)
  46. Row 7 / Column 1 → 5 (Full House)
  47. Row 6 / Column 1 → 2 (Full House)
  48. Row 5 / Column 5 → 6 (Naked Single)
  49. Row 4 / Column 5 → 1 (Naked Single)
  50. Row 6 / Column 6 → 3 (Naked Single)
  51. Row 6 / Column 5 → 5 (Naked Single)
  52. Row 4 / Column 6 → 2 (Naked Single)
  53. Row 5 / Column 6 → 8 (Full House)
  54. Row 6 / Column 8 → 9 (Naked Single)
  55. Row 6 / Column 2 → 6 (Full House)
  56. Row 5 / Column 7 → 2 (Naked Single)
  57. Row 4 / Column 2 → 3 (Naked Single)
  58. Row 5 / Column 2 → 9 (Full House)
  59. Row 5 / Column 8 → 3 (Full House)
  60. Row 9 / Column 7 → 4 (Naked Single)
  61. Row 9 / Column 5 → 2 (Full House)
  62. Row 7 / Column 5 → 4 (Full House)
  63. Row 4 / Column 8 → 7 (Naked Single)
  64. Row 4 / Column 7 → 6 (Full House)
  65. Row 3 / Column 7 → 9 (Naked Single)
  66. Row 7 / Column 7 → 7 (Full House)
  67. Row 7 / Column 8 → 2 (Naked Single)
  68. Row 3 / Column 8 → 4 (Full House)
  69. Row 3 / Column 9 → 2 (Full House)
  70. Row 7 / Column 9 → 9 (Full House)
Show More...