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

This Sudoku Puzzle has 77 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Single, Hidden Pair, undefined, Continuous Nice Loop, Full House techniques.

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

Solution Steps:

  1. Row 6 / Column 3 → 1 (Hidden Single)
  2. Row 5 / Column 1 → 3 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 5 in b1 => r89c3<>5
  4. Locked Candidates Type 1 (Pointing): 6 in b1 => r89c3<>6
  5. Locked Candidates Type 1 (Pointing): 7 in b3 => r3c456<>7
  6. Locked Candidates Type 1 (Pointing): 2 in b4 => r4c5689<>2
  7. Locked Candidates Type 1 (Pointing): 7 in b4 => r4c5689<>7
  8. Locked Candidates Type 1 (Pointing): 8 in b4 => r4c5689<>8
  9. Naked Pair: 4,9 in r4c58 => r4c6<>9, r4c9<>4
  10. Naked Pair: 2,8 in r47c1 => r189c1<>2, r19c1<>8
  11. Row 1 / Column 1 → 4 (Naked Single)
  12. Hidden Pair: 5,6 in r23c3 => r23c3<>3, r23c3<>8, r23c3<>9, r3c3<>2
  13. Locked Candidates Type 1 (Pointing): 9 in b1 => r789c2<>9
  14. 2-String Kite: 4 in r3c4,r4c8 (connected by r4c5,r6c4) => r3c8<>4
  15. Continuous Nice Loop: 3/5/6/7/9 5= r3c4 =4= r6c4 =6= r9c4 -6- r9c1 -5- r9c7 =5= r5c7 -5- r5c4 =5= r3c4 =4 => r36c4<>3, r5c69,r9c9<>5, r9c6<>6, r6c4<>7, r3c4<>9
  16. W-Wing: 6/5 in r4c6,r8c1 connected by 5 in r48c9 => r8c6<>6
  17. Row 8 / Column 1 → 6 (Hidden Single)
  18. Row 9 / Column 1 → 5 (Naked Single)
  19. Row 9 / Column 4 → 6 (Hidden Single)
  20. Row 6 / Column 4 → 4 (Naked Single)
  21. Row 3 / Column 4 → 5 (Naked Single)
  22. Row 4 / Column 5 → 9 (Naked Single)
  23. Row 3 / Column 3 → 6 (Naked Single)
  24. Row 4 / Column 8 → 4 (Naked Single)
  25. Row 5 / Column 4 → 7 (Naked Single)
  26. Row 2 / Column 3 → 5 (Naked Single)
  27. Row 1 / Column 4 → 3 (Naked Single)
  28. Row 7 / Column 4 → 9 (Full House)
  29. Row 8 / Column 9 → 5 (Hidden Single)
  30. Row 4 / Column 9 → 6 (Naked Single)
  31. Row 4 / Column 6 → 5 (Naked Single)
  32. Row 5 / Column 7 → 5 (Hidden Single)
  33. Row 1 / Column 6 → 7 (Hidden Single)
  34. Row 9 / Column 5 → 7 (Hidden Single)
  35. Row 8 / Column 2 → 4 (Hidden Single)
  36. Row 2 / Column 7 → 6 (Hidden Single)
  37. Row 6 / Column 6 → 6 (Hidden Single)
  38. Row 5 / Column 8 → 9 (Hidden Single)
  39. Row 9 / Column 7 → 9 (Hidden Single)
  40. Row 1 / Column 7 → 1 (Hidden Single)
  41. Row 6 / Column 5 → 3 (Hidden Single)
  42. Row 8 / Column 3 → 9 (Hidden Single)
  43. Row 5 / Column 9 → 1 (Hidden Single)
  44. Row 9 / Column 9 → 4 (Hidden Single)
  45. Row 3 / Column 7 → 4 (Hidden Single)
  46. Row 3 / Column 5 → 8 (Naked Single)
  47. Row 3 / Column 6 → 9 (Naked Single)
  48. Row 5 / Column 5 → 2 (Naked Single)
  49. Row 5 / Column 6 → 8 (Full House)
  50. Row 2 / Column 6 → 1 (Naked Single)
  51. Row 2 / Column 5 → 4 (Full House)
  52. Row 8 / Column 5 → 1 (Full House)
  53. Row 7 / Column 2 → 1 (Hidden Single)
  54. Row 2 / Column 2 → 9 (Hidden Single)
  55. Row 9 / Column 8 → 1 (Hidden Single)
  56. Row 7 / Column 3 → 7 (Hidden Single)
  57. Row 4 / Column 2 → 7 (Hidden Single)
  58. Row 3 / Column 2 → 3 (Hidden Single)
  59. Row 7 / Column 9 → 3 (Hidden Single)
  60. Row 2 / Column 9 → 8 (Naked Single)
  61. Row 2 / Column 8 → 3 (Full House)
  62. Row 8 / Column 8 → 2 (Naked Single)
  63. Row 7 / Column 7 → 8 (Full House)
  64. Row 8 / Column 6 → 3 (Full House)
  65. Row 6 / Column 7 → 2 (Full House)
  66. Row 7 / Column 1 → 2 (Full House)
  67. Row 9 / Column 6 → 2 (Full House)
  68. Row 4 / Column 1 → 8 (Full House)
  69. Row 4 / Column 3 → 2 (Full House)
  70. Row 3 / Column 8 → 7 (Naked Single)
  71. Row 3 / Column 9 → 2 (Full House)
  72. Row 6 / Column 9 → 7 (Full House)
  73. Row 6 / Column 8 → 8 (Full House)
  74. Row 9 / Column 2 → 8 (Naked Single)
  75. Row 1 / Column 2 → 2 (Full House)
  76. Row 1 / Column 3 → 8 (Full House)
  77. Row 9 / Column 3 → 3 (Full House)
Show More...