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

This Sudoku Puzzle has 75 steps and it is solved using Locked Candidates Type 1 (Pointing), Swordfish, Hidden Pair, Continuous Nice Loop, undefined, Naked Single, Hidden Triple, Discontinuous Nice Loop, Full House, Hidden Single techniques.

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

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 1 in b5 => r5c127<>1
  2. Locked Candidates Type 1 (Pointing): 3 in b5 => r1379c5<>3
  3. Locked Candidates Type 1 (Pointing): 4 in b9 => r8c126<>4
  4. Locked Candidates Type 1 (Pointing): 5 in b9 => r8c1246<>5
  5. Swordfish: 6 r258 c248 => r3c48,r6c28,r7c24<>6
  6. Swordfish: 7 r258 c147 => r3c47,r4c17,r9c14<>7
  7. Hidden Pair: 6,7 in r2c4,r3c5 => r2c4<>1, r2c4<>2, r2c4<>3, r2c4,r3c5<>8, r3c5<>5, r3c5<>9
  8. Hidden Pair: 6,7 in r3c59 => r3c9<>1, r3c9<>9
  9. Hidden Pair: 6,7 in r28c4 => r8c4<>2
  10. Continuous Nice Loop: 1/5/8/9 9= r4c9 =7= r4c3 -7- r9c3 =7= r9c5 =9= r1c5 -9- r1c9 =9= r4c9 =7 => r4c9<>1, r9c5<>5, r9c5<>8, r1c368<>9
  11. XY-Wing: 6/7/9 in r8c24,r9c5 => r8c6,r9c123<>9
  12. Row 8 / Column 6 → 2 (Naked Single)
  13. Locked Candidates Type 1 (Pointing): 2 in b2 => r1c78<>2
  14. Hidden Triple: 2,6,7 in r2c78,r3c9 => r2c7<>1, r2c78<>3, r2c7<>8, r2c8<>9
  15. W-Wing: 9/7 in r4c9,r8c1 connected by 7 in r5c17 => r4c1<>9
  16. Discontinuous Nice Loop: 1/2/4/5 r7c3 =6= r7c5 -6- r3c5 -7- r3c9 =7= r4c9 =9= r5c8 =6= r5c2 -6- r8c2 =6= r7c3 => r7c3<>1, r7c3<>2, r7c3<>4, r7c3<>5
  17. Row 7 / Column 3 → 6 (Naked Single)
  18. Row 7 / Column 5 → 5 (Naked Single)
  19. Row 8 / Column 2 → 9 (Naked Single)
  20. Row 7 / Column 4 → 3 (Naked Single)
  21. Row 8 / Column 1 → 7 (Naked Single)
  22. Row 7 / Column 6 → 4 (Naked Single)
  23. Row 9 / Column 4 → 8 (Naked Single)
  24. Row 8 / Column 4 → 6 (Naked Single)
  25. Row 7 / Column 2 → 1 (Naked Single)
  26. Row 7 / Column 1 → 2 (Full House)
  27. Row 9 / Column 6 → 9 (Naked Single)
  28. Row 9 / Column 5 → 7 (Full House)
  29. Row 2 / Column 4 → 7 (Naked Single)
  30. Row 4 / Column 2 → 5 (Naked Single)
  31. Row 3 / Column 5 → 6 (Naked Single)
  32. Row 2 / Column 7 → 2 (Naked Single)
  33. Row 4 / Column 1 → 1 (Naked Single)
  34. Row 3 / Column 9 → 7 (Naked Single)
  35. Row 2 / Column 8 → 6 (Naked Single)
  36. Row 4 / Column 7 → 3 (Naked Single)
  37. Row 4 / Column 9 → 9 (Naked Single)
  38. Row 4 / Column 5 → 2 (Naked Single)
  39. Row 4 / Column 3 → 7 (Full House)
  40. Row 1 / Column 9 → 1 (Naked Single)
  41. Row 6 / Column 9 → 6 (Full House)
  42. Row 5 / Column 5 → 8 (Naked Single)
  43. Row 1 / Column 5 → 9 (Naked Single)
  44. Row 6 / Column 5 → 3 (Full House)
  45. Row 5 / Column 1 → 9 (Naked Single)
  46. Row 5 / Column 2 → 6 (Naked Single)
  47. Row 5 / Column 7 → 7 (Hidden Single)
  48. Row 3 / Column 8 → 9 (Hidden Single)
  49. Row 1 / Column 4 → 2 (Hidden Single)
  50. Row 6 / Column 3 → 2 (Hidden Single)
  51. Row 6 / Column 8 → 5 (Naked Single)
  52. Row 5 / Column 8 → 2 (Naked Single)
  53. Row 6 / Column 7 → 1 (Full House)
  54. Row 8 / Column 8 → 4 (Naked Single)
  55. Row 1 / Column 8 → 3 (Full House)
  56. Row 8 / Column 7 → 5 (Full House)
  57. Row 2 / Column 3 → 9 (Hidden Single)
  58. Row 2 / Column 6 → 1 (Hidden Single)
  59. Row 3 / Column 4 → 5 (Naked Single)
  60. Row 5 / Column 4 → 1 (Full House)
  61. Row 5 / Column 6 → 5 (Full House)
  62. Row 1 / Column 6 → 8 (Naked Single)
  63. Row 3 / Column 6 → 3 (Full House)
  64. Row 1 / Column 7 → 4 (Naked Single)
  65. Row 1 / Column 3 → 5 (Full House)
  66. Row 3 / Column 7 → 8 (Full House)
  67. Row 9 / Column 3 → 4 (Naked Single)
  68. Row 3 / Column 3 → 1 (Full House)
  69. Row 3 / Column 1 → 4 (Full House)
  70. Row 9 / Column 2 → 3 (Naked Single)
  71. Row 9 / Column 1 → 5 (Full House)
  72. Row 6 / Column 1 → 8 (Naked Single)
  73. Row 2 / Column 1 → 3 (Full House)
  74. Row 2 / Column 2 → 8 (Full House)
  75. Row 6 / Column 2 → 4 (Full House)
Show More...