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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Discontinuous Nice Loop, Grouped Discontinuous Nice Loop, Naked Single, Full House techniques.

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

Solution Steps:

  1. Row 9 / Column 3 → 4 (Hidden Single)
  2. Row 8 / Column 8 → 3 (Hidden Single)
  3. Row 4 / Column 6 → 3 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 5 in b3 => r1c13<>5
  5. Locked Candidates Type 1 (Pointing): 6 in b9 => r456c9<>6
  6. Locked Candidates Type 2 (Claiming): 9 in r2 => r1c456,r3c5<>9
  7. Row 5 / Column 5 → 9 (Hidden Single)
  8. Row 4 / Column 9 → 9 (Hidden Single)
  9. Row 5 / Column 4 → 4 (Hidden Single)
  10. Locked Candidates Type 2 (Claiming): 6 in r5 => r4c123,r6c2<>6
  11. Finned X-Wing: 7 c68 r26 fr4c8 => r6c9<>7
  12. Discontinuous Nice Loop: 2 r3c9 -2- r1c8 -4- r1c5 =4= r3c5 =1= r3c9 => r3c9<>2
  13. Grouped Discontinuous Nice Loop: 1/6 r1c5 =4= r1c8 -4- r2c8 -7- r2c46 =7= r3c5 =4= r1c5 => r1c5<>1, r1c5<>6
  14. Row 1 / Column 5 → 4 (Naked Single)
  15. Row 1 / Column 8 → 2 (Naked Single)
  16. Row 2 / Column 8 → 4 (Hidden Single)
  17. Row 3 / Column 2 → 4 (Hidden Single)
  18. Row 6 / Column 9 → 2 (Hidden Single)
  19. Row 6 / Column 2 → 8 (Hidden Single)
  20. Row 2 / Column 2 → 5 (Naked Single)
  21. Row 2 / Column 3 → 8 (Naked Single)
  22. Row 6 / Column 4 → 5 (Hidden Single)
  23. Row 6 / Column 5 → 1 (Hidden Single)
  24. Row 3 / Column 9 → 1 (Hidden Single)
  25. Row 1 / Column 9 → 5 (Naked Single)
  26. Row 1 / Column 7 → 9 (Naked Single)
  27. Row 3 / Column 7 → 7 (Full House)
  28. Row 3 / Column 5 → 6 (Naked Single)
  29. Row 1 / Column 6 → 8 (Naked Single)
  30. Row 3 / Column 3 → 2 (Naked Single)
  31. Row 3 / Column 1 → 9 (Full House)
  32. Row 1 / Column 4 → 1 (Naked Single)
  33. Row 8 / Column 3 → 6 (Naked Single)
  34. Row 1 / Column 3 → 3 (Naked Single)
  35. Row 1 / Column 1 → 6 (Full House)
  36. Row 8 / Column 2 → 2 (Naked Single)
  37. Row 8 / Column 6 → 9 (Naked Single)
  38. Row 8 / Column 4 → 8 (Full House)
  39. Row 4 / Column 2 → 1 (Naked Single)
  40. Row 2 / Column 6 → 7 (Naked Single)
  41. Row 2 / Column 4 → 9 (Full House)
  42. Row 6 / Column 6 → 6 (Full House)
  43. Row 4 / Column 4 → 7 (Full House)
  44. Row 6 / Column 8 → 7 (Full House)
  45. Row 4 / Column 8 → 6 (Full House)
  46. Row 7 / Column 2 → 3 (Naked Single)
  47. Row 5 / Column 2 → 6 (Full House)
  48. Row 4 / Column 3 → 5 (Naked Single)
  49. Row 4 / Column 1 → 2 (Full House)
  50. Row 5 / Column 9 → 8 (Naked Single)
  51. Row 5 / Column 7 → 5 (Full House)
  52. Row 7 / Column 5 → 7 (Naked Single)
  53. Row 9 / Column 5 → 3 (Full House)
  54. Row 9 / Column 1 → 8 (Naked Single)
  55. Row 5 / Column 1 → 3 (Naked Single)
  56. Row 5 / Column 3 → 7 (Full House)
  57. Row 7 / Column 3 → 1 (Full House)
  58. Row 7 / Column 1 → 5 (Full House)
  59. Row 7 / Column 9 → 6 (Naked Single)
  60. Row 9 / Column 9 → 7 (Full House)
  61. Row 9 / Column 7 → 2 (Naked Single)
  62. Row 7 / Column 7 → 8 (Full House)
  63. Row 7 / Column 4 → 2 (Full House)
  64. Row 9 / Column 4 → 6 (Full House)
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