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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Hidden Pair, undefined, Swordfish, Naked Single, Locked Candidates Type 2 (Claiming), 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 8 / Column 7 → 1 (Hidden Single)
  2. Locked Candidates Type 1 (Pointing): 2 in b9 => r45c9<>2
  3. Hidden Pair: 3,7 in r7c45 => r7c5<>6, r7c5<>9
  4. X-Wing: 1 c14 r26 => r2c3,r6c25<>1
  5. Swordfish: 5 r349 c268 => r1c28,r58c6<>5
  6. Row 1 / Column 2 → 2 (Naked Single)
  7. Locked Candidates Type 2 (Claiming): 2 in r4 => r5c46,r6c45<>2
  8. Row 8 / Column 4 → 2 (Hidden Single)
  9. Row 9 / Column 9 → 2 (Hidden Single)
  10. Row 8 / Column 1 → 5 (Hidden Single)
  11. Row 5 / Column 4 → 5 (Hidden Single)
  12. Row 9 / Column 6 → 5 (Hidden Single)
  13. Row 2 / Column 9 → 8 (Hidden Single)
  14. Row 1 / Column 7 → 5 (Hidden Single)
  15. Row 3 / Column 2 → 5 (Hidden Single)
  16. Row 4 / Column 8 → 5 (Hidden Single)
  17. Row 1 / Column 4 → 8 (Hidden Single)
  18. Row 5 / Column 6 → 8 (Hidden Single)
  19. Row 1 / Column 8 → 6 (Hidden Single)
  20. Row 6 / Column 8 → 4 (Naked Single)
  21. Row 3 / Column 8 → 7 (Naked Single)
  22. Row 7 / Column 2 → 4 (Hidden Single)
  23. Row 7 / Column 7 → 6 (Naked Single)
  24. Row 7 / Column 1 → 9 (Naked Single)
  25. Row 8 / Column 9 → 4 (Naked Single)
  26. Row 1 / Column 1 → 7 (Naked Single)
  27. Row 1 / Column 5 → 9 (Full House)
  28. Row 7 / Column 8 → 8 (Naked Single)
  29. Row 9 / Column 8 → 9 (Full House)
  30. Row 8 / Column 3 → 6 (Naked Single)
  31. Row 8 / Column 6 → 9 (Full House)
  32. Row 3 / Column 9 → 3 (Naked Single)
  33. Row 2 / Column 7 → 4 (Full House)
  34. Row 2 / Column 1 → 1 (Naked Single)
  35. Row 2 / Column 6 → 3 (Naked Single)
  36. Row 9 / Column 5 → 6 (Naked Single)
  37. Row 5 / Column 3 → 7 (Naked Single)
  38. Row 3 / Column 6 → 2 (Naked Single)
  39. Row 4 / Column 6 → 6 (Full House)
  40. Row 2 / Column 3 → 9 (Naked Single)
  41. Row 3 / Column 3 → 4 (Full House)
  42. Row 2 / Column 4 → 7 (Full House)
  43. Row 3 / Column 5 → 1 (Full House)
  44. Row 6 / Column 5 → 3 (Naked Single)
  45. Row 4 / Column 3 → 1 (Naked Single)
  46. Row 9 / Column 3 → 8 (Full House)
  47. Row 9 / Column 2 → 1 (Full House)
  48. Row 5 / Column 9 → 6 (Naked Single)
  49. Row 4 / Column 9 → 7 (Full House)
  50. Row 7 / Column 4 → 3 (Naked Single)
  51. Row 6 / Column 4 → 1 (Full House)
  52. Row 4 / Column 5 → 2 (Full House)
  53. Row 7 / Column 5 → 7 (Full House)
  54. Row 4 / Column 2 → 3 (Full House)
  55. Row 6 / Column 2 → 8 (Full House)
  56. Row 6 / Column 7 → 2 (Naked Single)
  57. Row 5 / Column 7 → 3 (Full House)
  58. Row 5 / Column 1 → 2 (Full House)
  59. Row 6 / Column 1 → 6 (Full House)
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