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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Pair, Naked Single, Full House, Uniqueness Test 1, Finned Swordfish, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 6 → 9 (Hidden Single)
  2. Row 6 / Column 1 → 3 (Hidden Single)
  3. Row 9 / Column 9 → 4 (Hidden Single)
  4. Row 1 / Column 4 → 3 (Hidden Single)
  5. Row 5 / Column 2 → 1 (Hidden Single)
  6. Row 9 / Column 6 → 3 (Hidden Single)
  7. Row 4 / Column 2 → 4 (Hidden Single)
  8. Row 5 / Column 5 → 3 (Hidden Single)
  9. Row 6 / Column 7 → 4 (Hidden Single)
  10. Row 5 / Column 6 → 4 (Hidden Single)
  11. Row 3 / Column 5 → 4 (Hidden Single)
  12. Row 3 / Column 8 → 1 (Hidden Single)
  13. Row 2 / Column 5 → 1 (Hidden Single)
  14. Row 1 / Column 1 → 1 (Hidden Single)
  15. Row 6 / Column 9 → 1 (Hidden Single)
  16. Row 6 / Column 3 → 7 (Hidden Single)
  17. Row 4 / Column 9 → 7 (Hidden Single)
  18. Row 2 / Column 1 → 7 (Hidden Single)
  19. Row 5 / Column 4 → 7 (Hidden Single)
  20. Row 7 / Column 6 → 7 (Hidden Single)
  21. Row 9 / Column 2 → 7 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 8 in b2 => r79c4<>8
  23. Locked Candidates Type 1 (Pointing): 9 in b7 => r8c7<>9
  24. Locked Pair: 5,6 in r8c79 => r7c789,r8c135,r9c8<>5, r7c789,r8c35,r9c8<>6
  25. Row 7 / Column 9 → 3 (Naked Single)
  26. Row 7 / Column 7 → 9 (Naked Single)
  27. Row 2 / Column 7 → 3 (Hidden Single)
  28. Row 5 / Column 8 → 9 (Hidden Single)
  29. Row 5 / Column 3 → 5 (Full House)
  30. Row 9 / Column 1 → 5 (Hidden Single)
  31. Uniqueness Test 1: 8/9 in r4c13,r8c13 => r8c3<>8, r8c3<>9
  32. Row 8 / Column 3 → 2 (Naked Single)
  33. Row 8 / Column 5 → 8 (Naked Single)
  34. Row 8 / Column 1 → 9 (Naked Single)
  35. Row 4 / Column 1 → 8 (Full House)
  36. Row 4 / Column 3 → 9 (Full House)
  37. Finned Swordfish: 5 c679 r248 fr3c6 => r2c4<>5
  38. Finned Swordfish: 6 c679 r248 fr3c6 => r2c4<>6
  39. W-Wing: 2/8 in r2c4,r9c8 connected by 8 in r29c3 => r9c4<>2
  40. Row 9 / Column 4 → 6 (Naked Single)
  41. Row 9 / Column 3 → 8 (Naked Single)
  42. Row 2 / Column 3 → 6 (Full House)
  43. Row 7 / Column 2 → 6 (Full House)
  44. Row 9 / Column 8 → 2 (Full House)
  45. Row 1 / Column 2 → 5 (Naked Single)
  46. Row 1 / Column 8 → 6 (Full House)
  47. Row 2 / Column 9 → 5 (Full House)
  48. Row 3 / Column 2 → 8 (Full House)
  49. Row 8 / Column 9 → 6 (Full House)
  50. Row 8 / Column 7 → 5 (Full House)
  51. Row 7 / Column 8 → 8 (Full House)
  52. Row 6 / Column 8 → 5 (Full House)
  53. Row 4 / Column 7 → 6 (Full House)
  54. Row 6 / Column 5 → 6 (Full House)
  55. Row 2 / Column 6 → 2 (Naked Single)
  56. Row 2 / Column 4 → 8 (Full House)
  57. Row 3 / Column 4 → 5 (Naked Single)
  58. Row 3 / Column 6 → 6 (Full House)
  59. Row 4 / Column 6 → 5 (Full House)
  60. Row 7 / Column 4 → 2 (Full House)
  61. Row 4 / Column 5 → 2 (Full House)
  62. Row 7 / Column 5 → 5 (Full House)
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