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

This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, undefined, Full House, Turbot Fish, Locked Candidates Type 2 (Claiming) techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 8 → 3 (Hidden Single)
  2. Row 6 / Column 5 → 8 (Hidden Single)
  3. Row 9 / Column 4 → 9 (Hidden Single)
  4. Row 6 / Column 8 → 5 (Hidden Single)
  5. Row 6 / Column 1 → 9 (Hidden Single)
  6. Row 4 / Column 5 → 9 (Hidden Single)
  7. Row 8 / Column 7 → 9 (Hidden Single)
  8. Locked Candidates Type 1 (Pointing): 8 in b8 => r1c6<>8
  9. Naked Triple: 2,4,6 in r2c578 => r2c1349<>2, r2c149<>6, r2c9<>4
  10. Row 2 / Column 9 → 8 (Naked Single)
  11. Row 3 / Column 1 → 6 (Hidden Single)
  12. Row 1 / Column 4 → 8 (Hidden Single)
  13. Row 1 / Column 3 → 3 (Hidden Single)
  14. Row 2 / Column 4 → 3 (Hidden Single)
  15. Row 8 / Column 1 → 3 (Hidden Single)
  16. Locked Candidates Type 1 (Pointing): 2 in b1 => r5789c2<>2
  17. Locked Candidates Type 1 (Pointing): 5 in b2 => r3c2<>5
  18. W-Wing: 5/7 in r2c1,r5c2 connected by 7 in r26c3 => r4c1<>5
  19. Row 4 / Column 1 → 2 (Naked Single)
  20. Row 9 / Column 1 → 7 (Naked Single)
  21. Row 2 / Column 1 → 5 (Full House)
  22. Row 7 / Column 2 → 4 (Naked Single)
  23. Row 2 / Column 3 → 7 (Naked Single)
  24. Row 9 / Column 2 → 8 (Naked Single)
  25. Row 6 / Column 3 → 1 (Naked Single)
  26. Row 8 / Column 2 → 5 (Naked Single)
  27. Row 8 / Column 3 → 2 (Full House)
  28. Row 4 / Column 3 → 5 (Full House)
  29. Row 5 / Column 2 → 7 (Full House)
  30. Row 6 / Column 9 → 2 (Naked Single)
  31. Row 6 / Column 7 → 7 (Full House)
  32. Row 7 / Column 6 → 7 (Hidden Single)
  33. Row 8 / Column 6 → 8 (Hidden Single)
  34. Turbot Fish: 6 r1c6 =6= r2c5 -6- r8c5 =6= r8c9 => r1c9<>6
  35. Row 1 / Column 9 → 1 (Naked Single)
  36. Row 9 / Column 8 → 1 (Hidden Single)
  37. Locked Candidates Type 2 (Claiming): 4 in c8 => r2c7<>4
  38. W-Wing: 6/2 in r1c6,r2c7 connected by 2 in r9c67 => r1c8,r2c5<>6
  39. Row 1 / Column 6 → 6 (Hidden Single)
  40. Row 4 / Column 6 → 1 (Naked Single)
  41. Row 3 / Column 5 → 1 (Hidden Single)
  42. Row 5 / Column 7 → 1 (Hidden Single)
  43. W-Wing: 4/2 in r2c5,r9c6 connected by 2 in r29c7 => r3c6,r8c5<>4
  44. Row 8 / Column 5 → 6 (Naked Single)
  45. Row 8 / Column 9 → 4 (Full House)
  46. Row 4 / Column 9 → 6 (Full House)
  47. Row 4 / Column 7 → 4 (Full House)
  48. Row 5 / Column 5 → 2 (Naked Single)
  49. Row 2 / Column 5 → 4 (Full House)
  50. Row 7 / Column 4 → 2 (Naked Single)
  51. Row 7 / Column 8 → 6 (Full House)
  52. Row 9 / Column 7 → 2 (Full House)
  53. Row 9 / Column 6 → 4 (Full House)
  54. Row 2 / Column 7 → 6 (Full House)
  55. Row 2 / Column 8 → 2 (Full House)
  56. Row 5 / Column 6 → 5 (Naked Single)
  57. Row 3 / Column 6 → 2 (Full House)
  58. Row 3 / Column 4 → 5 (Full House)
  59. Row 5 / Column 4 → 6 (Full House)
  60. Row 1 / Column 8 → 9 (Naked Single)
  61. Row 1 / Column 2 → 2 (Full House)
  62. Row 3 / Column 2 → 9 (Full House)
  63. Row 3 / Column 8 → 4 (Full House)
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