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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, undefined, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 1 → 2 (Hidden Single)
  2. Locked Candidates Type 1 (Pointing): 5 in b1 => r1c4<>5
  3. Locked Candidates Type 1 (Pointing): 4 in b4 => r7c2<>4
  4. Locked Candidates Type 1 (Pointing): 1 in b5 => r89c4<>1
  5. Locked Candidates Type 1 (Pointing): 2 in b6 => r4c45<>2
  6. Naked Triple: 4,5,7 in r2c46,r3c5 => r1c46<>4, r1c46<>7
  7. Row 1 / Column 9 → 4 (Hidden Single)
  8. Naked Triple: 4,5,7 in r2c467 => r2c3<>7
  9. Naked Triple: 6,7,9 in r5c367 => r5c4<>6, r5c45<>7, r5c45<>9
  10. Hidden Pair: 1,3 in r39c8 => r3c8<>7, r9c8<>2
  11. X-Wing: 6 c37 r57 => r5c6<>6
  12. Row 1 / Column 6 → 6 (Hidden Single)
  13. Row 1 / Column 4 → 9 (Naked Single)
  14. Naked Triple: 4,7,9 in r46c5,r5c6 => r46c4<>4, r46c4<>7
  15. Locked Candidates Type 1 (Pointing): 4 in b5 => r7c5<>4
  16. Row 7 / Column 3 → 4 (Hidden Single)
  17. Row 8 / Column 3 → 8 (Naked Single)
  18. Row 2 / Column 3 → 3 (Naked Single)
  19. Row 7 / Column 2 → 2 (Naked Single)
  20. Row 8 / Column 9 → 2 (Naked Single)
  21. Row 2 / Column 9 → 8 (Naked Single)
  22. Row 3 / Column 3 → 7 (Naked Single)
  23. Row 5 / Column 3 → 6 (Full House)
  24. Row 7 / Column 5 → 9 (Naked Single)
  25. Row 9 / Column 2 → 5 (Naked Single)
  26. Row 9 / Column 1 → 6 (Full House)
  27. Row 4 / Column 9 → 6 (Naked Single)
  28. Row 9 / Column 9 → 3 (Full House)
  29. Row 8 / Column 4 → 4 (Naked Single)
  30. Row 1 / Column 8 → 7 (Naked Single)
  31. Row 1 / Column 1 → 5 (Naked Single)
  32. Row 1 / Column 2 → 8 (Full House)
  33. Row 3 / Column 5 → 5 (Naked Single)
  34. Row 7 / Column 7 → 6 (Naked Single)
  35. Row 7 / Column 8 → 8 (Full House)
  36. Row 4 / Column 4 → 1 (Naked Single)
  37. Row 9 / Column 8 → 1 (Naked Single)
  38. Row 8 / Column 7 → 9 (Full House)
  39. Row 8 / Column 6 → 1 (Full House)
  40. Row 2 / Column 7 → 5 (Naked Single)
  41. Row 6 / Column 8 → 9 (Naked Single)
  42. Row 2 / Column 4 → 7 (Naked Single)
  43. Row 2 / Column 6 → 4 (Full House)
  44. Row 3 / Column 7 → 1 (Naked Single)
  45. Row 3 / Column 8 → 3 (Full House)
  46. Row 5 / Column 7 → 7 (Full House)
  47. Row 4 / Column 8 → 2 (Full House)
  48. Row 5 / Column 5 → 2 (Naked Single)
  49. Row 4 / Column 2 → 4 (Naked Single)
  50. Row 6 / Column 2 → 1 (Full House)
  51. Row 6 / Column 4 → 6 (Naked Single)
  52. Row 9 / Column 6 → 7 (Naked Single)
  53. Row 9 / Column 4 → 2 (Full House)
  54. Row 5 / Column 6 → 9 (Full House)
  55. Row 5 / Column 4 → 5 (Full House)
  56. Row 6 / Column 1 → 7 (Naked Single)
  57. Row 4 / Column 1 → 9 (Full House)
  58. Row 4 / Column 5 → 7 (Full House)
  59. Row 6 / Column 5 → 4 (Full House)
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