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

This Sudoku Puzzle has 57 steps and it is solved using Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Locked Pair, Naked Pair, Naked Triple, Uniqueness Test 4, undefined, Naked Single, Full House, Hidden Single techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 9 in b2 => r3c2<>9
  2. Locked Candidates Type 1 (Pointing): 6 in b3 => r3c46<>6
  3. Locked Candidates Type 1 (Pointing): 4 in b7 => r9c6<>4
  4. Locked Candidates Type 1 (Pointing): 7 in b7 => r9c456<>7
  5. Locked Candidates Type 2 (Claiming): 1 in c1 => r9c23<>1
  6. Locked Candidates Type 2 (Claiming): 3 in c1 => r9c23<>3
  7. Locked Candidates Type 2 (Claiming): 5 in c5 => r45c4,r5c6<>5
  8. Locked Pair: 3,6 in r5c46 => r5c3,r6c5<>3, r4c4,r5c9<>6
  9. Naked Pair: 3,7 in r1c59 => r1c23<>3, r1c23<>7
  10. Naked Triple: 3,6,7 in r3c279 => r3c46<>3, r3c46<>7
  11. Uniqueness Test 4: 3/6 in r2c46,r5c46 => r2c46<>3
  12. Locked Candidates Type 1 (Pointing): 3 in b2 => r9c5<>3
  13. XY-Chain: 6 6- r3c7 -3- r3c2 -7- r9c2 -4- r1c2 -9- r4c2 -6 => r4c7<>6
  14. Row 4 / Column 7 → 8 (Naked Single)
  15. Row 4 / Column 4 → 7 (Naked Single)
  16. Row 4 / Column 5 → 5 (Naked Single)
  17. Row 4 / Column 3 → 9 (Naked Single)
  18. Row 4 / Column 2 → 6 (Full House)
  19. Row 6 / Column 5 → 8 (Naked Single)
  20. Row 1 / Column 3 → 4 (Naked Single)
  21. Row 9 / Column 5 → 2 (Naked Single)
  22. Row 1 / Column 2 → 9 (Naked Single)
  23. Row 9 / Column 3 → 7 (Naked Single)
  24. Row 9 / Column 2 → 4 (Naked Single)
  25. Row 8 / Column 6 → 7 (Hidden Single)
  26. Row 2 / Column 6 → 6 (Naked Single)
  27. Row 2 / Column 4 → 2 (Naked Single)
  28. Row 5 / Column 6 → 3 (Naked Single)
  29. Row 5 / Column 4 → 6 (Full House)
  30. Row 9 / Column 6 → 9 (Naked Single)
  31. Row 3 / Column 6 → 5 (Naked Single)
  32. Row 7 / Column 6 → 4 (Full House)
  33. Row 8 / Column 4 → 3 (Naked Single)
  34. Row 3 / Column 4 → 9 (Naked Single)
  35. Row 7 / Column 7 → 3 (Naked Single)
  36. Row 8 / Column 1 → 1 (Naked Single)
  37. Row 9 / Column 1 → 3 (Full House)
  38. Row 9 / Column 4 → 8 (Naked Single)
  39. Row 7 / Column 4 → 5 (Full House)
  40. Row 7 / Column 9 → 8 (Full House)
  41. Row 9 / Column 9 → 1 (Full House)
  42. Row 3 / Column 7 → 6 (Naked Single)
  43. Row 8 / Column 7 → 4 (Naked Single)
  44. Row 8 / Column 9 → 9 (Full House)
  45. Row 6 / Column 7 → 1 (Full House)
  46. Row 5 / Column 9 → 5 (Naked Single)
  47. Row 5 / Column 3 → 1 (Full House)
  48. Row 6 / Column 9 → 6 (Full House)
  49. Row 6 / Column 2 → 3 (Naked Single)
  50. Row 6 / Column 3 → 5 (Full House)
  51. Row 2 / Column 3 → 3 (Full House)
  52. Row 3 / Column 2 → 7 (Naked Single)
  53. Row 2 / Column 2 → 1 (Full House)
  54. Row 2 / Column 5 → 7 (Full House)
  55. Row 3 / Column 9 → 3 (Full House)
  56. Row 1 / Column 5 → 3 (Full House)
  57. Row 1 / Column 9 → 7 (Full House)
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