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

This Sudoku Puzzle has 49 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Turbot Fish, Naked Single, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 7 / Column 7 → 2 (Hidden Single)
  2. Row 7 / Column 2 → 8 (Hidden Single)
  3. Row 9 / Column 7 → 8 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 7 in b1 => r3c5<>7
  5. Locked Candidates Type 1 (Pointing): 4 in b6 => r8c9<>4
  6. Locked Candidates Type 1 (Pointing): 6 in b7 => r23c1<>6
  7. Locked Candidates Type 2 (Claiming): 5 in c3 => r23c1,r3c2<>5
  8. 2-String Kite: 3 in r4c1,r7c6 (connected by r4c5,r6c6) => r7c1<>3
  9. Turbot Fish: 3 r4c5 =3= r4c1 -3- r8c1 =3= r9c2 => r9c5<>3
  10. XY-Wing: 6/7/3 in r1c36,r6c6 => r6c3<>3
  11. Row 6 / Column 3 → 1 (Naked Single)
  12. Row 5 / Column 9 → 1 (Hidden Single)
  13. Row 5 / Column 8 → 2 (Hidden Single)
  14. Row 3 / Column 9 → 2 (Hidden Single)
  15. Row 1 / Column 5 → 2 (Hidden Single)
  16. Row 4 / Column 7 → 5 (Hidden Single)
  17. Row 2 / Column 1 → 2 (Hidden Single)
  18. Row 1 / Column 6 → 7 (Hidden Single)
  19. Row 6 / Column 6 → 3 (Naked Single)
  20. Row 4 / Column 5 → 7 (Full House)
  21. Row 4 / Column 9 → 4 (Naked Single)
  22. Row 4 / Column 1 → 3 (Full House)
  23. Row 2 / Column 5 → 1 (Hidden Single)
  24. Row 3 / Column 1 → 1 (Hidden Single)
  25. Row 6 / Column 1 → 4 (Hidden Single)
  26. Row 9 / Column 2 → 3 (Hidden Single)
  27. Row 3 / Column 2 → 7 (Naked Single)
  28. Row 5 / Column 2 → 5 (Full House)
  29. Row 5 / Column 1 → 7 (Full House)
  30. Row 9 / Column 9 → 6 (Naked Single)
  31. Row 9 / Column 5 → 5 (Full House)
  32. Row 6 / Column 9 → 7 (Naked Single)
  33. Row 6 / Column 7 → 6 (Full House)
  34. Row 8 / Column 7 → 7 (Full House)
  35. Row 8 / Column 9 → 3 (Full House)
  36. Row 3 / Column 5 → 6 (Naked Single)
  37. Row 2 / Column 6 → 5 (Full House)
  38. Row 7 / Column 6 → 6 (Full House)
  39. Row 2 / Column 3 → 6 (Full House)
  40. Row 3 / Column 8 → 3 (Naked Single)
  41. Row 1 / Column 8 → 6 (Full House)
  42. Row 1 / Column 3 → 3 (Full House)
  43. Row 3 / Column 3 → 5 (Full House)
  44. Row 8 / Column 5 → 4 (Naked Single)
  45. Row 7 / Column 5 → 3 (Full House)
  46. Row 7 / Column 1 → 5 (Naked Single)
  47. Row 7 / Column 8 → 4 (Full House)
  48. Row 8 / Column 8 → 5 (Full House)
  49. Row 8 / Column 1 → 6 (Full House)
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