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

This Sudoku Puzzle has 53 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Naked Pair, Hidden Pair, undefined, Full House techniques.

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

Solution Steps:

  1. Row 4 / Column 6 → 7 (Hidden Single)
  2. Locked Candidates Type 1 (Pointing): 6 in b7 => r56c3<>6
  3. Locked Candidates Type 1 (Pointing): 2 in b8 => r5c6<>2
  4. Locked Candidates Type 1 (Pointing): 2 in b9 => r4c7<>2
  5. Locked Candidates Type 2 (Claiming): 3 in r4 => r56c8<>3
  6. Locked Candidates Type 2 (Claiming): 9 in r4 => r56c8,r6c9<>9
  7. Locked Candidates Type 2 (Claiming): 6 in c5 => r5c46,r6c4<>6
  8. Row 5 / Column 6 → 9 (Naked Single)
  9. Row 7 / Column 6 → 2 (Naked Single)
  10. Row 5 / Column 1 → 6 (Hidden Single)
  11. Row 6 / Column 2 → 9 (Hidden Single)
  12. Row 6 / Column 3 → 7 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 4 in b4 => r5c8<>4
  14. Naked Pair: 4,9 in r7c7,r8c9 => r8c7<>4, r8c7<>9
  15. Hidden Pair: 1,6 in r89c3 => r89c3<>2, r8c3<>4
  16. Locked Candidates Type 1 (Pointing): 2 in b7 => r5c2<>2
  17. W-Wing: 3/4 in r3c8,r7c3 connected by 4 in r27c7 => r3c3<>3
  18. Row 3 / Column 3 → 8 (Naked Single)
  19. Row 3 / Column 4 → 6 (Naked Single)
  20. Row 3 / Column 6 → 4 (Naked Single)
  21. Row 2 / Column 6 → 8 (Full House)
  22. Row 3 / Column 8 → 3 (Full House)
  23. Row 8 / Column 6 → 6 (Full House)
  24. Row 9 / Column 4 → 7 (Naked Single)
  25. Row 8 / Column 3 → 1 (Naked Single)
  26. Row 7 / Column 4 → 9 (Naked Single)
  27. Row 8 / Column 4 → 8 (Full House)
  28. Row 9 / Column 2 → 2 (Naked Single)
  29. Row 8 / Column 7 → 2 (Naked Single)
  30. Row 9 / Column 3 → 6 (Naked Single)
  31. Row 9 / Column 7 → 1 (Full House)
  32. Row 7 / Column 7 → 4 (Naked Single)
  33. Row 8 / Column 9 → 9 (Full House)
  34. Row 8 / Column 2 → 4 (Full House)
  35. Row 2 / Column 7 → 9 (Naked Single)
  36. Row 2 / Column 8 → 4 (Full House)
  37. Row 4 / Column 7 → 3 (Full House)
  38. Row 7 / Column 3 → 3 (Naked Single)
  39. Row 7 / Column 2 → 7 (Full House)
  40. Row 5 / Column 2 → 3 (Full House)
  41. Row 4 / Column 9 → 6 (Naked Single)
  42. Row 6 / Column 9 → 4 (Full House)
  43. Row 2 / Column 3 → 2 (Naked Single)
  44. Row 2 / Column 1 → 3 (Full House)
  45. Row 6 / Column 1 → 2 (Full House)
  46. Row 5 / Column 3 → 4 (Full House)
  47. Row 5 / Column 4 → 5 (Naked Single)
  48. Row 5 / Column 8 → 2 (Full House)
  49. Row 6 / Column 4 → 3 (Full House)
  50. Row 4 / Column 5 → 2 (Naked Single)
  51. Row 6 / Column 5 → 6 (Full House)
  52. Row 6 / Column 8 → 5 (Full House)
  53. Row 4 / Column 8 → 9 (Full House)
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