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

This Sudoku Puzzle has 28 steps and it is solved using Locked Candidates Type 1 (Pointing), Remote Pair, Naked Single, Full House techniques.

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

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 3 in b6 => r3c9<>3
  2. Remote Pair: 6/7 r5c8 -7- r7c8 -6- r8c7 -7- r8c5 => r5c5<>6, r5c5<>7
  3. Row 5 / Column 5 → 8 (Naked Single)
  4. Row 2 / Column 5 → 9 (Naked Single)
  5. Row 2 / Column 6 → 8 (Full House)
  6. Row 4 / Column 4 → 7 (Naked Single)
  7. Row 6 / Column 6 → 6 (Full House)
  8. Row 4 / Column 9 → 8 (Full House)
  9. Row 5 / Column 2 → 3 (Naked Single)
  10. Row 6 / Column 2 → 8 (Full House)
  11. Row 6 / Column 9 → 3 (Full House)
  12. Row 9 / Column 5 → 7 (Naked Single)
  13. Row 8 / Column 5 → 6 (Full House)
  14. Row 8 / Column 7 → 7 (Full House)
  15. Row 7 / Column 8 → 6 (Full House)
  16. Row 5 / Column 8 → 7 (Full House)
  17. Row 5 / Column 9 → 6 (Full House)
  18. Row 3 / Column 9 → 7 (Full House)
  19. Row 9 / Column 1 → 3 (Naked Single)
  20. Row 7 / Column 1 → 7 (Full House)
  21. Row 7 / Column 4 → 3 (Full House)
  22. Row 3 / Column 6 → 3 (Naked Single)
  23. Row 3 / Column 7 → 6 (Full House)
  24. Row 1 / Column 7 → 3 (Full House)
  25. Row 9 / Column 4 → 8 (Naked Single)
  26. Row 9 / Column 6 → 9 (Full House)
  27. Row 1 / Column 4 → 6 (Full House)
  28. Row 1 / Column 6 → 7 (Full House)
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