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

This Sudoku Puzzle has 18 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), undefined, Discontinuous Nice Loop, Give Up techniques.

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

Solution Steps:

  1. Row 1 / Column 8 → 9 (Naked Single)
  2. Row 5 / Column 4 → 6 (Naked Single)
  3. Row 3 / Column 5 → 9 (Naked Single)
  4. Row 5 / Column 6 → 7 (Naked Single)
  5. Row 2 / Column 4 → 4 (Naked Single)
  6. Row 2 / Column 6 → 6 (Naked Single)
  7. Row 3 / Column 4 → 8 (Naked Single)
  8. Row 2 / Column 5 → 7 (Full House)
  9. Row 6 / Column 4 → 9 (Full House)
  10. Row 1 / Column 9 → 8 (Hidden Single)
  11. Row 4 / Column 6 → 8 (Hidden Single)
  12. Row 8 / Column 7 → 9 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 5 in b3 => r2c13<>5
  14. Locked Candidates Type 1 (Pointing): 1 in b5 => r78c5<>1
  15. Locked Candidates Type 1 (Pointing): 7 in b9 => r46c9<>7
  16. Finned X-Wing: 1 r39 c29 fr9c7 fr9c8 => r78c9<>1
  17. Discontinuous Nice Loop: 3 r7c9 -3- r7c5 -6- r8c5 =6= r8c9 =7= r7c9 => r7c9<>3
  18. Give Up: Don't know how to proceed!
Show More...