Bulldoku Level 685: Walkthrough & Solution
Step-by-step Bulldoku level 685 guide (9×9). One pup per color, row and column, no touching. Difficulty 58.2.
Play Level 685Step-by-step logic
1. Step: place pup (row 1, column 2)
After crosses, the cyan region has only one legal cell — row 1, column 2. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 1 2. Step: place pup (row 8, column 8)
After crosses, the blue region has only one legal cell — row 8, column 8. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 2 3. Step: place pup (row 3, column 7)
After crosses, the mint region has only one legal cell — row 3, column 7. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 3 4. Step: place pup (row 4, column 1)
After crosses, the yellow region has only one legal cell — row 4, column 1. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 4 5. Step: place pup (row 5, column 5)
After crosses, the orange region has only one legal cell — row 5, column 5. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 5 6. Step: mark X in row 7
The green region is confined to row 7. Mark X on cells in that row that belong to other regions.
Board after step 6 7. Step: place pup (row 9, column 6)
After previous pups, column 6 has only one free cell — row 9. Place the coral region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 7 8. Step: logical elimination
Placing a pup on the trial cell would leave a region with no legal move. Mark that cell with X.
Board after step 8 9. Step: place pup (row 2, column 4)
After previous pups, row 2 has only one free cell — column 4. Place the pink region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 9 10. Step: place pup (row 7, column 3)
After previous pups, column 3 has only one free cell — row 7. Place the green region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 10 11. Step: place pup (row 6, column 9)
After previous pups, row 6 has only one free cell — column 9. Place the lavender region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 11
Final solution
All pups placed correctly: R1 C2, R2 C4, R3 C7, R4 C1, R5 C5, R6 C9, R7 C3, R8 C8, R9 C6
Similar difficulty levels
FAQ
- How do I solve Bulldoku level 685?
- Follow the 11 steps above: find forced placements first, then mark impossible cells with X.
- Where can I play level 685 online?
- Click "Play Level 685" to open the free browser game with this exact board.