Bulldoku Level 408: Walkthrough & Solution
Step-by-step Bulldoku level 408 guide (7×7). One pup per color, row and column, no touching. Difficulty 43.9.
Play Level 408Step-by-step logic
1. Step: place pup (row 1, column 3)
After crosses, the cyan region has only one legal cell — row 1, column 3. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 1 2. Step: mark X in column 6
The orange region is confined to column 6. Mark illegal cells with X.
Board after step 2 3. Step: mark X in column 6
The orange region is confined to column 6. Mark illegal cells with X.
Board after step 3 4. Step: mark X in column 6
The orange region is confined to column 6. Mark illegal cells with X.
Board after step 4 5. Step: mark X in column 7
The green region is confined to column 7. Mark illegal cells with X.
Board after step 5 6. Step: mark X in column 7
The green region is confined to column 7. Mark illegal cells with X.
Board after step 6 7. Step: mark X in column 7
The green region is confined to column 7. Mark illegal cells with X.
Board after step 7 8. Step: mark X in column 5
The pink region is confined to column 5. Mark illegal cells with X.
Board after step 8 9. Step: mark X in column 5
The pink region is confined to column 5. Mark illegal cells with X.
Board after step 9 10. Step: mark X in column 5
The pink region is confined to column 5. Mark illegal cells with X.
Board after step 10 11. Step: mark X in column 5
The pink region is confined to column 5. Mark illegal cells with X.
Board after step 11 12. Step: mark X in column 4
The yellow region is confined to column 4. Mark illegal cells with X.
Board after step 12 13. Step: mark X in column 4
The yellow region is confined to column 4. Mark illegal cells with X.
Board after step 13 14. Step: mark X in column 4
The yellow region is confined to column 4. Mark illegal cells with X.
Board after step 14 15. 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 15 16. Step: place pup (row 2, column 5)
After previous pups, row 2 has only one free cell — column 5. Place the pink region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 16 17. Step: place pup (row 4, column 4)
After previous pups, column 4 has only one free cell — row 4. Place the yellow region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 17 18. Step: place pup (row 5, column 6)
After crosses, the orange region has only one legal cell — row 5, column 6. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 18 19. Step: place pup (row 7, column 7)
After previous pups, column 7 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 19 20. Step: place pup (row 6, column 1)
After crosses, the lavender region has only one legal cell — row 6, column 1. Place a pup there. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 20 21. Step: place pup (row 3, column 2)
After previous pups, column 2 has only one free cell — row 3. Place the mint region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 21
Final solution
All pups placed correctly: R1 C3, R2 C5, R3 C2, R4 C4, R5 C6, R6 C1, R7 C7
Similar difficulty levels
FAQ
- How do I solve Bulldoku level 408?
- Follow the 21 steps above: find forced placements first, then mark impossible cells with X.
- Where can I play level 408 online?
- Click "Play Level 408" to open the free browser game with this exact board.