How do I solve Bulldoku level 7?

Follow the 4 steps above: find forced placements first, then mark impossible cells with X.

Where can I play level 7 online?

Click "Play Level 7" to open the free browser game with this exact board.

4×4 · 4 steps · difficulty 19.9

Step-by-step Bulldoku level 7 guide (4×4). One pup per color, row and column, no touching. Difficulty 19.9.

1. Step: place pup (row 3, column 4)
After crosses, the mint region has only one legal cell — row 3, column 4. 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 1, column 3)
After previous pups, column 3 has only one free cell — row 1. Place the cyan region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 2
3. Step: place pup (row 2, column 1)
After previous pups, row 2 has only one free cell — column 1. Place the pink region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 3
4. Step: place pup (row 4, column 2)
After previous pups, column 2 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 4

All pups placed correctly: R1 C3, R2 C1, R3 C4, R4 C2

Solved board

How do I solve Bulldoku level 7?: Follow the 4 steps above: find forced placements first, then mark impossible cells with X.
Where can I play level 7 online?: Click "Play Level 7" to open the free browser game with this exact board.