How do I solve Bulldoku level 72?

Follow the 7 steps above: find forced placements first, then mark impossible cells with X.

Where can I play level 72 online?

Click "Play Level 72" to open the free browser game with this exact board.

4×4 · 7 steps · difficulty 27.7

Step-by-step Bulldoku level 72 guide (4×4). One pup per color, row and column, no touching. Difficulty 27.7.

1. 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 1
2. 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 2
3. 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 3
4. Step: place pup (row 1, column 3)
After previous pups, row 1 has only one free cell — column 3. Place the cyan region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 4
5. 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 5
6. 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 6
7. Step: place pup (row 3, column 4)
After previous pups, row 3 has only one free cell — column 4. Place the mint region's pup here. Mark crosses along the row, column, and neighboring cells (see the board).
Board after step 7

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

Solved board

How do I solve Bulldoku level 72?: Follow the 7 steps above: find forced placements first, then mark impossible cells with X.
Where can I play level 72 online?: Click "Play Level 72" to open the free browser game with this exact board.