Go Puzzles

Here are some Go puzzles I've composed. Some of them were composed or analyzed with the help of the Katago engine.

Rug

Black to move.

Difficulty: ★☆☆☆☆

Bed

Black to move.

Difficulty: ★☆☆☆☆

UFO

Black to move.

Difficulty: ★☆☆☆☆

Hat

Black to move.

Difficulty: ★★☆☆☆

Hat+

Black to move.

Difficulty: ★★☆☆☆

Two

Black to move. Assume there are no large moves or ko threats outside the shown area.

Difficulty: ★★★☆☆

Cat

Black to move.

Difficulty: ★★★☆☆

Cat+

Black to move.

Difficulty: ★★★☆☆

Car

Black to move.

Difficulty: ★★★☆☆

Sus

Black to move. Assume there are no large moves or ko threats outside the shown area.

Difficulty: ★★★☆☆

Box

Black to move. Find the best possible result in a typical late middlegame.

Difficulty: ★★★☆☆

Box+

Black to move.

Difficulty: ★★★☆☆

Box++

Black to move. Assume that white can win any ko.

Difficulty: ★★★★☆

End

Black to move. Assume the rest of the board is fully settled.

Difficulty: ★★★★☆

Mud

Black to move. Assume that black has one large ko threat outside the shown area and white has none.

Difficulty: ★★★★☆

Dog

Black to move. Find the best possible ko.

Difficulty: ★★★★☆