[Question]
white king at c3, queen at b7. Black king at a2. White to move

[Answer]
qb2

[Question]
white king at d5, rooks at f8 and g2. Black king at h4. White to move

[Answer]
rh8

[Question]
white king at c7, rook at b3. Black king at a7. White to move

[Answer]
ra3

