The black rook is x-rating the white queen through the white king, and if the king moves the queen will be captured, but white can capture the rook with their knight instead of moving their king.
Here the black bishop is x-raying the white rook through the white queen and if the queen moves off the diagonal the rook will be lost but the white queen can capture the undefended black bishop instead of moving off the diagonal.
In both positions the only way for black to win material, on the next move, is if white blunders but do they still qualify as skewers?
The black rook is x-rating the white queen through the white king, and if the king moves the queen will be captured, but white can capture the rook with their knight instead of moving their king.
Here the black bishop is x-raying the white rook through the white queen and if the queen moves off the diagonal the rook will be lost but the white queen can capture the undefended black bishop instead of moving off the diagonal.
In both positions the only way for black to win material, on the next move, is if white blunders but do they still qualify as skewers?