The following puzzles last moves make no sense. Can anyone explain them?
https://www.chess.com/puzzles/problem/1006830/practice
https://www.chess.com/puzzles/problem/542968/practice
In the first puzzle it's just making sure you catch the threat to the bishop and the second, the move attacks black's bishop if the white bishop is taken.
The following puzzle last move makes no sense.
https://www.chess.com/puzzles/problem/542968/practice