Tap every square the piece covers. Sixty seconds, beat your best.
Tap the attackers. Tap the defenders.
Something is hanging. Find the piece you can just take.
Find the named square, fast.
The king is in check. Tap every safe square it can move to.
Deliver mate in one, over and over, against the clock.
Capture the piece that protects the target.
Spot every piece pinned to its king or to a bigger piece.
Bring another piece to attack the pinned piece.
Route the knight to the target square in the fewest moves.
Jump the knight to hit two pieces, then take the one left behind.