Fast daily reps for the eyes. One minute a game, beat your best.
Tap every square the piece covers. Sixty seconds, beat your best.
Spot the loose pieces — count attackers vs defenders before they do.
Something is hanging. Find the piece you can just take.
Find the named square, fast. Board vision from zero.
The king is in check. Tap every square it can run to.
Deliver mate in one, over and over, against the clock.
Take out the guard, then take what it was guarding.
Pile onto the pin until something breaks.
Which white pieces attack this one? Find them all.
Route the knight to the target square in the fewest hops.