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Chess Coordinates Trainer: Square Rush
Tap each square as it is called, as many as you can in 30 seconds.
Chess coordinates trainer
Square Rush is a chess coordinates trainer. A square such as e4 is called and you tap it on a board with no labels. You have 30 seconds; a wrong tap costs 1.5 seconds and every 10 in a row give one back. As you go, the board turns to Black's side, then loses its colours, then its lines.
A square's name is its file, a to h from White's left, then its rank, 1 to 8 from White's side. Knowing them without looking is what makes algebraic chess notation quick to read. A typical first run finds 17 squares, and 22 puts you in the top quarter.