One piece will move. Spot which.

What Moved

What Moved trains you to notice change on the board. A position of eight pieces is shown for three seconds, then shown again with one piece standing on a different square. Tap the piece that moved. There are ten rounds, and after each one the page shows where the piece came from.

How to play

  1. Press Start and look at the position for three seconds.
  2. When the position changes, tap the piece that now stands on a new square.
  3. The page marks the square it moved to and the square it came from, then you go on. After ten rounds you see how many you spotted.

Questions

Why is this useful?
After every move of your opponent the first question is what changed: which squares the piece left unguarded and which it now attacks. This game drills the first half of that habit, seeing the change at all.
Is the change a legal chess move?
Not necessarily. One piece is lifted and put down on an empty square, wherever it is, so that you have to look at the whole board.
Can I see the first position again?
No. It is shown once, for three seconds.

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