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Vision

The board sense every calculation is built on top of.

Coordinates

Four 60-second drills on the plumbing everything else sits on. Start here.

  • Name the squareA square lights up. Name it.
  • Light or darkNo board. Say whether the square is light or dark.
  • Knight hopsFewest knight moves between two squares.
  • Who attacks this squareClick every piece hitting the marked square.

Blindfold

A whole game against the engine with the board hidden. Moves in notation, take backs when you need them, a peek when you are properly lost, and four strengths to pick from.

Recall

Look at a position, lose it, rebuild it square by square. Drawn from lines you actually play.

Calculation

Follow a forcing line in your head with the board hidden, then answer one question about where it ended.