A year ago…

  (Holy Saturday, 2007) —

From Friedrich Froebel,
who invented kindergarten:

Froebel's Third Gift

For further details, see
Gift of the Third Kind
and
  Kindergarten Relativity.

Related material:

“… There was a problem laid out on the board, a six-mover. I couldn’t solve it, like a lot of my problems. I reached down and moved a knight…. I looked down at the chessboard. The move with the knight was wrong. I put it back where I had moved it from. Knights had no meaning in this game. It wasn’t a game for knights.”


— Raymond Chandler, The Big Sleep

Perhaps, instead,
a game for jumpers?

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See
Tom Stoppard’s Progress.