Imagine playing twenty games of chess at once, with the clocks running down, only you can’t touch the board yourself, but have to make each move through one of those joke cascade devices where a flipped switch rolls a ball down an inclined plane to knock open a door, which releases a mouse, and a cat to chase the mouse, but when the mouse runs into its hole it trips a wire that causes a broom to sweep down, and so on until finally a dart pops a balloon that lets a weight fall that that pushes the piece into place. Only at any time your opponent may change the game to checkers. Or Go. Or
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