<p>Berlekamp et al quote G. W. Leibniz:</p>
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The game called Solitaire pleases me much. I take it in reverse order. That is to say that
instead of making a configuration according to the rules of the game, which is to jump to an
empty place and remove the piece which one has jumped, I thought it was better to reconstruct
what had been demolished, by filling an empty hole over which one has leaped.
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<p>This quote fills my heart with humility as I find it by far more difficult to solve the second puzzle.</p>
