There is a parable of a king who lost his kingdom, and it all started with a promise of a single grain of rice. The king, excited about the game of chess, offered one wish to the inventor of the game. The sage inventor asked the king to place one grain on rice on the first square of the chessboard, two on the second, four on the third and so on – and to keep doubling the grains on each of the subsequent 64 squares of the chess board.

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