Kublai reflected on the invisible order that sustains cities, on the rules that decreed how they rise, take shape and prosper, adapting themselves to the seasons, and then how they sadden and fall in ruins. At times he thought he was on the verge of discovering a coherent, harmonious system underlying the infinite deformities and discords, but no model could stand up to the comparison with the game of chess. Perhaps, instead of racking one’s brain to suggest with the ivory pieces’ scant help visions which were anyway destined to oblivion, it would suffice to play a game according to the rules,
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