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Xuan Xuan Qijing | 76 |
This classic Chinese text dates from the fourteenth century, originally published in 1347 by Yan Defu and Yan Tianzhang. The problems take fanciful and historical aspects, with themes relating to stories and events. For example, in the 'Mother of Seven Sons' problem, the seven sons refers to seven white stones at the core of the problem. Known in Japanese as 'Gen Gen Go Kyo.' |
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