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An exchange puzzle from the IPP17 in San Francisco, August 16-17, 1997.
This puzzle was exchanged by Lee Yee Dian during the IPP17 in San Francisco, 1997 but the designer was Jean-Claude Constantin.
Thank you to the following people for their assistance in helping collect the information on this page: Geert Hellings.
This puzzle can be found in collections of these members:
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