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Eight Track Eight Track is an eight-band puzzle ring, developed according to Bram Cohen’s recipe (http://bramcohen.livejournal.com/47101.html). The object of the puzzle is to scramble the rings and the restore its original ring shape.
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to other years
IPP15, Tokyo 1995
IPP16, Luxembourg 1996
IPP17, San Francisco 1997
IPP18, Tokyo 1998
IPP19, London 1999
IPP20, Los Angeles 2000
IPP21, Tokyo 2001
IPP22, Antwerp 2002
IPP23, Chicago 2003
IPP24, Tokyo 2004
IPP25, Helsinki 2005
IPP26, Boston 2006
IPP27, Gold Coast 2007
IPP28, Praque 2008
IPP29,San Francisco 2009
IPP30, Osaka 2010
IPP31, Berlin 2011
IPP32, Washington 2012
IPP33, Narita 2013
IPP34, London 2014
IPP35, Ottawa 2015
IPP36, Kyoto 2016
IPP37, Paris 2017
