The Eternity II puzzle (E2 or E II) is an edge-matching puzzle launched on 28 July 2007.[1][2] It was developed by Christopher Monckton and marketed and copyrighted by TOMY UK Ltd as a successor to the original Eternity puzzle. The puzzle was part of a competition in which a $2 million prize was offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found.
- ^ "Investegate |TOMY Announcements | TOMY: Eternity II Global Launch at Hamleys With US$2 ..." investegate.co.uk. PR Newswire. 26 July 2007. Retrieved 5 October 2020.
- ^ "Television interview with Christopher Monckton and Brendan Owen". Mornings with Kerri-Anne, Brendan Owen's channel, YouTube. 26 July 2007. Archived from the original on 21 December 2021.