On 2011-08-06, I made an video about my own solution to one of IPP2011 entries, which in fact is not an official one.
Neither do I know the original designer.
But I guess the designer may be Kirill Grebnev since I recognize the materials he likes to use.
Before the announcement of the IPP 2011 result, I made and uploaded this video.
Because after the announcement, when the audience saw this video, she/he will speculate that this solution is due to the official one which is "printed" on the official website.
However, this string puzzle is made according to just one photo appearing in the entries list of IPP2011.so it may not be the exact one as the original design.
stringpuzzle 6 months ago