Hi, about this regulation: 3l) A cube puzzle may have a logo, but it must have at most one logo. For the Rubik's Cube or bigger cube puzzles the logo must be placed on one of the centre pieces. There is a limitation about where the logo can be place for Rubik's cubes and bigger puzzles (nxn with n>3). But what about other puzzles? I know that if the logo is placed in a corner in a rubik's cube you can get some advantage because you will be able so recognize that corner when you see the logo (and not the other 2 colors) but we have the same problem with other puzzles: pyraminx, megaminx, square1, etc. For example here you can buy a square1 with logo placed on a corner: http://www.lubixcube.com/Square_1.html#0

[quote:17e46njw]3j) Puzzles must be clean, and must not have any markings, elevated pieces, damage, or other differences that distinguish any piece from a similar piece.[/quote:17e46njw] The intent is that no piece has any identifying mark that allows a cuber to gain more information than they would if it did not have the mark. A printed logo on a 3x3x3 center satisfies this, but logos on corners are not allowed. The WRC is aware that this hasn't been handled very consistently, so we will aim to make sure the Regulations are clear about it in the next version.