3n) All puzzle and sticker brands are allowed [i:1qjmnj7k]as long as they fullfill rules stated above.[/i:1qjmnj7k] Just to clarify.

Updated in 3n). [version March 19]

3e) The colours of puzzles must be solid, the same per colour, and clearly distinct from other colours. So, is it not allow to use cube which glow in the light? [img:ry9ouw5l]http://www.unicube.tw/Bid/LIGHT%20(5).JPG[/img:ry9ouw5l]

From my understanding, they are ok, as long as there is lighting in the venue (the glow-in-the-dark effect would not be observed).