So, after all, is this cube considered legal in competitions or not? I haven't found a clear answer yet, maybe I haven't searched well enough on speedsolving, but there are a lot of thoughts about this. My personal opinion is that it should be illegal in competition, although I like this cube a lot. So, is there a final, official decision regarding this?

Hi Radu, No, the coloured Da Yan cube is not compliant with the current WCA Regulations, because it is possible to see colours on the back of the cube when you do a partial move (like 45 degrees). We could allow these and similar puzzles in future WCA Regulations, but I would not vote for it. Btw. the coloured Da Yan is a great puzzle. I was told that Da Yan means 'large goose', but that it is originally Da Yan Toe which means 'heavy smoker'. Have fun, Ron

[quote="Ron":3rubl96v] No, the coloured Da Yan cube is not compliant with the current WCA Regulations, because it is possible to see colours on the back of the cube when you do a partial move (like 45 degrees). We could allow these and similar puzzles in future WCA Regulations, but I would not vote for it. [/quote:3rubl96v] Thanks for the reply. I will redirect people to this topic to see the answer if they are still confused. Actually, I'm really thinking the same way, because of the 45 degrees issue. As I said in the first post, even if I like this cube a lot, I don't think it should be allowed either.