Two of these groups are very easy, but the other two require some very specialist knowledge.

Came to make the same comment as JamesD. Scored 4/10 and I imagine most people will as well.

Just to expand on this point a little - try looking at it from a user's perspective. We come to your grid with nothing to go on apart from the name you're using, which often gives no useful information. If two groups jump right out, it's logical for us to be looking for the rest at the same kind of level.

Now, you could say that's clever misdirection: you get us "digging in the wrong place". However, that only really stands for anything if your goal is to "win", that is, not to let anyone score 10/10.

However, there's no real benefit there. Winning is easy. All the cards are in your hand. Just select groups like "anagrams of lobsters, by scientific name" or "West Ham left backs of the 1970s". "Paul Merton Teammates on Have I Got News For You, seasons 1-54".

Great. That's like offering someone a game of chess, and only giving them pawns.

The challenge when setting a grid is not to make people lose. That's the easiest thing in the world. The challenge is to come up with something creative and fun - a grid that people can solve and smile, or fail to solve and smile all the more when they see what they were missing.

This grid could only really fall into one of those categories for someone from the southern UK, aged 21-35, with a strong interest in IT and computer science. For the vast majority of users here, it's 30 seconds pulling out two groups, two and a half minutes staring at a screen, and then no enlightenment when the answers are revealed. Huh.

For an example of a very recent grid that makes a fun challenge without relying on anything too obscure, take a look at #15189, by Mister To.

Well said, JamesD. I've thought, "Who on earth would know something like that?" far too often. NSKR: no specialist knowledge required.

Wow I didn't expect such a detailed analysis of my wall! I appreciate your comments - it was my first attempt at creating my own wall so it's constructive to hear where I went wrong.

I guess I was trying to overcompensate for two quite easy groups with my harder ones but obviously went a little overboard!

I'll take your comments on board for my next one, cheers guys!

4/10 I usually dismiss the culturally British lines as non-bothersome because i'm an American. So I thought this was fine. On the 3 other lines I knew 3 or 4 of each clue. There should be a better place (and a place to discuss the "philosophy of Wall-building" Mr. Nick, I'm sorry it's your wall. (I include my twitter handle on all comments so if someone wants to talk...we can)

It's free! ;)

Well I enjoyed this anyway, even if I did only get a 4/10. I'm not so insecure as to become upset when I don't ace a free online game... ;)

Nick692 - more grids, please! Enjoyed it. :)