Well, I was a bit worried that my choice of word may be too limited in definitions.
Your combined ingenuity has proven me wrong - and also given me a huge task with so many excellent entries.
I make it 24 entries from 16 posters, not counting revisions.
My short list is very long, but includes chrise@2, GK@5, therogue@8, Ixion@21&33, ginge@22&30, FJ@27 &jws@31
As a winner I picked BBM2's succinct and rather oblique post # 7
Computer file on chess player (9)
Your prize is self-selected:
http://www.youtube.com/watch?v=BcAiwQotEos
and for those into gardening:
http://www.youtube.com/watch?v=CHgcumuFl0M
Thanks to all who participated.