The question leads to a paradoxal thinkingprocess.
The unexpectedly dangerous piece?

which means that anyone participating has a 25 % chance to be teleported back to the sixties. Paradoxical thinking processes: more dangerous than you'd assume.

Man I would love to go back to the sixties. It's one off the places I have never been.
o.k. I will participate then.
If its ok with the topicstarter I will rephrase the question to
"Which piece, do you think, causes the most unexpected upsets in chess?" I think this is what you are aiming for.
If this indeed is your question, then it must be the Knight. With its ever feared forks, and strange movepattern.
Personal I prefer the pawn, with its underpromotion.

I think underpromoting a pawn. I had one game where my friend was ready to take my pawn with a bishop as soon as I turned it to a queen, but I changed it to a knight instead and he ignored it. That knight then forked his king and his rook.
>>Renegade

Man I would love to go back to the sixties. It's one off the places I have never been.
o.k. I will participate then.
If its ok with the topicstarter I will rephrase the question to
"Which piece, do you think, causes the most unexpected upsets in chess?" I think this is what you are aiming for.
If this indeed is your question, then it must be the Knight. With its ever feared forks, and strange movepattern.
Personal I prefer the pawn, with its underpromotion.
Nice comment and intresting one at that,i am afraid the question is clear.howe ver i appreciate the your choice of words. in re phrasing the question.looks like the knight though, but we learn everyday someone may have a different opinion,thats why the question arose in the first place.but i dont think the pawn will be unexpectedly dangerous in that case,reason being that every one knows there will be a promotion on arival.but the knight can strike before you say Jack!cheers.

I think underpromoting a pawn. I had one game where my friend was ready to take my pawn with a bishop as soon as I turned it to a queen, but I changed it to a knight instead and he ignored it. That knight then forked his king and his rook.
>>Renegade
intresting these are the kind of experiences i am talking about.thums up man.
which piece will you consider the UXPECTEDLY DANGEROUS.