Most of these variants do not even seem to satisfy the rules you laid out... A 'tunnel' definitely changes how the pieces move. As does bouncing from the edges.
Anyway, at least @togepi2468 created a variant. No one else did.
That's because your rules specified that you have to use standard pieces (no special moves) and a starting position setup which means the only viable variant is normal chess with different starting positions. So basically togepi didn't follow the rules.
Most of these variants do not even seem to satisfy the rules you laid out... A 'tunnel' definitely changes how the pieces move. As does bouncing from the edges.
Anyway, at least @togepi2468 created a variant. No one else did.
I created a variant!
I am talking about round 2.