Conrad Bayer has composed this mate in 9!

Dr. Julius Cesar Infantozzi has the honour of composing this puzzle. But it's great anyway.

Mate in 16.

Bumb

A well deserved bump. The first one I already know. The second one was new to me, and frankly I didn't try to solve it and just looked at the solution... It is truely amazing! 

very good. solved the second one without help but it took me a while.

very difficult