Found while looking for something else...

In chess, a helpmate is a chess problem in which both sides cooperate in achieving the goal of checkmating Black. A duplex helpmate is a helpmate with two solutions (one where Black moves first and helps White mate Black, and the second, where White moves first and helps Black mate White).

I was digging around one of the bottom shelves in my office and ran across a folder of old papers, and among them was a duplex helpmate in two moves—a poor thing, but mine own—that I had devised back in college. This is the position:



( Solutions under the cut... )

Cheers...

( Notes on why the position is deficient... )