Gilmoy: An elegant composition-like reversal of the <B stalemates N> endgame pattern (upper left).
click for larger viewN.B. (heh) "stalemates" implies (derives from) an intersection between opposing pieces' lines of force. That means it's symmetric: whoever moves first, loses. So really they stalemate each other. But we almost never see it as <N stalemates B>, because the B's longer range gives it more squares than an N can cover. Conversely, if the B is self-blocked by its own P (or K), then it's happy to just form the protected pair and offer a trade. We could compose a position where a B is self-blocked by its own N (above, lower right). Here, White constrains the B not by (self)blocking it, but by obligating it to see-a8. Then White's N + pawns control all of the reachable squares on the long diagonal. 
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