FEN: 8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w -
It's white to move. The problem is if you play pawn to d8, promoting to a queen, black would play knight to f7, with a royal forking, you'll lose your newly promoted queen.
You might think black is winning here, but what if I tell you white will win if play correctly, the secret is your bishop and the g-pawn.