There's a fairly popular alternate version of chess called Antichess, or Losing Chess, or about seventeen other names. In this variation, the pieces move as usual, but the rules are slightly altered.
- A player wins when they are stalemated or have no pieces remaining on the board.
- The King acts like a normal piece and can be captured.
- If a player can capture a piece on their move, they must. They can choose between two different pieces that they can capture (so a rook on a1 can choose to either capture a piece on a2 or a piece on b1.
All of this being said...
Black to move and win on white's 16th move (with best play).
Note: the no-computers tag is to prevent people from just plugging it into a computer that has an Antichess option.