If two chessplayers cooperate, how quickly can they reach a stalemate without any captures? Working independently, Sam Loyd, E.N. Frankenstein, W.H. Thompson, and Henry Dudeney all produced the same position, which can be reached in 12 moves:

1. d4 e5 2. Qd3 Qh4 3. Qg3 Bb4+ 4. Nd2 a5 5. a4 d6 6. h3 Be6 7. Ra3 f5 8. Qh2 c5 9. Rg3 Bb3 10. c4 f4 11. f3 e4 12. d5 e3