Problem: reconstruct the game In the following position, each side has made exactly 4 moves (8 in total).

[fen "rnbqkbnr/pp3ppp/2p1p3/8/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1"]


I need to find what these moves were.
Dag Oskar Madsen's (quite generous) hint:


  The last move was king takes e-eight.


And here's the full solution:


  Pawn to e-four, pawn to e-six, bishop to b-five, king to e-seven, bishop takes d-seven, pawn to c-six, bishop to e-eight, king takes e-eight.


rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

1. e4 e6 2. Bb5 Ke7 3. Bxd7 c6 4. Be8 Kxe8