Chess: "Proof Games"

If you have any interest in chess, then Chess Cafe should be a regular stop. Today, chess problem-solver John Nunn offers eight variations on the traditional chess puzzle. These "proof games" present a board position and the number of moves that have been made, and then challenge you to figure out the moves that led to that position. It's a neat kind of problem, as you can see from the example below.

For all 8 puzzles, including Nunn's interesting commentary and the solutions, check out the Skittles Room at Chess Cafe.

Proof Game One
Tibor Orban, Die Schwalbe 1976
Position after Black's fourth move

Thanks to Wayne for sending this one in.