ChessBase Christmas Puzzle

 

The game starts from the initial position. White and Black execute five moves each. Then, on move six, White moves a pawn from the square g7 to f8, capturing a black piece that is located there, promoting to a knight and delivering mate in the process..

The moves must all be legal, no side may ignore a check. Naturally White does not force the move sequence – both sides cooperate to achieve the goal.

So this is what the game notation looks like:

1. White move – black move
2. White move – black move
3. White move – black move
4. White move – black move
5. White move – black move
6. White plays pawn g7xf8 = knight, checkmate.