Allumwandlung, also known as complete promotion or AUW in German, is a chess problem motif that involves the transformation of a pawn, or multiple pawns, into different pieces such as a queen, rook, bishop, or knight during the course of the solution. The central objective of Allumwandlung is the promotion of a white or black pawn that would include all types of the underpromotion.
The circumstances surrounding this pattern are highly specific and constrained by numerous conditions, making it exceptionally rare to encounter in an actual game. Nevertheless, as a unique chess composition, it presents an intriguing problem that holds great appeal for those seeking a challenge.
Have a look at the chess problem composed by Niels Høeg, and published in 1905. The underpromotions to a rook, bishop, or knight are crucial, as a standard promotion to a queen would cause a stalemate in numerous instances:
In addition to that, there exists a highly intricate variation of Allumwandlung known as the Babson task. However, delving into the intricacies of the Babson task would be more suitable for future articles.