"Beasley and Whitworth also comment that "It is quite easy to construct a position in which White must promote to a rook or bishop in order to "avoid" giving stalemate," but "It is much more difficult to create a position in which White must underpromote to "create" a stalemate," which is done on two occasions in this study.Rusinek subsequently (64, 27 July 1978) added an introduction to this study which added a promotion to queen to the already existing underpromotions, thus creating an Allumwandlung.