Edited by fmo, Aaachen, Germany, 3rd edition, 2002, in German language (+ in English: the preface -see photo 4). Hardback, 352 pp, 570 grams, condition: fine. 

Contents: see photo 3.

"A helpmate is a type of chess problem in which both sides cooperate in order to achieve the goal of checkmating Black. In a helpmate in n moves, Black moves first, then White, each side moving n times, to culminate in White's nth move checkmating Black. (In a helpmate in 2 for example, sometimes abbreviated h#2, the solution consists of a Black move, a White move, a second Black move, then a second White move, giving checkmate.) Although the two sides cooperate, all moves must be legal according to the rules of chess.

The first helpmate problem was by the German chess master Max Lange, published in Deutsche Schachzeitung, December 1854. In The Chess Monthly, November 1860, American puzzle inventor Sam Loyd published the first helpmate with Black to move as is now standard."