Karl Fabel (born October 20, 1905 in Hamburg; † March 3, 1975 in Pischertshofen) was a significant German chess composer and author of chess problem books.

Fabel studied law and chemistry and earned a doctorate in chemistry. He initially worked as a judge in the patent sector, later he was Senate President of the German Patent Office in Munich.

Chess composition
Fabel dealt with chess composition and composed around 1250 chess problems, including miniatures, retro problems and long-moving checkmates. Many of his problems were included in the FIDE albums. He was also interested in problems from the area of “chess and mathematics”. Fabel was not a tournament player.

He was involved as an official in the Schwalbe Association. FIDE appointed him International Arbiter of Chess Composition in 1964 and International Master of Chess Composition in 1967.

Factories
Fabel's publications often dealt with both chess problems and mathematical questions on the chessboard, such as the queen problem or knight migrations. How many moves can a chess game consist of at most, considering the 50-move rule? Some books also go into the areas of chess entertainment and curiosities and are part of the standard literature:

Cabaret, Franz Palatz, Wilhelm Massman, Karl Fabel, 1943, new edition 1963 with Werner Speckmann
On the edge of the chessboard, Karl Fabel, 1947
Some things about chess tasks, Karl Fabel, 1950
Around the chessboard - amusing and interesting things about chess, Karl Fabel, Walter De Gruyter & Co, Berlin, 1955
Curious Chess, Karl Fabel, Walter-Rau-Verlag, 1960
Chess and numbers - entertaining chess mathematics, Eero Bonsdorff, Karl Fabel, Olavi Riihimaa, Walter Rau Verlag, Düsseldorf 1966
Chess without Borders, C. E. Kemp, Karl Fabel, Walter Rau Verlag, Düsseldorf, 1969
Introduction to problem chess, Karl Fabel, Rudi Schmaus chess publisher, Heidelberg 1976
Web links
Tasks from Fabel on the PDB server
Fable chess
Individual evidence
  International referees for chess compositions
  International masters of chess compositions

Source; Germain Wikipedia

Others: On Website ARVES.org  7 endgame studies of Fabel are selected (Selected by Peter Siegfried Krug)