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a German computer scientist and software engineer, M.Sc. in computer science from [https://en.wikipedia.org/wiki/Technical_University_of_Berlin Technical University of Berlin] in 1986, and author of [[Chest]], a Program for Solving Orthodox [[Chess Problems, Compositions and Studies|Chess Problems]] <ref>[http://turbotm.de/~heiner/Chess/chest.html Chest: A Program for Solving Orthodox Chess Problems]</ref>.
Heiner is a well known [https://en.wikipedia.org/wiki/Busy_beaver Busy Beaver] expert <ref>[http://turbotm.de/~heiner/BB/index.html Heiner Marxen - Busy Beaver]</ref>.
Additionally he introduced a method to compute [https://en.wikipedia.org/wiki/Rook%27s_graph Rook Paths Puzzles] <ref>[http://www.iwriteiam.nl/Crook_path.html Rook Paths Puzzles] </ref> <ref>[http://turbotm.de/~heiner/Rookpath/method.html Heiner Marxen's Method to compute the Rook Paths Puzzle]</ref>.
In 1973, he has written the first precursor of Chest in [[Fortran|Fortran-II]] (no [[Recursion|recursion]]) to solve [https://en.wikipedia.org/wiki/Chess_problem#Types_of_problem mate-in-two problems] <ref>[http://turbotm.de/~heiner/Chess/chest.html CHEST: A Program for Solving Orthodox Chess Problems]</ref>.
It did not need or use any tapes and ran on an [https://en.wikipedia.org/wiki/IBM_1130 IBM-1130] with 32 K bytes, and took half an hour for one job <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=41373&start=5 Re: Perft(3) from 1978, with a twist!] by [[Heiner Marxen]], [[CCC]], December 09, 2011</ref>.
<ref>[https://dblp.org/pid/02/4081.html dblp: Heiner Marxen]</ref>
* [[Heiner Marxen]], Jürgen Buntrock ('''1990'''). ''[http://turbotm.de/~heiner/BB/mabu90.html Attacking the Busy Beaver 5]''. [https://en.wikipedia.org/wiki/European_Association_for_Theoretical_Computer_Science#EATCS_Bulletin Bulletin of the EATCS], Vol. 40
* Roland Mueller, H.D. Doll, I.J. Donasch, [[Heiner Marxen]], H. [[Holger Pause ]] ('''1991'''). ''[https://ieeexplore.ieee.org/document/164617 A new man-machine-interface at BESSY]''. [[IEEE|IEEE]] Conference on Particle Accelerator <ref>[https://en.wikipedia.org/wiki/BESSY BESSY from Wikipedia]</ref>
=Forum Posts=
