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a Danish chess player and programmer, endgame and early [[Endgame Tablebases|endgame tablebase]] researcher
with interests in maximals and [[Zugzwang#MutualZugzwang|mutual zugzwang]] <ref>[http://chess.jaet.org/cgi-bin/mzugs List of All Known Mutual Zugzwangs]</ref> <ref>[[Lars Rasmussen]] ('''1991 - 2000'''). ''Mutual Zugzwang Results''. (various) [https://en.wikipedia.org/wiki/EG_%28magazine%29 EG]</ref>.
Along with [[David Forthoffer]] and primary author [[Sito Dekker]], he contributed to the automated database generation program [[Retro]], considering both [[En passant|en passant]] and [[Castling|castling]] <ref>[[Eugene Nalimov]], [[Guy Haworth]], [[Ernst A. Heinz]] ('''2000'''). ''[http://centaur.reading.ac.uk/4562/ Space-Efficient Indexing of Chess Endgame Tables]''. [[ICGA Journal#23_3|ICGA Journal, Vol. 23, No. 3]]</ref>,
which revealed five discrepancies in KRKB <ref>[[David Forthoffer]], [[Lars Rasmussen]], [[Sito Dekker]] ('''1989'''). ''A Correction to some KRKB-Database Results''. [[ICGA Journal#12_1|ICCA Journal, Vol. 12, No. 1]]</ref>
from the numbers published by [[Jaap van den Herik]] and [[Bob Herschberg]], et al. <ref>[[Jaap van den Herik]], [[Bob Herschberg]], et al. ('''1988'''). ''Computer Checks on Human Analyses of the KRKB Endgame''. [[ICGA Journal#11_1|ICCA Journal, Vol. 11, No. 1]]</ref>.
