Changes

* [https://github.com/flok99 flok99 folkertvanheusden folkertvanheusden (Folkert van Heusden) · GitHub] (as of November 2020, no longer available) <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=75904 Chess programs :: Source available, but not today?] by [[Günther Simon]], [[CCC]], November 23, 2020</ref>* [https://www.vanheusden.com/index_main.php www.vanheusden.com] (as of November 2020, no longer available)* [https://www.vanheusden.com/cchesschess/ www.vanheusden.com - Computer Chess] (as of November 2020, no longer available)* [https://www.vanheusden.com/cchess/datamining_on_chess.html Data-mining on the game of chess] (as of November 2020, no longer available)* [https://www.vanheusden.com/Embla/board/ Embla based chess computer] by [[Folkert van Heusden]] (as of November 2020, no longer available)