Changes

initially based on [[GreKo|GreKo 2018.01]] and following independent development since 2018. In August 2020, Igel switched to [[NNUE]] as a main evaluation function using [[Dietrich Kappe|Dietrich Kappe's]] ''Night Nurse'' net <ref>[http://talkchess.com/forum3/viewtopic.php?t=74619 Night Nurse is Bad Gyal in disguise] by [[Dietrich Kappe]], [[CCC]], July 30, 2020</ref> <ref>[http://talkchess.com/forum3/viewtopic.php?f=2&t=74837 Night Nurse 0.2] by [[Dietrich Kappe]], [[CCC]], August 19, 2020</ref> as default <ref>[http://talkchess.com/forum3/viewtopic.php?f=2&t=67890&start=17 Re: Introducing Igel chess engine - Igel and NNUE] by [[Volodymyr Shcherbyna]], [[CCC]], August 19, 2020</ref> participating in [[TCEC Season 19#Second|TCEC Season 19, League 2]], and promoting to [[TCEC Season 19#First|League 1]]. In October 2020 Igel switched to own network trained on Igel 2.6.0 (Hand Crafted Evaluation) participating in TCEC Cup7in TCEC Season 20.