KöKo: A move is possible only if the piece moved arrives on a square next to another unit.
Neutral piece: Belongs to whichever side chooses to use it. It can therefore be moved or captured by White or Black, and in Circe it is reborn according to capture. A King may not be moved onto a square controlled by a neutral piece, because of self-check.
No.1367Sergej Smotrov Kazakhstan original – 30.12.2018
No.1367
Surprisingly, WinChloe does not contain any other Köko problem with this material. Is the final selfmate combination new?
See this too! https://juliasfairies.com/problems/jf-1017-0318/no-1285/