I did not know Christian Schulte had passed away! That is sad news that reaches me now five years on from his passing.

https://intra.kth.se/en/eecs/nyheter/in-memory-of-christian-...

I met Christian at a conference in Lund back in 2005 as I was doing my master thesis within the constraint programming area. He came across as both very knowledgeable and very kind and caring. RIP Christian.