Games are always causal/unrated. I prefer 5+3 since these are unusual position that has never been played before. Just let me know which Chapter you are interested in, i ll send a challenge.
From Position Variants would be nice.
??? I play 10+11 and many others what is the difference?
I have added some new chapters (between chapters 31-43) and positions to the study:
lichess.org/study/0jzozhfVTwo examples:
