This is my attempt. (All of the stones must be solidly connected, else pieces can be cut off given infinite white moves.) -- Blake
Blake's 27 stones solution does not work: If white gets arbitrarily many free moves, she can form a living group. -- Pyramids
This is my best attempt. -- Pyramids
How about something like this:
LukeNine45: Not an improvement, but it looks nicer! :)
2 eyes just weren't enough :-) --Bass
An "obvious" enhancement. --Bass
Yes, the shape you used is indeed vastly better. Here's my go at it. --Bass
ferdi: The following try isn't in the running because changing the conditions doesn't count as solution ;-)
If you allow positions where every stone in the group is necessary and the group cannot be reinforced further, but you omit the infinite white moves rule, then seki is possible:
(Most 2-group sekis do not fulfill this requirement, because one or more stones could be removed and they would still be seki.)
I fail to see the necessity of, say, the marked stones. Dieter
In above diagram marked black stone is taken way. White can now capture some black stones...
Dieter: Yes, very deceptive ...