PaulW: This page is for playing with the diagram making capabilities of SL.
(I suppose you could do this anywhere in SL - especially in the sand box - but this way all these experimental diagrams can be collected in one place without littering up other pages.)
Rafael: This last diagram is just to test what happens when you don't insert a "edge line", that is, a line with several dashes.
With no suicide, Black is unconditionally safe. However, Black can't make two eyes.
To be added to Benson's Algorithm as soon linear boards become first-class citizens in SL . . .