British Go Journal No. 63.  November 1984. Page 31.
Solution (p8) |
Black 1 is the only way to connect.
Solution (p15) ||
Black 1 in the left hand diagram doesn't work. This forms the "J" group, which is unstable and can be killed by white 2 - 8 (the order of 2 and 4 can be reversed). The way for Black to survive is to play black 1 in the right hand diagram, which becomes ko as shown.
Solution (p17) |
White 1 is a surprising move, but it is the only way to stop Black from playing A with eyes available on either side (white A fails to black 3).