Well, the applet doesn't seem to work so... lemme try this. takes
(any alternative?),
threatens the whole group, so
has to connect at
, and
finishes it off? Have I missed something here?
and
capture four white stones (including
). Interestingly the eye space of the White group at the top is not enough to make two eyes. If White a then Black b (bulky five), if White c then Black b (Pyramid Four).
Jasonred- ah, I stopped thinking once I saw Black's entire structure there die... I was also wondering about the whole title for this page! (why it's about eye spaces) but ... I was wondering about this following sequence? After , are a and b miai for life?
unkx80: No. Check out nakade. Also check out some of the Beginner Exercises.
Note: White dies in gote after . That is to say, after
, Black can play tenuki and White is still dead.
Jasonred: Let me try this, for Black to kill White... is this the correct sequence? Is in the diagram (Solution) a nakadeafter which White should just play tenuki?
Dieter: The point is, White is dead. In order to prove/disprove that, we have to verify what happens if White goes first, not Black.
For instance: then
makes miai of a and b: White needs both a and b to live, so Black can always play one of them to kill. Verify there is no eye in the corner.
Jasonred- verify this for me, but, ummm... modifying the above, I think I got a nakade for a 17-space eye... is this correct?
jvt: This eye space cannot possibly result from a capture. If such eye spaces are allowed, it is easy to add cutting points and stones in atari.