CR step 4. eye-space-number /baduk/

There is 3-eye-space-group.
White can remove it just 3 sequences "include A."
There calls "3" "eye-space-NUMBER" in this blog.

Because it doesn't count white B and black C.

What about 4-eye-space-group?

White A and black B doesn't count. 3-eye-space-group left. So, 2 + 3 = 5.
Eye-space are 4, but eye-space-number is 5.
It's very important. Let me explain last below.

Now, 5-eye-space-group.

At the same reason, white A and black B doesn't count. 4-eye-space-group left. So, 3 + 5 = 8.

Last, 6-eye-space-group.

Yes, eye-space-number is 4 + 8 = 12.

You must remember this result for speed.

three three, four five, five eight, six twelve.
three three, four five, five eight, six twelve.
three three, four five, five eight, six twelve.
three three, four five, five eight, six twelve.
three three, four five, five eight, six twelve.

1-eye-space-group, 2-eye-space-group, 3-eye-space-group : eye-space is equal to eye-space-number.
But,
4-eye-space-group, 5-eye-space-group, 6-eye-space-group :eye-space is NOT equal to eye-space-number.



These differences are related to below.

1-eye-space v.s 2-eye-space : small-eye-space v.s small-eye-space
1-eye-space v.s 3-eye-space : small-eye-space v.s small-eye-space

3-eye-space v.s 4-eye-space : small-eye-space v.s big-eye-space
3-eye-space v.s 5-eye-space : small-eye-space v.s big-eye-space
3-eye-space v.s 6-eye-space : small-eye-space v.s big-eye-space
4-eye-space v.s 5-eye-space : small-eye-space v.s big-eye-space
4-eye-space v.s 6-eye-space : small-eye-space v.s big-eye-space
5-eye-space v.s 6-eye-space : small-eye-space v.s big-eye-space

p.s If there is not in-space, it is meaningless.

It's not end of it yet.