Blighted Stones Have Little Use
The marked stones have been blighted. The upper stone more so than the lower.
I was thinking, to find this move, one could Ignore the Blighted Stones
 And White cuts through ...
tderz ... which is big.
The corner is endangered.
To be cut through like this feels very bad.
Would there be a watari possible?
tderz: I would like to discuss some alternatives:
tderz: + are an often used tactique to give away the useless stones, but 4 stones will be cut off, which is still big.
Black cannot connect all by jumping to a.
tderz: could also test at a, which fails.
cannot connect herself and cut the black stones.
tderz: Can work?
tderz: Because, there is a liberty at a, this does not work for White.
tderz: White could retract.
tderz: Cut could be answered like this.
White cannot proceed.
a and b are miai, both ending with an atari (c).
tderz: This is about similar to above.
Black stays connected.
Conclusion: Both are unimportant, however one could try to save some more endgame points by connecting the rest underneath.
tderz: How to answer . If Black is careful, nothing special happens.
tderz: this costs nerves, but works after all.
tderz: After the exchange a-b, White has the same problem as above,
fighting liberty e is only approachable after the moves c-d.
tderz: Seeing all this, White could try resisting again like this, hoping for black a-b-c-d--white e.
If Black simply plays e, he should end up in the safe other variations.
tderz: =x and with White has a connection problem.
Locally this feels (to me) as the fairest sequence for both, it depends much on how you can end in sente.
TA?: So the conclusion is that the blighted stones are useful in defending here? Does the title deserve a more fitting example?
Bill: Maybe the example deserves a better title. If the title suggests sacrificing weak stones, then that is good. But it should not suggest not making what use of them you can. (Their best use may lie in throwing them away.)
The idea is to cut off something of the black stones, when Black eventually has to defend somehow the cutting point s.
The idea behind it is that Black might be tempted to exchange t for u in order to block 's escape route and living by then by v instead of s.
This exchange t for u affects the semeai on the left.
It is not difficult to decide with which one to start.
Losing as mochikomi is a big loss. Better to start with in .
tderz: More white stones are lost.
is not necessary right now, hence could start at a after .
tderz: Perhaps this is the point ...
tderz: If follows, to could follow
is not possible now, because
Black could play simply m or exchange t for u.
tderz: Having fun with a ko ?
tderz: Black could better play , like this.