White to Play  

The 3-3 invasion at a is doomed to die. W1 looks pretty urgent. After this W1, I actually prefer white's position to black's. -Warfreak2

Alex: Actually, all of the suggested moves a through d are too close to strong positions - either the player's own, or the opponents. a will die, b is jumping out to the centre with a group that already has half a dozen eyes and doesn't need to run anywhere, c is much too close to thickness (and is also aji keshi after Black responds at the circled point), and d is too overconcentrated to be honte, even though there is some aji there.

I'm not convinced that the suggested W1 is actually urgent, since White can easily capture either those two stones or the other one, and the corner is dead anyway - the only question is how easily Black can exploit the aji of pulling out the two stones and forcing white to capture the other one, in order to reduce the White moyo. It might be correct, but I'd be looking more at finding a point on the border between the White moyo and the Black one, while reducing the aji of those stones from a distance. Something like e, maybe.


What about one point below c? That seems like a fun time.

Alex: Trading d for e does seem like a better forcing exchange than c for the circle-marked point, but then what?

if Black moves out ...  

tderz: I agree with Alex on all points.
I just want to show that - in addition to Alex's remark that White can take either of the marked stones - the two marked white groups are always connected,
independent of ladders. (if Black a, White b)

W.r.t. a following W1, this one here could be interpreted as being on the borderline of two moyos (White's w and Black's s), thus s.th. one wants to play. The circle below would be meant to stirr up local trouble, usually the shown W1 would seem (IMO) to steer the game home with less surprises.

However, the two moyos (White's w and Black's s) seem comparable, whereas Black has two corners (ur & ll) in contrast to White's overconcentrated ponuki-group on the right. Hence, planting a White circle in Black's biggest territory/moyo for testing him (he will react) is good.
If, for example, Black descends to d (suggested by Alex), then I might leave circle as forcing move and still play W1 or jump to f and reduce (must watch, that this group won't be driven in White's moyo, thereby destroying it, whereby B would saveguard his two-corner territorial advantage)


Bill: I think that Black is quite comfortably ahead unless White takes emergency measures. W1 looks good for a probe, to get something out of the white+circle stones. Then if B2, how about W3?

PositionalJudgementProblem4/Discussion last edited by Bill on March 2, 2007 - 14:40
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Login / Prefs
Sensei's Library