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TsumegoFromGames9
TFG9PlayingHane

 

TFG9 - What the Finnish Dan Players Suggested
   

[Diagram]
Diag.: Suggested sequence


[Diagram]
Diag.: What next?

I have been looking at the suggestion but so far can not find a win for W here. What does W do after B 4? One important question that is open is whether W wins if everybody lives. DaveSigaty



[Diagram]
Diag.: At worst a ko 1 - 5?

Something like this ko (6 - 10)? See below. DaveSigaty


[Diagram]
Diag.: A. W's Brute Force Approach

W 7 at 3
B 10 at 4 and wins on the right with 'a', ignoring any ko threat


[Diagram]
Diag.: B1. W's play on the right

W 9 at 5

The ko threat at 10 and a second at 'a' are available in a lot of the variations and make it possible for B to fight hard. The position on the rest of the board would help to evaluate this situation correctly.


[Diagram]
Diag.: B2. W's play on the right - cont'd

W 5 at the marked W stone
B 8 at 2. Whenever W retakes the ko in the corner, B will recapture at the marked B stone and ignore any ko threat.


[Diagram]
Diag.: C. Other Alternatives for W from Here?


[Diagram]
Diag.: What next: Maybe here?

dnerra: Whew, that is really a tough challenge to the SL! Here are my 2c:

Maybe the idea of the "finnish sequence" is to create a damezumari as with W1 in this diagram. Note that the white dragon virtually has 5 liberties (I think). At the moment I would expect a result similar to Dave's above, but I have to read further.

Ok, just 48 more, and we have a $ :-)

AvatarDJFlux Since when a dollar is made of 50c??!?
Now I understand your counting!!!!! ;-)))) -- dnerra: Hmph. Let me say I meant 48 more 2c's, after Dave's and mine above :-)))

Dave: How about this B 2?

dnerra: Isn't W3 sufficient then? After W5, it's a just a liberty counting exercise :-) I think W is one liberty ahead, but maybe I am wrong.

Dieter: Well you are, no ?

dnerra: Ooops yes, I didn't see B5. So W has to play at 4 instead of W2, in case mutual life is sufficient?

go4joy: Isn't white still dead if W at 4, then black to the right of 4. Doesn't black still win the semeai?


[Diagram]
Diag.: What next: Maybe here?


[Diagram]
Diag.: Alternative?

go4joy: referring to Dave's third diagram


[Diagram]
Diag.: Alternative con't 1

[Diagram]
Diag.: Alternative con't 2

go4joy: This is the best I can come up with. White will need a big ko threat. At least this variation removes black local ko threats.

DaveSigaty: Unfortunately this variation has removed W's local ko threats (successive W plays at 'a' and 'b' will create only a temporary seki since the 3 W stones have no hope for eyes). Unless there is a 60+ point ko threat on the part of the board that is not shown, B will ignore any threat and live in the upper left. As a result, W 3 looks impossible.



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