#264 Joaz Banbeck vs TegaiS

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Joaz Banbeck
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

emeraldemon wrote:Question for Joaz
Mind showing us the sequence you read? :study:


Sequence? Singular?

There is a whole bunch of them. I can barely handle six impossible things before breakfast, but not near that many after dinner. :lol:

Rather, I'll try to break it down into several little battlefields. I'll show how each of them work in isolation. I'll leave it to you observers to figure out how they interact. :twisted:

First, let us observe that the stone that I just played cannot be killed, nor can white connect under it. Most importantly, B9 by white is gote in all variations. Here are several general patterns:

Click Here To Show Diagram Code
[go]$$Wcm1 6 tenukis
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . 4 X X X X X . . . . . . X . . X . . |
$$ | 3 1 . . . O . . O . . . O X . O X . . |
$$ | . X 2 X X . X X O , . O . O O , . . . |
$$ | . 5 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . . . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Click Here To Show Diagram Code
[go]$$Wcm1 4 tenukis because the circled points are miai
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . C X X X X X . . . . . . X . . X . . |
$$ | . 1 . . . O . . O . . . O X . O X . . |
$$ | C X 2 X X . X X O , . O . O O , . . . |
$$ | . 3 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . . . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Click Here To Show Diagram Code
[go]$$Wcm1 2 tenukis because the circled points are miai
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . C . . . O . . O . . . O X . O X . . |
$$ | . X C X X . X X O , . O . O O , . . . |
$$ | . 1 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . . . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Click Here To Show Diagram Code
[go]$$Wcm1 6 tenukis
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . 4 X X X X X . . . . . . X . . X . . |
$$ | 3 1 . . . O . . O . . . O X . O X . . |
$$ | . X 2 X X . X X O , . O . O O , . . . |
$$ | . 5 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . . . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Next, let's look at the lower end of the group. This is a pattern that is probably familiar to all of us. It has no branches ( at least no reasonable ones for white that I can see ):

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . 1 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 5 O . . . . . . X . . . O . . O . . |
$$ | . 2 3 . . . . . . . . O . . . . . . . |
$$ | 6 O 4 X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]



Lastly, there is the issue of the lone black stone at D7.

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . . O O O O . . O . . . O . . X . . . |
$$ | . . . . 5 4 X X . . . . . . . . X . . |
$$ | . . O X 2 3 7 . . . . . . . . . . . . |
$$ | . . O . 1 6 8 . . X . . . O . . O . . |
$$ | . . . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

It can be saved in most variations.
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Joaz Banbeck wrote:...

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . 1 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 5 O . . . . . . X . . . O . . O . . |
$$ | . 2 3 . . . . . . . . O . . . . . . . |
$$ | 6 O 4 X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
...


This may be better for black:


Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . 1 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 4 O . . . . . . X . . . O . . O . . |
$$ | . 2 3 . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


BTW, this variation does not help white:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . 1 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O a . . . . . X . . . O . . O . . |
$$ | . 2 4 b . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

...because later black may run safely to 'a', connecting easily with the tiger's mouth at 'b'.
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Re: #264 Joaz Banbeck vs TegaiS

Post by TegaiS »

Here White can only make one eye in gote.
Click Here To Show Diagram Code
[go]$$Wcm1 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . B . X X . X X O , . O . O O , . . . |
$$ | . 2 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . 1 . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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Re: #264 Joaz Banbeck vs TegaiS

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Click Here To Show Diagram Code
[go]$$Bcm81 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . 1 . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . 9 . X X . X X O , . O . O O , . . . |
$$ | . 0 O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . . . . . . . . . . . 8 . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . 3 X . . . . . 7 X . 2 . X . . . . . |
$$ | . . . . . . . . 5 4 6 . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Couldn't find nothing better.
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . 1 . . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]



White's latest move is probably the best. It seems to get the most room for eyes. But by my reading it is not quite enough.
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Re: #264 Joaz Banbeck vs TegaiS

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Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . X . . . O . . O . . |
$$ | . 1 2 . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . X . . . O . . O . . |
$$ | . 1 2 . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

His move starts to trap my D7 stone. I'll sacrifice it if he wishes to kill it, but in return he will have to let me slide under into his eye space.

He can kill it now with one move, but while he does so, I can attempt to rescue it and turn it into a false eye. He then gets one eye along the side.

If he takes two moves to capture it, he can turn it into a real eye, but with my intervening two moves I can slide into his eye space along the side.

There is also one other line in which he captures D7 AND blocks my invaders underneath
but I play D8 - and in some lines C8 - leaving him with one big eye.

I don't have time to edit and post diagrams, but I can say with 99% certainty that this white group is dead.
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User avatar
Joaz Banbeck
Judan
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

@ Observers:
I almost went for this line. It seems more solid than the line that I played.

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 4 O . . . . . . X . . . O . . O . . |
$$ | . 1 2 . . . . . . . . O . . . . . . . |
$$ | 5 O 3 X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


But white lives with ko. :o :o :o

I assumed that he would continue with the vital point at B8, and that I would prevent the second eye with D8:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . 1 . 2 . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . O O . . . . . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

White can try a net, but it doesn't work:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . 1 . 2 7 6 X X . . . . . . . . X . . |
$$ | . . O X 4 5 9 . . . . . . . . . . . . |
$$ | . O O . 3 8 0 . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

...because one of the netting stones gets laddered first.

Therefore white dies, right? It looks like he does. ( A9 and A7 are miai )

However, if D8 is good for me, then according to the proverb, it should be good for him.
I was idly looking at it, assuming that I would kill easily if I got the vital point at B8.

Click Here To Show Diagram Code
[go]$$Wcm1 Got vital point, time to celebrate
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . 2 . 1 . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . O O . . . . . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

But white has this sequence:

First, he plays A10, threatening to either kill B10 for an eye, or connect underneath to his stone at B13. I have to reply.

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . 2 . . . O . . O . . . O X . O X . . |
$$ | 1 X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . X . O . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . O O . . . . . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

There are more complicated replies than this, but they all end in sente for white, and they all prevent the black connection underneath at A9.

Next, white attempts to capture the D7 stone:

Again, the net does not work:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . X . . . O . . O . . . O X . O X . . |
$$ | O X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . X . O 5 4 X X . . . . . . . . X . . |
$$ | . . O B 2 3 . . . . . . . . . . . . . |
$$ | . O O 7 1 6 . . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

White does capture the stones, but black throws in like this:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . X . . . O . . O . . . O X . O X . . |
$$ | O X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . X . O O X X X . . . . . . . . X . . |
$$ | . . O . 1 O . . . . . . . . . . . . . |
$$ | . O O O O X . . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

...and white does not get his second eye.

So white tries laddering the D7 stone.
The ladder does not capture either:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . X . . . O . . O . . . O X . O X . . |
$$ | O X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . X . O . . X X . . . . . . . . X . . |
$$ | . . O B 1 . . . . . . . . . . . . . . |
$$ | . O O 2 4 5 . . . X . . . O . . O . . |
$$ | . X O 3 6 . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


However, while playing a failed ladder, white has enclosed just enough space on the back side of the ladder, and finishes with a second eye like this:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . X . . . O . . O . . . O X . O X . . |
$$ | O X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . X . O . W X X . . . . . . . . X . . |
$$ | . . O X O . . . . . . . . . . . . . . |
$$ | . O O X X O . . . X . . . O . . O . . |
$$ | . X O O X . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


It now gets more complicated. Black has the mouse-stealing-oil tesuji. :D

The failed ladder has two side effects. It gets white his second eye, but it shorts white on crucial liberties and endangers his first eye. So black attempts to rescue his vital point stone, white blocks, and black completes the tesuji:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . X . . . O . . O . . . O X . O X . . |
$$ | O X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . X 3 O . O X X . . . . . . . . X . . |
$$ | 1 . O X O . . . . . . . . . . . . . . |
$$ | 2 O O X X O . . . X . . . O . . O . . |
$$ | . X O O X . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

White then starts a ko for life:

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . X . . . O . . O . . . O X . O X . . |
$$ | O X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | 1 X X O . O X X . . . . . . . . X . . |
$$ | X . O X O . . . . . . . . . . . . . . |
$$ | O O O X X O . . . X . . . O . . O . . |
$$ | . X O O X . . . . . . O . . . . . . . |
$$ | X . X X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

If I can find this ko, my opponent can find it also.

So at move 93 I have to play B6 instead.

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . X . . . O . . O . . |
$$ | . X O . . . . . . . . O . . . . . . . |
$$ | . O . X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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TegaiS
Lives with ko
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Re: #264 Joaz Banbeck vs TegaiS

Post by TegaiS »

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . X . . . O . . O . . |
$$ | . 1 2 . . . . . . . . O . . . . . . . |
$$ | . O 4 X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


In advance I thought that this gives me more chances than C4 or A4 but may be I was wrong.

I think I made a mistake in English in my previous comment. It should probably be "Couldn't find anything better" not "nothing better".
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User avatar
Joaz Banbeck
Judan
Posts: 5546
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Has thanked: 1080 times
Been thanked: 1434 times

Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . X . . . O . . O . . |
$$ | . 1 2 . . . . . . . . O . . . . . . . |
$$ | 5 O 4 X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Forced, of course.
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TegaiS
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Re: #264 Joaz Banbeck vs TegaiS

Post by TegaiS »

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . X . . . O . . O . . |
$$ | 6 1 2 . . . . . . . . O . . . . . . . |
$$ | 5 O 4 X . X . . . , . . . . . O . . . |
$$ | . X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


After this White have several options to complicate things.
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | 4 2 O X . . . . . . . . . . . . . . . |
$$ | 1 X O . . . . . . X . . . O . . O . . |
$$ | 5 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | 3 X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


The first is like this. Numbers to mark stones finished earlier than the variation so it leaves some hope.
Click Here To Show Diagram Code
[go]$$Wcm1 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . 4 6 X X . . . . . . . . X . . |
$$ | O O O X 1 5 . . . . . . . . . . . . . |
$$ | X X O 3 2 8 0 . . X . . . O . . O . . |
$$ | X X O . 7 9 . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X Q . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


The second.
Click Here To Show Diagram Code
[go]$$Wcm1 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . 6 4 X X . . . . . . . . X . . |
$$ | O O O X 2 3 . . . . . . . . . . . . . |
$$ | X X O . 1 . . . . X . . . O . . O . . |
$$ | X X O . . 5 . . . . . O . . . . . . . |
$$ | X O O X 8 X 7 . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


The third has the same idea as the first.
Click Here To Show Diagram Code
[go]$$Wcm1 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . 8 4 6 X X . . . . . . . . X . . |
$$ | O O O X 3 5 . . . . . . . . . . . . . |
$$ | X X O . 2 1 . . . X . . . O . . O . . |
$$ | X X O . 7 . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X 9 . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
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Joaz Banbeck
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . 3 O . . . . . . X . . . O . . O . . |
$$ | 6 1 2 . . . . . . . . O . . . . . . . |
$$ | 5 O 4 X . X . . . , . . . . . O . . . |
$$ | 7 X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Trigger:
Click Here To Show Diagram Code
[go]$$Bcm91 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | . 8 O X . . . . . . . . . . . . . . . |
$$ | 9 3 O . . . . . . X . . . O . . O . . |
$$ | 6 1 2 . . . . . . . . O . . . . . . . |
$$ | 5 O 4 X . X . . . , . . . . . O . . . |
$$ | 7 X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Second trigger:
Click Here To Show Diagram Code
[go]$$Bcm99 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | 2 O O X . . . . . . . . . . . . . . . |
$$ | X X O . . . . . . X . . . O . . O . . |
$$ | 3 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

If he accepts the triggers, white creates one eye at B8. ( The circled points are miai )
He might not do them immediately, but he has to sooner or later. If I get A7, that destroys the westward miai pair, then in some variations D8 by me threatens to make one big eye with D7. So I suspect that he will accept the triggers.

Click Here To Show Diagram Code
[go]$$Bcm99 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | C O O O O O . . O . . . O . . X . . . |
$$ | C . C C . . X X . . . . . . . . X . . |
$$ | O O O X . . . . . . . . . . . . . . . |
$$ | X X O . . . . . . X . . . O . . O . . |
$$ | X X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Once he has one eye secured, the focus switches to the second one. He has to make it in the middle of the board.

If he cuts at 1, I have to respond with 2, otherwise he kills my lower left group.

Click Here To Show Diagram Code
[go]$$Wcm1 Can white get the second eye in this position?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | O O O X . . . . . . . . . . . . . . . |
$$ | X X O . . . . . . X . . . O . . O . . |
$$ | X X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X 1 . . . . X X . O . X . . . . . |
$$ | . . . 2 . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I think that I can kill. At least, in all variations that I have looked at, I can. ( Although some liberties races that I have read are in my favor by only one move. )

We have managed to get ourselves into a game-deciding fight here. If he dies, I have a 60+ point corner, giving me a winning advantage. If he lives, much of my lower side territory is compromised, giving him a similar advantage.

I expect that one of us resigns within 15 moves.


There is one compromise possible. He could concede the left side group and play the invasion of 1 below, and if I tried to trap it, it would be just enough to tip the fight in his favor. So I'd have to let him have a successful invasion.

Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | O O O X . . . . 3 . . . . . . . . . . |
$$ | X X O . . 2 . 1 . X . . . O . . O . . |
$$ | X X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

I don't think that we will see this. Based upon my opponent's current play, compromise does not seem to be his style.
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Re: #264 Joaz Banbeck vs TegaiS

Post by TegaiS »

Click Here To Show Diagram Code
[go]$$Bcm99 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | 2 O O X . . . . . . . . . . . . . . . |
$$ | X X O . . 4 . . . X . . . O . . O . . |
$$ | 3 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I decided that I like the last variation the most.
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Joaz Banbeck
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Click Here To Show Diagram Code
[go]$$Bcm101 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | O O O X . . . . . . . . . . . . . . . |
$$ | X X O . 3 2 . . . X . . . O . . O . . |
$$ | 1 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


He chooses the most complicated version. :clap: My groups will be hanging on by their fingernails.
I hope nobody slips. There is no room for error here.
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Joaz Banbeck
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Re: #264 Joaz Banbeck vs TegaiS

Post by Joaz Banbeck »

Again, I almost stumbled into disaster.

He has one eye, and if he gets another, his group lives and he wins the game.
I can't let him capture D7 and make an eye there.

The natural move to play is this. It seems to be the most direct method of connecting D7 out:

Click Here To Show Diagram Code
[go]$$Bcm101 Prisoners: :b3:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | O O O B . 3 . . . . . . . . . . . . . |
$$ | X X O . . 2 . . . X . . . O . . O . . |
$$ | 1 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

But it doesn't work.

White plays like this:

Click Here To Show Diagram Code
[go]$$Bcm101
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . . . X X . . . . . . . . X . . |
$$ | O O O X 4 3 . . . . . . . . . . . . . |
$$ | X X O . . 2 . . . X . . . O . . O . . |
$$ | 1 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I can't play 5 above, or he gets the second eye:

Click Here To Show Diagram Code
[go]$$Bcm101 The circled points are miai
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . C 5 C X X . . . . . . . . X . . |
$$ | O O O X 4 3 . . . . . . . . . . . . . |
$$ | X X O . 6 2 . . . X . . . O . . O . . |
$$ | 1 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

So I must atari with 5 from below. He connects with 6, and I must connect with 7:

Click Here To Show Diagram Code
[go]$$Bcm101
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . 6 . X X . . . . . . . . X . . |
$$ | O O O X 4 3 . . . . . . . . . . . . . |
$$ | X X O 7 5 2 . . . X . . . O . . O . . |
$$ | 1 X O . . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X . . . . . X X . O . X . . . . . |
$$ | . . . . . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

All of that is simple and forced. I must play it or he gets an eye at D7.

Next, white cuts at 8:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . 6 . X X . . . . . . . . X . . |
$$ | O O O X 4 3 . . . . . . . . . . . . . |
$$ | X X O 7 5 2 . . . X . . . O . . O . . |
$$ | 1 X O 0 . . . . . . . O . . . . . . . |
$$ | X O O X . X . . . , . . . . . O . . . |
$$ | X X X 8 . . . . X X . O . X . . . . . |
$$ | . . . 9 . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

I can't let him play 9 or he will kill my corner.

Now with 10 he threatens both my single stone and my group of three. I must rescue the three, or he makes an eye there.
[ The really sharp-eyed observer may note that a different play here leads to a ko, but that isn't much of an improvement for me since he has a bunch of internal ko threats. ]

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . O . X X . . . . . . . . X . . |
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 . . . . . . O . . . . . . . |
$$ | X O O X 2 X . . . , . . . . . O . . . |
$$ | X X X O . . . . X X . O . X . . . . . |
$$ | . . . X . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

He captures my single stone. It is a false eye, of course, so I'm still in the game.

I play 3 which will gain some leverage in the future. ( More on that later ) His reply at 4 is forced. Then I save my three stones with 5. He still only has one eye.

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . O . X X . . . . . . . . X . . |
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 5 . . . . . O . . . . . . . |
$$ | X O O 4 2 X . . . , . . . . . O . . . |
$$ | X X X O 3 . . . X X . O . X . . . . . |
$$ | . . . X . . . . X O O . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Then he cuts off my corner with 6:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . O . X X . . . . . . . . X . . |
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 5 . . . . . O . . . . . . . |
$$ | X O O 4 2 X . . . , . . . . . O . . . |
$$ | X X X O 3 . . . X X . O . X . . . . . |
$$ | . . 7 X 6 . . . X O O . . . . O . . . |
$$ | . C . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

I could play 7 at C1 or D1. It does not get any better. My corner is cut off and still needs another move to have two eyes.

Note that if I had not sacrificed at 3, he could now play 8 at B1, killing my corner.

Click Here To Show Diagram Code
[go]$$Bcm1
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 5 . . . . . O . . . . . . . |
$$ | X O O . 2 X . . . , . . . . . O . . . |
$$ | X X X O . . . . X X . O . X . . . . . |
$$ | . . 7 X 6 . . . X O O . . . . O . . . |
$$ | . 8 . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

But with 3 in place, he can't:

Click Here To Show Diagram Code
[go]$$Bcm1 Black kills white 6 to save his corner
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 5 . . . . . O . . . . . . . |
$$ | X O O 4 2 X . . . , . . . . . O . . . |
$$ | X X X O 3 9 . . X X . O . X . . . . . |
$$ | . . 7 X 6 . . . X O O . . . . O . . . |
$$ | . 8 . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

So white has to pause to capture black 3 with 8, and black gets another move to save his corner:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . O . X X . . . . . . . . X . . |
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 5 . . . . . O . . . . . . . |
$$ | X O O 4 2 X . . . , . . . . . O . . . |
$$ | X X X O C 8 . . X X . O . X . . . . . |
$$ | . . 7 X 6 . . . X O O . . . . O . . . |
$$ | . 9 . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Having reached the edge of the board, white tries to use it to make an eye:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . O . X X . . . . . . . . X . . |
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O 1 5 . . . . . O . . . . . . . |
$$ | X O O 4 2 X . . . , . . . . . O . . . |
$$ | X X X O C 8 . . X X . O . X . . . . . |
$$ | . . 7 X 6 . 0 . X O O . . . . O . . . |
$$ | . 9 . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Normally, black could prevent an eye here:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . O . X . . O . . . . X . O . . |
$$ | . O . O . . . . X O . X . . . , X O . |
$$ | . . O O X X . . X O . . . . X . X . . |
$$ | . O . . O X . . . . O . O . . . . . . |
$$ | . X O O O X . O O . . . . . . . . . . |
$$ | . . X X X X X . . . . . . X . . X . . |
$$ | . . . . . O . . O . . . O X . O X . . |
$$ | . X . X X . X X O , . O . O O , . . . |
$$ | . O O O O O . . O . . . O . . X . . . |
$$ | . . . . O . X X . . . . . . . . X . . |
$$ | O O O X O X . . . . . . . . . . . . . |
$$ | X X O X X O . . . X . . . O . . O . . |
$$ | X X O O X X . . . . . O . . . . . . . |
$$ | X O O . O X . . . , . . . . . O . . . |
$$ | X X X O . O . . X X . O . X . . . . . |
$$ | . . X X O . O . X O O . . . . O . . . |
$$ | . X . . 4 1 2 . 3 . . . . . . . . . . |
$$ ---------------------------------------[/go]

But 2 threatens to connect underneath, so white gets the second eye - and the game.
Help make L19 more organized. Make an index: https://lifein19x19.com/viewtopic.php?f=14&t=5207
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