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Post #41 Posted: Mon Nov 27, 2017 6:11 pm 
Judan
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Hi Josh,

Re: :b18:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------------
$$ | . . . . . . . . . . .
$$ | . . . . . . O . . . .
$$ | . . . X O O X . O . .
$$ | . . . X X X . . . , .
$$ | . . . . . . . . . . .[/go]

Notice B has this sequence:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------------
$$ | . . . 8 . 4 . . . . .
$$ | . . 7 6 2 1 O 3 . . .
$$ | . . . X O O X 5 O . .
$$ | . . . X X X . . . , .
$$ | . . . . . . . . . . .[/go]
Whether it's good for B, or when to play it -- that's another issue.

:w51: I feel it's already worth this game to review how B got this result.
( After :b12: . )

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 Post subject: Re: JG journal and family rivalry games
Post #42 Posted: Tue Nov 28, 2017 4:16 pm 
Tengen

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NB above sequence is normally good for black, so white may sacrifice and take sente:

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

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Post #43 Posted: Sat Dec 02, 2017 7:25 pm 
Dies in gote

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Some tournament games from the handicap division of the Boston Open today.
First, Jin's Games. The first and fourth are only as much as he could remember from the start of the games:

Game 1, Jin was white, lost. In post-game review, we discussed continuations on the left side invasion (instead of his tenuki for move 30).


Game 2 (complete SGF)


Game 3 (complete SGF)


Game 4 (partial)
White won comfortably, but that was partially the result of black making a mistake that cost a big group which could have lived in seki (not shown in this sgf).

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Post #44 Posted: Sat Dec 02, 2017 7:33 pm 
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Jate's games. The first one we recorded 60 moves on paper, but he and his opponent had a pretty thorough review of the rest of the game, with commentary from a 4d who was helping with the tournament.

Game 2 (Jate won)


Game 3 (Jate lost; not sure if this includes the losing moves toward the end where a blunder cost a group in the corner):


Game 4 (Jate won):

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 Post subject: Re: JG journal and family rivalry games
Post #45 Posted: Mon Dec 11, 2017 9:27 am 
Dies in gote

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Game from this weekend, part of the AGHS young lions tournament.
I would be curious to hear feedback about how you respond to such an aggressive opponent.
FWIW, the two players are friends who met at the AGA youth summer camp this July, but they haven't played each other since then.



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Post #46 Posted: Mon Dec 11, 2017 1:10 pm 
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When your opponent is this aggressive, look for opportunities to punish overplays, but make sure your own positions are strong. In this game, W was stronger at fighting. Here are a few places B could have thwarted W.

:b15: leaves a cutting stone at Q15. If you are sure you can handle the fight, then it might be OK to invite W to run with this stone. But why not simply capture at P14 (geta)? The resulting B thickness is superior to the small W corner territory, and there is no aji left for W to exploit.

:b59: might be playable, but it is risky. The previous W extension was not an obvious overplay. The W position may be a bit thin, but there is no need for an immediate invasion. If W later has to add an inefficient stone around D12, that would be good enough for B.

:b83: First thought is simply connect at Q5. After that, P9 would make territory while attacking. (If the territory below P9 looks too narrow, that might be an indication that :b81: was the wrong direction.)

:b93: Can this be P9? (Please verify that W cannot cut.) B would like to get out as fast as possible, to split the W positions here, creating two weak groups.

:w94: and :b95: are big moves, but the right side fight is still urgent. Play around O9 by B would initiate a severe double attack, while a W move there would force B to live small underneath.

:b127: was a blunder(?), but consider continuing with O8 anyway. After that, B can capture the entire upper W group cleanly with one more move, while the B stones below are not all completely dead. This looks like a good trade for B, especially considering the alternative.

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Post #47 Posted: Tue Dec 12, 2017 7:42 am 
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I am at about the same level, but after struggling against opponents like this for a long time, I have found a few things that seem to work for me:

1. I think mitsun has the most important one, which is to prioritize the strength of your own positions. If you leave a cutting point, there is a good chance you'll get cut. So, leave the cut only if you are certain that you can handle it. If I can't clearly see how to deal with the cut, then I err on the side of caution and fix it.

2. Don't get caught up in your opponent's game. This kind of hyper aggressive place forces one to focus heavily on the local position. There are two things that I try to watch out for:

a. Once you are alive, solid locally, I find it importantly to force myself to take a mental step back and look at the whole board -- find the biggest move on the board. For me, black 59 is a good example of this. It is much too early for this move. Black is better off playing one of the corners or thinking about how to profit by attacking the weak group in the top center.

b. Along these lines, it is also easy to get caught up in the local fight and miss that sometimes the fight just is not worth having. Better to play elsewhere and take a local loss for a global gain.

3. I have also found it very important to actively think about how your groups interact with each other. Yes, this is something we should always do, but given how easy it is to get lost in the local fight, I find I have to remind myself of this more in these kinds of games. While I don't think this was a mistake, black 23 is a good example. Black definitely wants to keep white separated, but this move is likely to elicit white 24, which then makes the black group on the right a bit more vulnerable. Personally, I could easily forget to consider how 23 would affect my group on the right.

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