Under the radar

For lessons, as well as threads about specific moves, and anything else worth studying.
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Gomoto
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Under the radar

Post by Gomoto »

While watching one of BadukDoctor's videos, Katago suggested me to take a closer look at this shape:
Click Here To Show Diagram Code
[go]$$B
$$ . . . . . . . . . . . . |
$$ . . . . . . . . . . . . |
$$ . . . . . . . . . O . . |
$$ . . . . . . . . O . . . |
$$ . . X . . . X X X O . . |
$$ . . . . . . X O O X X . |
$$ . . . . . . . . . O . . |
$$ . . . . . . . . . . . . |
$$ ------------------------+[/go]
The shape is a continuation of this joseki:
Click Here To Show Diagram Code
[go]$$B
$$ . . . . . . . . . . . . |
$$ . . . . . . . . . . . . |
$$ . . . . . . . . . O . . |
$$ . . . . . . . . . . . . |
$$ . . X . . . X X . O . . |
$$ . . . . . . X O O . . . |
$$ . . . . . . . . . . . . |
$$ . . . . . . . . . . . . |
$$ ------------------------+[/go]
Gomoto
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Re: Under the radar

Post by Gomoto »

Let us take this postion from a pro game as a reference:

Yu Zhengqi, 7d - Shida Tatsuya, 7d, W+1.5 (Komi 6.5)
62nd NHK Cup, Round 1, 2014-03-03

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

Post by Gomoto »

The pros play all the time this continuation:
Click Here To Show Diagram Code
[go]$$W
$$ ---------------------------------------
$$ | . . . . O . . . . . . . . . . . . . . |
$$ | . . X O . O . . . X . . . . . . X O . |
$$ | . X O X O . X . X X X O . O X X O O . |
$$ | . . . X . . . X O X O . . X X O X . . |
$$ | . . . X . X X O O O O O . . . O . . . |
$$ | . . . . . . O . . . X . . . . . . . . |
$$ | . . . . . . . . . X . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . O . O . . . . . X . . . X X X O 3 . |
$$ | . . . . . O . . . . . . . X O O X X . |
$$ | . . . . . . . . . . . . . 2 . . O 1 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Gomoto
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Re: Under the radar

Post by Gomoto »

But now take note of the strong white positions on the outside of the shape:
Click Here To Show Diagram Code
[go]$$W
$$ ---------------------------------------
$$ | . . . . O . . . . . . . . . . . . . . |
$$ | . . X O . O . . . X . . . . . . X O . |
$$ | . X O X O . X . X X X O . O X X O O . |
$$ | . . . X . . . X O X O . . X X Q X . . |
$$ | . . . X . X X O O O O O . . . Q . . . |
$$ | . . . . . . O . . . X . . . . . . . . |
$$ | . . . . . . . . . X . . . . . Q . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . Q . . |
$$ | . . . . . . . . . . . . . . . Q . . . |
$$ | . Q . Q . . . . . X . . . X X X Q . . |
$$ | . . . . . Q . . . . . . . X O O X X . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Gomoto
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Re: Under the radar

Post by Gomoto »

White can surprise black with this alternative if there is such strong support on the outside.
Click Here To Show Diagram Code
[go]$$W
$$ ---------------------------------------
$$ | . . . . O . . . . . . . . . . . . . . |
$$ | . . X O . O . . . X . . . . . . X O . |
$$ | . X O X O . X . X X X O . O X X O O . |
$$ | . . . X . . . X O X O . . X X O X . . |
$$ | . . . X . X X O O O O O . . . O . . . |
$$ | . . . . . . O . . . X . . . . . . . . |
$$ | . . . . . . . . . X . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . O . O . . . . . X . . . X X X O . . |
$$ | . . . . . O . . . . . . . X O O X X . |
$$ | . . . . . . . . . . . . . 1 . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
alt.JPG
alt.JPG (78.5 KiB) Viewed 8373 times
Gomoto
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Re: Under the radar

Post by Gomoto »

Example continuation:
Click Here To Show Diagram Code
[go]$$W
$$ ---------------------------------------
$$ | . . . . O . . . . . . . . . . . . . . |
$$ | . . X O . O . . . X . . . . . . X O . |
$$ | . X O X O . X . X X X O . O X X O O . |
$$ | . . . X . . . X O X O . . X X O X . . |
$$ | . . . X . X X O O O O O . . . O . . . |
$$ | . . . . . . O . . . X . . . . . . . . |
$$ | . . . . . . . . . X . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . 8 . . O . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . O . O . . . . . X . 7 . X X X O . . |
$$ | . . . . . O . . . . . . . X O O X X . |
$$ | . . . . . . . . . . . . 3 1 5 4 O 2 . |
$$ | . . . . . . . . . . . . . . . . 6 . . |
$$ ---------------------------------------[/go]
alt2.JPG
alt2.JPG (79.33 KiB) Viewed 8370 times
Gomoto
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Re: Under the radar

Post by Gomoto »

Just be careful. The usefullness of this alternative move depends a lot on the surrounding position.
Gomoto
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Re: Under the radar

Post by Gomoto »

In this game by Baduk Doctor the move would have been a good alternative too (7:24 in the video):

https://www.youtube.com/watch?v=u9Rb25T ... e=youtu.be
alt3.JPG
alt3.JPG (74.89 KiB) Viewed 8355 times
Last edited by Gomoto on Tue Feb 25, 2020 2:58 am, edited 1 time in total.
Uberdude
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Re: Under the radar

Post by Uberdude »

Gomoto wrote:The pros play all the time this continuation:
Not all, there was a Go Seigen game in one of JF's books where they (can't recall if Go or opponent, but probably Go) had the hane resistance, or at least it was talked about in the commentary. But yes, it is an alternative we shouldn't neglect to consider, and pros probably do suffer from too much autopilot. However, there could be a selection bias in that if the hane is a good resistance and black is aware of that he won't cut in the corner but immediately play the 2nd line descent.
Gomoto
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Re: Under the radar

Post by Gomoto »

Good old Go Seigen, always a pleasure to meet him again.
Gomoto
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Re: Under the radar

Post by Gomoto »

Two continuations:
alt4.JPG
alt4.JPG (75.42 KiB) Viewed 8357 times
alt5.JPG
alt5.JPG (75.36 KiB) Viewed 8356 times
Gomoto
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Re: Under the radar

Post by Gomoto »

Just to be clear. My intention is not at all to disrespect the Pros. I just post because I like unusual moves. A usual move would be of less interest to me, as it is already widely known.
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ez4u
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Re: Under the radar

Post by ez4u »

The earliest example in GoGoD, B+R.
Click Here To Show Diagram Code
[go]$$B Zhou Pingqiang (White) - Lin Zhihan Taiwan Guoshou League 2007-07-24
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . O . . . . . . . X . . . . . |
$$ | . X . O . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 7 . . . |
$$ | . . . . . . . . . . . . . . . . . 3 . |
$$ | . . X . . . . . . . . . . 0 . O O 1 . |
$$ | . . . . . . . . . . . . . . . O X 5 . |
$$ | . X . O . . . . . , . . . . X O X 4 . |
$$ | . . O . . O . . . . . . . X 9 X O X 6 |
$$ | . . . . . . . . . . . . . . . 8 O 2 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Dave Sigaty
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Gomoto
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Re: Under the radar

Post by Gomoto »

In my 105.000 game database there are two more games with this move and the 4th line expansion (and 3 with the third line expansion).
This is one of them:

Fan Tingyu 9d - Motoki Katsuya 8d, W+Resign (Komi 6.5)
20th Nongshim Cup, Game 4, 2018-10-19

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