It is currently Wed May 24, 2017 4:14 pm

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
Offline
 Post subject: Learning from pro games
Post #1 Posted: Fri Jan 27, 2017 9:41 pm 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
I started learning go about ten years ago after watching Hikura No Go. I reached 3k and then stopped playing. I got interested in the game again after the AlphaGo-Lee Sedol match. I am 1k on OGS right now and have found myself hit a plateau.

Other than doing life and death problems every day, I want to try to improve by studying pro games. The thing is I will quickly forget the variations/explanations after watching a long commentary...So I thought I would start a thread to record things that I found interesting in pro games. Hopefully you guys can learn from them too!


Last edited by ThetaHat on Fri Jan 27, 2017 11:08 pm, edited 1 time in total.

This post by ThetaHat was liked by: gamesorry
Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #2 Posted: Fri Jan 27, 2017 10:23 pm 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
This is based on a commentary by Weiqi TV.

This is the last game of the ten-game match between 潜伏 (Ke Jie) (playing black in this game) and XIUZHI (Park JungHwan). White just responded black's approach in the bottom and then black played on the top left corner. But that was just an endgame sequence, why did he play that so early?

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


In terms of territory, white's best response is the hane.
Click Here To Show Diagram Code
[go]$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X O O O O O . . . . . . . . . . . . |
$$ | . X X O X X O X . . . . . . X . . . . |
$$ | 4 O O X X X . . . , . . . . . , X X . |
$$ | 1 6 O X O X . X . X . . . . X X O . . |
$$ | 5 O O X O . . . . . . . . . . O O . . |
$$ | 2 X X O . . . . . . . . . . . . . . . |
$$ | . X O O O . . . O . . . . . . . . . . |
$$ | . 3 X X O . . . . . . . . . . . . . . |
$$ | . . . . O . . . . , . . . . . O . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . O . . . . . , . . . . O , X . . |
$$ | . . . . . O . . . . . . . X X X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


White clearly got more points in this variation than the actual game. But this would eliminate the ajis such as the attachment at a or the push and cut starting at b. So black knew white's not gonna choose this variation.
Click Here To Show Diagram Code
[go]$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | 8 X O O O O O . . . . . . . . . . . . |
$$ | . X X O X X O X . . . . . . X . . . . |
$$ | O O O X X X . . . , . . . . . , X X . |
$$ | . O O X O X . X . X . . . . X X O . . |
$$ | 7 O O X O . . . . . . . . . . O O . . |
$$ | O X X O . . . . . . . . . . . . . . . |
$$ | . X O O O . . . O . . . . . . . . . . |
$$ | . X X X O . . . . . . . . . . . . . . |
$$ | . . . b O . . . . , . . . . . O . . . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . a . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . O . . . . . , . . . . O , X . . |
$$ | . . . . . O . . . . . . . X X X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


If black plays the peep later, for example, after white exchanges 1 to 7, white is not gonna play a like he did in the actual game because the aji is already gone.
Click Here To Show Diagram Code
[go]$$W
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X O O O O O . . . . . . . . . . . . |
$$ | . X X O X X O X . . . . . . X . . . . |
$$ | a O O X X X . . . , . . . . . , X X . |
$$ | 8 . O X O X . X . X . . . . X X O . . |
$$ | . O O X O . . . . . . . . . . O O . . |
$$ | 9 X X O . . . . . . . . . . . . . . . |
$$ | . X O O O . . . O . . . . . . . . . . |
$$ | . . X X O . . . . . . . . . . . . . . |
$$ | . . 4 3 O . . . . , . . . . . O . . . |
$$ | . . 6 X 5 . . . . . . . . . . . . . . |
$$ | . . 2 1 . . . . . . . . . . . . . . . |
$$ | . . . 7 . . . . . . . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . O . . . . . , . . . . O , X . . |
$$ | . . . . . O . . . . . . . X X X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


In short, that was good timing by black.


This post by ThetaHat was liked by: Marcel Grünauer
Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #3 Posted: Fri Jan 27, 2017 11:42 pm 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
This is based on the commentary by Meng Tailing in an episode of 歪歪冲9 (a Weiqi TV show where an amateur player plays a game on tygem (live) and then he reviews it with her). It's not a pro game but I think the position is interesting so I've decided to post it here.

White plays a very common probe against the 3-4 enclosure and black extends. White can come back and live in the corner later by exchanging white a, black b, white c. What should black play if he wants to kill off the aji?

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


Black 1 is very solid but too slow. White can attach at 2 to make black overconcentrated.
Click Here To Show Diagram Code
[go]$$c
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . 2 X . . . . |
$$ | . . . O . . . . . , . . . . . . X O . |
$$ | . . . . . . . . . . . . . . . . X 1 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . , . . . . . , . . . . . . X . . |
$$ | . . . O . . . . . . . . . X . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Black should play the one-space extension at 1. This threatens to invade at a and white can't to live in the corner anymore after black peeps at 3.

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


Variation 1:
White's three stones are able to escape but they are very heavy. Black can tenuki and invade at 4 first.

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


Variation 2:
White is dead after black descends.

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


This post by ThetaHat was liked by: Marcel Grünauer
Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #4 Posted: Sat Jan 28, 2017 9:58 pm 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
Original commentary: https://youtu.be/e5lK8WmpBKA?t=8m10s

This is a game between 風雨(B) and Master(W). Black just played the shoulder hit. How would you respond?

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


In this position I would probably just consider playing a or b, but Master teaches me there are other ways to respond a shoulder hit.

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


Variation 1

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


Variation 2

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


In both variations, white loses the potential to develop a framework.

So in the actual game, Master responded with a pincer! After black connected at 4, white solidified its shape on the top and then came back to play the tiger mouth on the bottom. White successfully maintained its framework in the bottom left quarter of the board.

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


Click Here To Show Diagram Code
[go]$$Wcm11
$$ ---------------------------------------
$$ | . . . . . . X . . . . . . . . . . . . |
$$ | . . . . X X O X 2 . . . . . . O X . . |
$$ | . X . O X O 1 O . . . . X . O X . . . |
$$ | . . X X O O . O . , X . . . . . X . . |
$$ | . . X O . . . . . . . . . . . O X . . |
$$ | . . . O . . . . . . . . . . . O . . . |
$$ | . . X . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . O . . . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . . X . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , O . O . . X . . . |
$$ | . . . . . O . . . . . 3 X X . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


It's hard not to appreciate Master's global thinking and flexible plays!


This post by ThetaHat was liked by: dust
Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #5 Posted: Sun Jan 29, 2017 6:33 am 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
This is a very common pattern that appears in the orthodox opening. I wanna show some variations that I learned from a commentary by Chang Hao 9p on a game between Ke Jie(B) and Park Yeonghun(W).

White has two possible responses to black's invasion, a or b.

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


If white plays a:

A simple position where white gives up the two stones.

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


If white plays b, black can either block at a or hane at b:

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


If black blocks, black has two choices after white 4:

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


If a:

Black should just connect at 5 when white hanes.

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


If black descends, white can get the atari on the outside. Black has bad shape.

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


White also needs to be careful not to play the atari before the hane, because black will hane back after he connects.

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


If b:

White can take the corner and use sente to protect the other group.

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


White can also consider playing this (requires a favourable ladder).

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


In the game, black played the hane on the outside, which is a more modern and complicated pattern. White needs a ladder here. If the ladder works for black, black can just play a to kill the two stones.

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


If white has the ladder, black needs to extend. Notice that white 16 actually has a chance to capture the corner.

Click Here To Show Diagram Code
[go]$$Bcm11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . 4 . |
$$ | . . . . . . . . . . . . . . . O O 3 5 |
$$ | . . . . . . . . . . . . 1 X X O X X . |
$$ | . . . O . . . . . , . . . O O X O 2 6 |
$$ | . . . . . . . . . . . . . . X X 7 8 . |
$$ | . . . . . . . . . . . . . . . . O 9 . |
$$ | . . . . . . . . . . . . . . . . . 0 . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


But if white does, white will get completely sealed in. This result is bad for white.

Click Here To Show Diagram Code
[go]$$Wcm16
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . O 3 |
$$ | . . . . . . . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . X X X O . . 1 |
$$ | . . . O . . . . . , . . . O O X O O O |
$$ | . . . . . . . . . . . . . . X X X 2 4 |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Back to the actual game. That one black stone has still some aji, but since white a is sente, white is completely safe.

Click Here To Show Diagram Code
[go]$$Bcm21
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . O . |
$$ | . . . . . . . . . . . . . . 1 O O X X |
$$ | . . . . . 5 . . . . . . X X X O X X . |
$$ | . . . O . . . . . , . . . O O X O O O |
$$ | . . . . . . . . . . . . . 3 X X X O . |
$$ | . . 6 . . . . . . . . . . . . 2 O X a |
$$ | . . . . . . . . . . . . . . 7 . . O . |
$$ | . . . . . . . . . . . . . . . 8 B . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 4 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


This post by ThetaHat was liked by: ez4u
Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #6 Posted: Sun Jan 29, 2017 6:50 am 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
I also learned how to choose the right pincer.

Why does white play the one-space high pincer here?
Click Here To Show Diagram Code
[go]$$Bcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . O . |
$$ | . . . . . . . . . . . . . . X O O X X |
$$ | . . . . . X . . . . . . X X X O X X . |
$$ | . . . O . . . . . , . . . O O X O O O |
$$ | . . . . . . . . . . . . . X X X X O . |
$$ | . . O . . . . . . . . . . . . O O X . |
$$ | . . . . . . . . . . . . . . X . . O . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . 2 . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . 1 . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


If white picks a wide pincer, black can re-approach to develop the bottom side, and the marked stone can still escape later.

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


But if white chooses a tight pincer, that one stone doesn't have any aji left with white's tiger mouth strong shape.
This is a better variation for white if black really chooses to re-approach (so in the game he didn't).

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

Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #7 Posted: Sun Jan 29, 2017 6:56 am 
Oza

Posts: 2182
Location: ʍoquıɐɹ ǝɥʇ ɹǝʌo 'ǝɹǝɥʍǝɯos
Liked others: 237
Was liked: 659
Rank: AGA 5d
GD Posts: 4312
Online playing schedule: Every tenth February 29th from 20:00-20:01 (if time permits)
If you only took up the game again within the last month it seems that to say you have hit a plateau seems a little exaggerated. I think of a plateau as being stuck for a prolonged period of time, say a year or at least 6 months.

More likely, you quickly got back to where you were 10 years ago and are at the base of the mountain. You now need to start the climb up. Whether the mountain has a plateau on the top remains to be seen.

But your thread is certainly a step in the right direction.

_________________
Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).

Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #8 Posted: Sun Jan 29, 2017 8:10 am 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
DrStraw wrote:
If you only took up the game again within the last month it seems that to say you have hit a plateau seems a little exaggerated. I think of a plateau as being stuck for a prolonged period of time, say a year or at least 6 months.

More likely, you quickly got back to where you were 10 years ago and are at the base of the mountain. You now need to start the climb up. Whether the mountain has a plateau on the top remains to be seen.

But your thread is certainly a step in the right direction.


You're probably right. I actually just stuck at the same level for 2-3 months. I shouldn't be worrying about that too much. I guess I am just looking for ways to keep improving.

Thanks for your comment. :)

Top
 Profile  
 
Offline
 Post subject: Re: Learning from pro games
Post #9 Posted: Sun Feb 05, 2017 12:16 am 
Dies in gote

Posts: 40
Liked others: 0
Was liked: 6
Here is another common pattern appears in the orthodox opening. This appears in a game between Choi Cheolhan (B) and Shi Yue (W)

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


Click Here To Show Diagram Code
[go]$$Wcm11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X . . . . . |
$$ | . . . O . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . , . . . . . , . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . 1 . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . 2 . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . . X . . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Why white 9 doesn't hane at a?

If white hanes now, black can cut off a white stone. After white lives in the corner, black can attack the one white stone on the top right corner.

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


But if the marked stone is already there, black can't ladder that one stone.
Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X . . . . . |
$$ | . . . O . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . W . . . |
$$ | . . . , . . . . . , . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 6 . . |
$$ | . . . . . . . . . . . . . . . . O 4 . |
$$ | . . . . . . . . . . . . . . . X 2 3 . |
$$ | . . . . . . . . . . . . . . . X O 5 . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . . X 1 . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


What is black 10 aiming at?

Black 10 magically prevents white from hane in the corner.
Click Here To Show Diagram Code
[go]$$Wcm1
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X . . . . . |
$$ | . . . O . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . , . . . . . , . . . . . . X 0 . |
$$ | . . . . . . . . . . . . . . . 8 7 9 . |
$$ | . . . . . . . . . . . . . . . 6 O 4 . |
$$ | . . . . . . . . . . . . . . . X 2 3 . |
$$ | . . . . . . . . . . . . . . . X O 5 . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . , . . . . . , . . . . . . X 1 . |
$$ | . . . O . . . . . . . . . . X . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Even if white defended with the marked stone, white still can't hane. That's why in the game black was able to tenuki and approach the lower left corner.

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


This post by ThetaHat was liked by: ez4u
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group