Life In 19x19 :: 3-4 - high approach - two-space high pincer

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3-4 - high approach - two-space high pincer - ogeima joseki http://www.lifein19x19.com/viewtopic.php?f=15&t=4716	Page 1 of 1

Author: Dusk Eagle [ Sat Sep 24, 2011 3:24 pm ]

Post subject: 3-4 - high approach - two-space high pincer - ogeima joseki

The fuseki below has been played by professionals many times. Its early moves revolve around a well-known joseki in the top right, and that joseki is the focus of my question.

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

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

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

Click Here To Show Diagram Code: [go]$$Bcm27 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O O 1 | $$ | . . . . . . . . . . . . . X X X O X . | $$ | . . . O . . . . . , . . O . . O O X . | $$ | . . . . . . . . . . . . X X X O O X . | $$ | . . . . . . . . . . . . 8 O O X X X 2 | $$ | . . . . . . . . . . . . . 7 X O O O 3 | $$ | . . . . . . . . . . . . . . 6 X . O 4 | $$ | . . . . . . . . . . . . . . . . X O . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . . . 5 . . . . . . . . . . . . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . X . . . . X . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

(For more, see http://loveku.livejournal.com/?skip=2)

My question is: What is the purpose of playing the :b27:

exchange for black? I don't really see what benefit this exchange offers.

Author:	RobertJasiek [ Sat Sep 24, 2011 4:51 pm ]
Post subject:	Re: 3-4 - high approach - two-space high pincer - ogeima jos
Besides maintaining the ordenary eyespace and endgame option Q18, Black looks for a chance to get S10 and T16 with the idea of White T13 - Black R12 to create an approach liberty problem. IOW, R18 is not quite as alive as White would like it to be.

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