White to play.

Bill Spight · **#21**

mitsun wrote:

Click Here To Show Diagram Code: [go]$$Wc White to play. $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . O . . O . . X . . | $$ | . . . O . O . . . , . . . . . X . . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . . O X . . . . . . . . . . . . X . . | $$ | . . X . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . X . . . | $$ | . . X . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . a c . . . . . . . . | $$ | . . . O . . . . . , b d . . . X . . . | $$ | . . O . . X . . X . . . . . . . 1 . . | $$ | . . O X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ----------------------------------------[/go]

Since the two B wings are nearly equal, the symmetrical invasion at :w1:

would be my first choice. B will probably block the left side, where the extension is slightly wider. W should be able to live in sente, then set about reducing the resulting B thickness. W can strive for more efficiency by trying to make exchanges a-b-c-d before invading, but there is no guarantee B will play along.

Certainly a viable plan. I did not mention it because, IMO, it is difficult for kyu players to handle.

illluck · **#22**

mitsun wrote:

Click Here To Show Diagram Code: [go]$$Wc White to play. $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . O . . O . . X . . | $$ | . . . O . O . . . , . . . . . X . . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . . O X . . . . . . . . . . . . X . . | $$ | . . X . . . . . . . . . . . . . . . . | $$ | . . . X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . X . . . | $$ | . . X . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . a c . . . . . . . . | $$ | . . . O . . . . . , b d . . . X . . . | $$ | . . O . . X . . X . . . . . . . 1 . . | $$ | . . O X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ----------------------------------------[/go]

Since the two B wings are nearly equal, the symmetrical invasion at :w1:

would be my first choice. B will probably block the left side, where the extension is slightly wider. W should be able to live in sente, then set about reducing the resulting B thickness. W can strive for more efficiency by trying to make exchanges a-b-c-d before invading, but there is no guarantee B will play along.

I sort of feel like that black will block from top due to the nice reductions bot (which is why I wanted to attach one point above 1 or the submarine from the top). One thing I was also wondering is whether stablising the black group below makes the second line block on the lower right corner even worse, but I guess that's not really as important as getting an invasion in.

White to play.

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