I played one game on Tygem this morning, which got me promoted to 1d.
Position #34, Black to play in the lower-right quadrant. Several good moves are possible, but I thought I would record a sequence shown by Katago whose idea is not (yet) natural to me.
[go]$$Wc White to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . O . . . . . . . . . X O . . | $$ | . . . O . O O O X X . . . . . X O . . | $$ | . . X O X O X O . . . . . . . . X O . | $$ | . O O O X X X O X X O . . . . . X O . | $$ | . . X X . . . X O O X X . . . . X O . | $$ | . . . . . . . X . O O O X X . . X . . | $$ | . . . . . . . . . . . O O O X . . . . | $$ | . . . , X . . . X X O O X X . X . . . | $$ | . . . . . X . X . O O X X . . . . . . | $$ | . . . O . O O O . O O O X . . . . . . | $$ | . . . . . . . . O X . O X . . . . . . | $$ | . . . . . . . O X . X O X . . . . . . | $$ | . . . . . O . X X . X X . . . X . . . | $$ | . . . O . . . . . O . . . X . , X . . | $$ | . . . . . . . . . . . . O . . O O . . | $$ | . . . . . . . . . . . . . O . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
[go]$$Wc Possible answer $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . O . . . . . . . . . X O . . | $$ | . . . O . O O O X X . . . . . X O . . | $$ | . . X O X O X O . . 3 . . . . . X O . | $$ | . O O O X X X O X X O 2 . . . . X O . | $$ | . . X X . . . X O O X X 1 . . . X O . | $$ | . . . . . . . X . O O O X X . . X . . | $$ | . . . . . . . . . . . O O O X . . . . | $$ | . . . , X . . . X X O O X X . X . . . | $$ | . . . . . X . X . O O X X . . . . . . | $$ | . . . O . O O O . O O O X . . . . . . | $$ | . . . . . . . . O X . O X . . . . . . | $$ | . . . . . . . O X . X O X . . . . . . | $$ | . . . . . O . X X . X X . . . X . . . | $$ | . . . O . . . . . O . . . X . , X . . | $$ | . . . . . . . . . . . . O . . O O . . | $$ | . . . . . . . . . . . . . O . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
The group separates two black groups. White can try to kill one of them. The continuation is not easy to read but anyway White has nothing to lose, since everything happens in Black's area.
Other moves instead of , like L15 or M15, are also possible, with the same idea.
[go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . O . . . . . | $$ | . . . . . . . . . . . . X O . O O . . | $$ | . . X , X . . . . , . X . X . X X . . | $$ | . . . . . . . . . . . . X X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . O . , . . . . . , . . . . . , X . . | $$ | . X O O . . . . O O O . . . . . . X . | $$ | X . X . O . . . X X O X . . X X X O . | $$ | . X . . . O . . X O X X O . O X O . O | $$ | . . . X . . . O O O . . O . O O . O . | $$ | . . X . . . . . X X X X X X O . O . . | $$ | . . X O . O X . X O O O X . X O O . . | $$ | . O O . . O . X O . . . O . X . . . . | $$ | . . . . . . . X O . O . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
[go]$$Bc Black to play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . O . . . . . | $$ | . . . . . . . . . . . . X O . O O . . | $$ | . . X , X . . . . , . X . X . X X . . | $$ | . . . . . . . . . . . . X X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . O . , . . . . . , . . . . . , X . . | $$ | . X O O . . . . O O O . . . . . . X . | $$ | X . X . O . . . X X O X . . X X X O . | $$ | . X . . . O . . X O X X O . O X O . O | $$ | . . . X . . . O O O . . O . O O . O . | $$ | . . X . . . . . X X X X X X O . O . . | $$ | . . X O . O X . X O O O X . X O O . . | $$ | . O O . . O . X O . . . O . X . . . . | $$ | . . . . . . . X O . O . . . . . X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
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