On Saturday the preliminaries of the Professional Pair-GO Championship were played at the Nihon Kiin. After the second round the pro waiting room was quite crowded and the (unnamed) author set out the problem below for everyone's consideration. It looks easy, Takao wrote. But 5 minutes... 10 minutes...
So what do you think?
$$Bc Black to Play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . . . . . . . . . | $$ | . . . . . . . X X O X X . . . . . . . | $$ | . . . . . . . X O . O X . . . . . . . | $$ | . . . , X X X . O , O X . . . , . . . | $$ | . . . X . O O . . O . . X . . . . . . | $$ | . . . X . O . . . . . O X . . . . . . | $$ | . . . . X O O . . O . O X . . . . . . | $$ | . . . . X X X X X O . X X . . . . . . | $$ | . . . . . . . . . X X . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$Bc Black to Play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . . . . . . . . . | $$ | . . . . . . . X X O X X . . . . . . . | $$ | . . . . . . . X O . O X . . . . . . . | $$ | . . . , X X X . O , O X . . . , . . . | $$ | . . . X . O O . . O . . X . . . . . . | $$ | . . . X . O . . . . . O X . . . . . . | $$ | . . . . X O O . . O . O X . . . . . . | $$ | . . . . X X X X X O . X X . . . . . . | $$ | . . . . . . . . . X X . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Re: Small Problem from Takao Shinji's Blog
Posted: Wed Feb 13, 2013 9:00 pm
by gonut
Black seems to have 4 straightforward inside forcing moves to limit White to one eye. Maybe White can give up some stones to live small, but I don't see how.
B-J8, W-J7, B-H8, W-H7, B-H9, W-H10, B-J9. Next, Black has the obvious forcing move at K11.
Re: Small Problem from Takao Shinji's Blog
Posted: Wed Feb 13, 2013 11:10 pm
by ez4u
gonut wrote:Black seems to have 4 straightforward inside forcing moves to limit White to one eye. Maybe White can give up some stones to live small, but I don't see how.
B-J8, W-J7, B-H8, W-H7, B-H9, W-H10, B-J9. Next, Black has the obvious forcing move at K11.
Perfect!
$$Bc Black to Play $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . . . . . . . . . | $$ | . . . . . . . X X O X X . . . . . . . | $$ | . . . . . . . X O . O X . . . . . . . | $$ | . . . , X X X 6 O , O X . . . , . . . | $$ | . . . X . O O 5 7 O . . X . . . . . . | $$ | . . . X . O . 3 1 . . O X . . . . . . | $$ | . . . . X O O 4 2 O . O X . . . . . . | $$ | . . . . X X X X X O . X X . . . . . . | $$ | . . . . . . . . . X X . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
