This is just one situation, but in general pros are always looking to squeeze the most value out of every stone. I'd heard about how pros study tsumego until they know every way to live, die, and make ko. I've also seen some struggling to make groups live in games when I keep looking at the simple way to live.
But they want to get ahead, and not only live, but live in the best way they possibly can. Fantastic exercise.
[go]$$W This way? $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . O . . . . . . . . $$ | O O . . . . . . . . . $$ | O X O O . . . . . , . $$ | 1 X X X O O . . . . . $$ | 2 X . X X O . O . . . $$ | . . . . B W C . . . . $$ ----------------------[/go]
is sente. Then we can count 5 points for Black and 1 point for White ( ). (The stone and just indicate equity. We do not expect play to go this way. Either Black or White will play hane-connect.)
[go]$$W Correct response $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . O . . . . . . . . $$ | O O . . . . . . . . . $$ | O X O O . . . . . , . $$ | 2 X X X O O . . . . . $$ | . . . X X O . O . . . $$ | . X . 4 1 5 C . . . . $$ ----------------------[/go]
is the correct response. Later is sente. The result is still 5 points for Black and 1 point for White. Which sente to play depends upon the rest of the board.
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This stuff is interesting, but I can't help feeling it is pretty irrelevant to making me play better. For example I lost a tournament game this weekend because I got the following endgame question wrong:
Do you?
a) save 2 stones (with a few dame nearby) b) save 12 stones (with lots of dame nearby)
My plan was b, but then at the last minute I changed my mind and played a. Woops.
Last edited by Uberdude on Mon Apr 08, 2013 5:58 am, edited 1 time in total.
[go]$$W Background? $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . O . . . . . . . . $$ | O O . . . . . . . . . $$ | 1 X O O . . . . . , . $$ | . X X X O O . . . . . $$ | . a . X X O . O . . . $$ | . . . . . . . . . . . $$ ----------------------[/go]
If this is the preceding play, then we know that White has given up on the indirect ko that starts with "a". So Black is ko master? Should this alter our evaluation of the outcomes?
[go]$$W Why not just kill? $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . O . . . . . . . . $$ | 3 O . . . . . . . . . $$ | 1 X O O . . . . . , . $$ | . X X X O O . . . . . $$ | . . . X X O . O . . . $$ | . . . . b . . . . . . $$ ----------------------[/go]
If the idea is that Black played tenuki after the hane at , then why connect at instead of killing with the second hane at "b"?
_________________ Dave Sigaty "Short-lived are both the praiser and the praised, and rememberer and the remembered..." - Marcus Aurelius; Meditations, VIII 21
[go]$$W Background? $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . O . . . . . . . . $$ | O O . . . . . . . . . $$ | 1 X O O . . . . . , . $$ | . X X X O O . . . . . $$ | . a . X X O . O . . . $$ | . . . . . . . . . . . $$ ----------------------[/go]
If this is the preceding play, then we know that White has given up on the indirect ko that starts with "a". So Black is ko master? Should this alter our evaluation of the outcomes?
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Bill Spight
is sente. Then we can count 5 points for Black and 1 point for White ( 
). (The 
stone and 
just indicate equity. We do not expect play to go this way. Either Black or White will play hane-connect.)
is a mistake. Because of shortage of liberties, Black cannot play 
at 7. 
holds Black to one eye.
is sente. The result is still 5 points for Black and 1 point for White. Which sente to play depends upon the rest of the board.
takes the vital point. 
, 
kills, because of Black's shortage of liberties.
transposes to the same ko as above. 
The problem is as given.