$$Wc punish w's timesuji
$$ . . . O O X . . . |
$$ . . O . O X . . . |
$$ . . O X X O X X . |
$$ X . O X . O O X . |
$$ . O . X O O O X . |
$$ . . O . O X X O 1 |
$$ . . . . . . . X . |
$$ ------------------+
[go]$$Wc punish w's timesuji
$$ . . . O O X . . . |
$$ . . O . O X . . . |
$$ . . O X X O X X . |
$$ X . O X . O O X . |
$$ . O . X O O O X . |
$$ . . O . O X X O 1 |
$$ . . . . . . . X . |
$$ ------------------+[/go]
edit: hint
White, in byomi, needed sente and some time to win the game and he succeeded. Lee Changho failed to punish . should have been at Q1, a big sente move. In the game B had the chance to pay a small fee and grab sente. The tesuji is some moves later and not quite open in the air.
Re: Do you read better than Lee Changho?
Posted: Mon Apr 30, 2012 10:23 am
by Tryss
This?
$$Wc
$$ . . . O O X . . . |
$$ . . O . O X . . . |
$$ . . O X X O X X . |
$$ X . O X . O O X . |
$$ . O . X O O O X . |
$$ . . O . O X X O 1 |
$$ . . . . . . 2 X . |
$$ ------------------+
[go]$$Wc
$$ . . . O O X . . . |
$$ . . O . O X . . . |
$$ . . O X X O X X . |
$$ X . O X . O O X . |
$$ . O . X O O O X . |
$$ . . O . O X X O 1 |
$$ . . . . . . 2 X . |
$$ ------------------+[/go]
Now if white tenuki, black has a nasty ko with the descent at O2 (white take first, but it's huge), and P1 is not sente for white (black can recapture)
If I'm right : Youhouu \o/
Re: Do you read better than Lee Changho?
Posted: Tue May 01, 2012 3:32 pm
by cyclops
The question remains why Tryss' move for b results in a better result for him than if w has played correctly. That is why:
$$Wc W's correct play giving him sente
$$ X . O O X . |
$$ X O O O X . |
$$ . O X X O 2 |
$$ . . 1 . X . |
$$ ------------+
[go]$$Wc
$$ X . O O X . |
$$ X O O O X X |
$$ . O . 8 O O |
$$ . O O . . O |
$$ ------------+[/go]
Re: Do you read better than Lee Changho?
Posted: Tue May 01, 2012 6:13 pm
by cyclops
OK, problem solved, thx HH and MW, the title goes to Triss!!
edit: In the real game Lee Changho as B didn't tenuki as in MW's diagram. So W kept sente to play the winning endgame move elsewhere.
.
is not sente because