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The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 2:38 am
by dany
Shin Jinseo (Black) vs. Park Geunho (White)
http://go4go.net/go/games/sgfview/110919
$$c
Click Here To Show Diagram Code [go]$$c
Black did not find the best answer and made a move to "a"
Re: The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 10:53 am
by pwaldron
$$c
Click Here To Show Diagram Code [go]$$c
Looks like b picks up an extra liberty to win the capturing race.
Re: The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 12:24 pm
by jlt
Just Q12? If White plays Q18 or Q19 next then Black O19.
Re: The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 12:39 pm
by kvasir
Maybe I figured it out?
$$c
Click Here To Show Diagram Code [go]$$c was what I thought it was but I didn't post because it didn't look much better than removing a liberty. Now I think
is the key to get it to work.
$$Wcm4 Black wins capturing race.
Click Here To Show Diagram Code [go]$$Wcm4 Black wins capturing race.$$Wcm4 Resistance is futile.
Click Here To Show Diagram Code [go]$$Wcm4 Resistance is futile. $$c It is really forced, right?
Click Here To Show Diagram Code [go]$$c It is really forced, right?
Re: The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 1:16 pm
by dany
pwaldron wrote:
$$c
Click Here To Show Diagram Code [go]$$c
Looks like b picks up an extra liberty to win the capturing race.
Yes
Re: The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 1:16 pm
by dany
jlt wrote: Just Q12? If White plays Q18 or Q19 next then Black O19.
Yes
Re: The blunder in Korean Yongseong, final 2
Posted: Thu Sep 07, 2023 1:48 pm
by dany
kvasir wrote: Maybe I figured it out?
$$c
Click Here To Show Diagram Code [go]$$c was what I thought it was but I didn't post because it didn't look much better than removing a liberty. Now I think
is the key to get it to work.
$$Wcm4 Black wins capturing race.
Click Here To Show Diagram Code [go]$$Wcm4 Black wins capturing race.$$Wcm4 Resistance is futile.
Click Here To Show Diagram Code [go]$$Wcm4 Resistance is futile. $$c It is really forced, right?
Click Here To Show Diagram Code [go]$$c It is really forced, right?
Great idea! And the best black response. Black +30 (the last diagram)
Re: The blunder in Korean Yongseong, final 2
Posted: Sun Sep 10, 2023 6:21 pm
by Kirby
I was told that this was an error in the move order of transcribing of the game. Apparently, after white P9 in the game, B L17, W T14, B T17, W Q19 was the order actually played in the game.
Re: The blunder in Korean Yongseong, final 2
Posted: Mon Sep 11, 2023 2:35 am
by dany
Kirby wrote: I was told that this was an error in the move order of transcribing of the game. Apparently, after white P9 in the game, B L17, W T14, B T17, W Q19 was the order actually played in the game.
Actually, there was an error in the game record.
https://www.youtube.com/watch?v=AagL0YHjtpc&t=2194s
Re: The blunder in Korean Yongseong, final 2
Posted: Mon Sep 11, 2023 6:15 am
by John Fairbairn
A somewhat different aspect. The Japanese Ryusei uses 30s/move + 10x1m. The Korean Ryusei (this Yongseong) uses 30 min each play 20s Fischer increment.
Re: The blunder in Korean Yongseong, final 2
Posted: Mon Sep 11, 2023 6:40 am
by jlt
Assuming it's a game with 240 moves and both players use all their time, both last at most 140 minutes. However, players at the Ryusei competition probably move many times before 30 seconds so the Yongseong looks more comfortable. Anyway in the mentioned game, both players had more that 20 minutes left on their clock.
Re: The blunder in Korean Yongseong, final 2
Posted: Tue Sep 12, 2023 2:16 am
by John Fairbairn
Just tidying up the latest GoGoD update for SmartGo, I noticed something that does not seem to have been mentioned yet.
was what I thought it was but I didn't post because it didn't look much better than removing a liberty. Now I think 
is the key to get it to work.