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 Post subject: 2006 NHK Blunder, Nakano Yasuhiro vs. Ishida Yoshio
Post #1 Posted: Fri May 01, 2020 6:44 am 
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This is a game, I believe, from the 54th NHK cup (I have kifu saying it was in March, another in April). Someone posted it in reddit and it pinged my interest.



The last two moves are here.


I was checking it on my mobile with Ah Q Go (sorry; my GPU died and I haven't gotten around to configuring Leela on CPU-only mode), and there are some things that pike my interest.

* The robot doesn't seem to register MV 271 as a blunder. It does register MV 272 as a winning move in the graph, but neither is in Ah Q's list of blunders or tesuji.

It's not that I need either in this particular case, but it looks like I'm missing something, there. On the workings of the program, at the very least.

But, also, there's some L&D I'm not sure about. Before the blunder...

All five lower groups are alive. I mean, there might be an option to kill the group at O1..O5 in exchange for something. Maybe. But I wouldn't count on it. I most certainly wouldn't be able to.

The inverted T at K4 is dead, a single stone from capture. That makes the while center White, alive.

Top right white seems very much alive to me, too. I don't see a way to kill it that is not all smoke and mirrors.

The one I'm not sure is White's centre-right group at M7..S7. I see it dead (I see no way to turn that twisted-4 into two eyes), but I'm not sure if there wouldn't be a way to win the race with the group at Black's "H" at R11..T13 and its left wormish cousin.

It looks like there are a lot of ifs for a game supposedly well in Black's favor... before that move.

Am I missing something or is it "just" that Leela's already read that rightmost fight and considers it in Black's favor?

Thank you. Take care


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 Post subject: Re: 2006 NHK Blunder, Nakano Yasuhiro vs. Ishida Yoshio
Post #2 Posted: Fri May 01, 2020 7:06 am 
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Yes, this is famos on youtube since many years:

https://www.youtube.com/watch?v=qt1FvPxmmfE

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 Post subject: Re: 2006 NHK Blunder, Nakano Yasuhiro vs. Ishida Yoshio
Post #3 Posted: Fri May 01, 2020 7:48 am 
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joachim wrote:
Yes, this is famos on youtube since many years:


I suppose. I included this video itself in the spoiler, but I haven't been able to find the full one.

Take care.

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 Post subject: Re: 2006 NHK Blunder, Nakano Yasuhiro vs. Ishida Yoshio
Post #4 Posted: Fri May 01, 2020 3:42 pm 
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Ferran wrote:
This is a game, I believe, from the 54th NHK cup (I have kifu saying it was in March, another in April).

Playing date 2006-03-13, broadcast date 2006-04-09.

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 Post subject: Re: 2006 NHK Blunder, Nakano Yasuhiro vs. Ishida Yoshio
Post #5 Posted: Fri May 01, 2020 6:17 pm 
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<pedant>Pique?</pedant>

Thanks for posting this interesting game! I hadn't seen it before.

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