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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #321 Posted: Fri Nov 02, 2018 11:36 am 
Lives with ko

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Uberdude wrote:
Edit: I spoke too soon! Iyama just played an endgame blunder (-50%), a peep that wasn't sente enough when he owed a defensive move, and now Cho has a picnic ko to eat some stones and has a thicker position so more ko threats. That's a silly way to lose a Meijin title match.


I can imagine Fujisawa "The King of Blunders" Shuko reading this, and shaking his head: "Youngsters nowadays... in my time we had really silly ways to lose a title!" :-)

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #322 Posted: Fri Nov 16, 2018 11:54 pm 
Judan

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2nd Oza game is live now. Can Iyama put his recent bad results behind him and get back to business as usual of beating up Ichiriki like his 10 wins in a row in the last set of title matches?

Update: Iyama won by resign. I didn't review with LZ yet, but it seemed to me he was always on the front foot from the top left fighting onwards.

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #323 Posted: Mon Nov 19, 2018 2:44 am 
Judan

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Iyama won the 3rd Oza game too fairly convincingly once the big fighting started.

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #324 Posted: Tue Nov 20, 2018 8:43 am 
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Uberdude wrote:
Iyama won the 3rd Oza game too fairly convincingly once the big fighting started.


With a seven-stone-long stick on the second line, no less!

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #325 Posted: Wed Nov 21, 2018 4:17 am 
Judan

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WindCaliber wrote:
Uberdude wrote:
Iyama won the 3rd Oza game too fairly convincingly once the big fighting started.


With a seven-stone-long stick on the second line, no less!


Reminiscent of AlphaGo vs Park Junghwan. Interestingly LeelaZero said Ichiriki shouldn't have extended the last time as that allowed black to live in sente (getting the turn in sente as followup is a nice bonus but not worth enough for gote) but played first in the centre, even though he would then have to endure Iyama playing hane up which hurts the liberties of the white wall plus being big for territory. But getting the first move in the balance of power fighting in the centre was more important, and is the kind of think I think bots are very good at judging.

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #326 Posted: Fri Nov 23, 2018 3:13 am 
Judan

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And Iyama won the 3rd Tengen game vs Yamashita to take a 2-1 lead there too.

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Post #327 Posted: Sat Nov 24, 2018 9:47 am 
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Uberdude wrote:
And Iyama won the 3rd Tengen game vs Yamashita to take a 2-1 lead there too.


Why did Yamashita resign? It wasn't at all clear to me that black was doing badly. :blackeye:

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Post #328 Posted: Sat Nov 24, 2018 10:02 am 
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Black considered that his M17 group is dead?


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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #329 Posted: Sat Nov 24, 2018 1:35 pm 
Judan

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That black m17 group would be locally dead had been clear for a while, when he resigned it was clear that all the surrounding white groups were alive and therefore m17 wasn't going to live from winning a semeai on one of them.

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #330 Posted: Fri Nov 30, 2018 7:01 am 
Judan

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Ichiriki beat Iyama in the 4th Oza game by 1.5, in the middlegame FineArt said he had 100% win chance so I think he probably slacked off a bit (why not fight ko at top right?). Deciding 5th game is on 13th December.

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #331 Posted: Fri Nov 30, 2018 10:47 am 
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My counting is that Ichiriki Ryo has 9 win and 23 loss against Iyama. It's good that he can finally win some winnable games.

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Post #332 Posted: Thu Dec 06, 2018 5:04 am 
Judan

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Iyama's slumming it back in the Meijin league today, first game against youngster Mutsuura Yuta 7d.

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #333 Posted: Mon Dec 10, 2018 2:44 am 
Judan

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Yamashita beat Iyama in the 4th Tengen game by 2.5 after a nice kill, so Iyama has 2 deciding 5th games coming up: Ichirki in the Oza on 13th and Yamashita for Tengen on the 18th December. So could only have 2 3 of the big 7 titles after that.

Edit:
Kyo Kagen took the Gosei
Cho U took the Meijin
decider vs Ichiriki in Oza
decider vs Yamashita in Tengen
Kisei final vs Yamashita starts in Jan
Honinbo league in progress (Hane and Ichiriki lead 3-0 currently)
Judan at semifinals for challenger (Murakawa, Onishi, Yamashita, Takao)

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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #334 Posted: Mon Dec 10, 2018 3:58 am 
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 Post subject: Re: Following Iyama Yuta (no world ranking discussions)
Post #335 Posted: Thu Dec 13, 2018 3:55 am 
Judan

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Iyama beat Ichiriki by resignation in the deciding 5th game to keep his Oza title. It was a pretty convincing win, FineArt had Iyama around 90% for most of the game (move 67 to resign over 100 moves later).
- Seems like Ichiriki got into a difficult situation early with his q4 AI-style attachment making a heavy group, FineArt wants to tenuki and LZ prefers simple p4 and it becomes like a large avalanche but with white extend not hane.
- Iyama could (FA suggests) have just answered p7 at q7 and said thanks for the bad exchange, allowing black m8 but I suppose he had the sharp shape attack of o6 and q2 squeeze combo planned. My LZ misjudged the power of that at low playouts.
- Black having to defend at n5 is painful, bots suggest m3 cut first: if white has to answer at o3 that's nice (because it's a probe now and later white can easily sacrifice the 3 stones) but actually it seems white can m2 and the squeeze is still good for white so black would be stuffed.
- Black settling on the outside not bad though (FA 45%)
- But why not black hane at f5? It seems like Ichiriki tricked himself with the j6 k4 attachments as they resulted in getting the m3 cut but that only got 3 now-small stones whilst his corner cried.
- c2 passive, keep fighting on outside and there's not a clean kill and black can make other things more important first.
- By move 70 it's kinda game over, black is just pulling out some heavy stones with white safe on both sides.
- There's some more fighting but it all seems within Iyama's control as he settles both groups at top right, even making nice use of q8 with a little sacrifice.
- Black resigns at 186, either his big heavy group from before gets cut and dies, or to save it white saves his top left, plus the black upper middle doesn't have 2 clear eyes yet either.


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