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How is your positional judgement? Game 21 http://www.lifein19x19.com/viewtopic.php?f=15&t=17051 |
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Author: | Bill Spight [ Wed Nov 13, 2019 12:21 pm ] |
Post subject: | How is your positional judgement? Game 21 |
Game 21 As usual, we assume area scoring with 7½ pt. komi. After Elf estimates a winrate of 91½% for one player. Which player is it? Enjoy! |
Author: | TelegraphGo [ Wed Nov 13, 2019 2:44 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | dfan [ Wed Nov 13, 2019 3:34 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | Uberdude [ Wed Nov 13, 2019 3:57 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Someone has made order mistakes in this joseki variation. |
Author: | Knotwilg [ Wed Nov 13, 2019 4:26 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | Bki [ Wed Nov 13, 2019 4:32 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | Gomoto [ Wed Nov 13, 2019 5:32 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | bayu [ Thu Nov 14, 2019 2:05 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | Knotwilg [ Thu Nov 14, 2019 5:08 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
LZ analysis - confirms my no-LZ analysis but with a very interesting main line |
Author: | Kirby [ Thu Nov 14, 2019 2:04 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Author: | John Tilley [ Sat Nov 16, 2019 10:43 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Bill - Thank you for winding the clock back for me! I was just getting into Go in the mid 1960s and I bought the 3 volume Nihon Kiin Fundamental Series in the summer of 19xx and they sent me a free copy of Kido which included this game. I can still name the players, year and round of this title match after some 52 years. A very similar opening occurred two games later of course in that match. Best Wishes - John |
Author: | Bill Spight [ Sat Nov 16, 2019 11:05 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
John Tilley wrote: Bill - Thank you for winding the clock back for me! I was just getting into Go in the mid 1960s and I bought the 3 volume Nihon Kiin Fundamental Series in the summer of 19xx and they sent me a free copy of Kido which included this game. I can still name the players, year and round of this title match after some 52 years. A very similar opening occurred two games later of course in that match. Best Wishes - John This game made a big impression on me. I forget when I first saw it. I wasn't ready for Kido, when I was in Japan. Igo Club was more my speed. I remember that someone took me up to meet the editor of Go World in the Chuo Kaikan. I'm pretty sure it wasn't Bozulich. Maybe Dowsey or you? |
Author: | John Tilley [ Sun Nov 17, 2019 11:45 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Bill's starting position after Black 31 with an advantage of 91.6% to one player is fascinating, however in the actual match there must have been a lot of stress and doubt for Black. White has pressed down and is building on a grand scale and Black must have had some serious doubts. I am sure Bill will do a summary of this game eventually, but note it gets top billing for White in a selection of his games published in 1970 - 24 pages, 18 figures and 44 explanatory diagrams. In real life facing some opponents across the board must be really tough, because of their reputation. No names in the "Hide" button - just their respective ages. Hopefully we will see some more AI analysis. Bill - I think you meant to say that either I or Stuart Dowsey introduced you to Mr Yosida, who was editor of the English language magazine "Go Monthly Review". John Tilley |
Author: | Bill Spight [ Sun Nov 17, 2019 1:53 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
John Tilley wrote: Hopefully we will see some more AI analysis. Oh, you bet! Quote: Bill - I think you meant to say that either I or Stuart Dowsey introduced you to Mr Yosida, who was editor of the English language magazine "Go Monthly Review". John Tilley Thanks, I had forgotten Yosida's name, as well as the magazine's. The memory came back to me when I read your note. IIRC, one of you took me upstairs at the Kiin to meet him. He gave me a complimentary copy of Go Monthly Review. I didn't subscribe to it, but I did take Igo Kurabu. Later I subscribed to Kido, which I till miss. |
Author: | xela [ Sun Dec 08, 2019 12:03 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
A bit late to the party here (so many other interesting conversations on this board over the past two weeks!), but since the official solution hasn't been posted yet, I'll hazard my own guess before peeking at others'. |
Author: | Bill Spight [ Sun Dec 08, 2019 3:34 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Discussion of the Elf commentary |
Author: | Uberdude [ Sun Dec 08, 2019 5:26 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
I think one key factor why the ponnuki isn't great for black and white is happy to trade is the fact White didn't yet make the Q10 r11 exchange. White can later peep at that cutting point to get 1 in sente to help with a possible invasion. R10 is obviously a far better place to have a white stone than Q10 given black has one at r11. The s11 peep is another way to use the cut weakness. |
Author: | Bill Spight [ Mon Dec 09, 2019 12:07 pm ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Since Elf admits to misevaluating , because Lin's move was better, I expect that it misevaluated earlier plays as well. It did not prefer , but it did not, I guess, give it a low enough winrate. I now think that it should have said that it loses 9% to par. Here is it's recommended play, instead. = plays the atari right away. plays kikashi before connecting. Then, with in place, Black does not hane at the head of or , but simply extends. is a wedge to reduce the influence of White's wall. attacks , making a small base at the same time. |
Author: | John Tilley [ Fri Dec 20, 2019 11:56 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Rin had beaten Sakata in the 1965 Meijin and kept the title in 1966 and 1967, so Rin's first Honinbo challenge in 1967 was something special. It fascinated me at the time that Sakata playing White used the sequence in the top right corner in this game and then again in Game 5. The first time he played it, it must have put a lot of pressure on Rin and Sakata won. When Sakata played it again I was stunned, I would love to know what Rin thought. Rin lost Game 5 btw and Sakata kept his Honinbo title. I suspect that if AI had been around then, Sakata would still have played as he did in Game 5 - he would have valued the psychological pressure more than that AI % win rate. Attachment: Sakata - Rin 1967 Honinbo - Game 3-medium.jpg [ 190.65 KiB | Viewed 11742 times ] The photo shows Game 3 - Sakata on the right, Rin on left. Takagawa is watching, with Murakami Bunsho (Amateur Honinbo) to the left of Takagawa. I spoke to Murakami in 1970 about Sakata, he said he couldn't win an even game but had a chance on 2 stones. As I said in a previous post - this game is the highlight game in a two volume collection of Sakata's games, the other four games from the 22nd Hononbo also feature. Never a dull moment. John |
Author: | dhu163 [ Mon Dec 26, 2022 11:50 am ] |
Post subject: | Re: How is your positional judgement? Game 21 |
Surprising. And useful as this is a fairly standard fuseki shape that I've seen (once) even in recent katago self-play. |
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