Life In 19x19

Iyama and Ichiriki will finish up game 3 of the Kisei title challenge today.

In case anyone else was wondering what watch Iyama wears, I'm pretty sure it's an Aquaracer.

I don't wonder about his watch.

What I wonder about, is what he was thinking.
I can't find the game record yet, but the broadcasts are here:

Day 1:
https://www.youtube.com/watch?v=rPRTYqNMvnY

Day 2:
https://www.youtube.com/watch?v=bTZ-xRk_HQA

Iyama was dominanting from the beggining. By the end of day 1 (SPOILER ALERT!) he was way ahead, according to IA evaluation. Also according to my limited human opinion.

But in the middle of day 2, in a ko fight, he ignored a threat and all of Ichiriki's problems were gone.

REAL SPOILER ALERT! Iyama is still Iyama and blah, blah, blah. But I think Ichiriki might win the match.

pajaro wrote:[cut]
REAL SPOILER ALERT!

His winning chances went down by 60% in a single move. It's the biggest drop I have ever seen in ANY pro game

[cut]

Dang, just jinxed Yang Dingxin.

Or maybe he saw your post and went "hold my beer".

I'm talking of LG Cup's final game #1 from yesterday of course. Haven't checked with an AI yet, but I'd be surprised if that "record" wasn't pulverized.

Thumb wrote:

pajaro wrote:[cut]
REAL SPOILER ALERT!

His winning chances went down by 60% in a single move. It's the biggest drop I have ever seen in ANY pro game

[cut]

Dang, just jinxed Yang Dingxin.

Or maybe he saw your post and went "hold my beer".

I'm talking of LG Cup's final game #1 from yesterday of course. Haven't checked with an AI yet, but I'd be surprised if that "record" wasn't pulverized.

Large percentage swings from a single move (aka blunders) aren't all that rare in pro games, even among top players. Just yesterday, Seo Bongsoo made an inaccurate move in yose that cost him a point. However since it was the very end of the game (which he lost by 0.5 points), that single move dropped his winning chances from 95% to 5%. Or for an example from a longer time format, this game from the 46th Meijin League involved both players making several moves that had 80%+ swings.

Yes, in really close games, in yose, it's not uncommon to see these big swings.

Fujisawa Shuko was famous for his blunders. You can see a famouse one here:

https://senseis.xmp.net/?Poka

You lose about 2 points and go to the history books...

I was thinking that perhaps we could merge this with the original Iyama thread since Iyama Rating Skeptiscm has largely declined into nothingness given his recent good performances internationally . . .

edit: I realize this is the original thread after all (with rating worship posts moved), my bad!

In a really close game (1/2 point), Iyama lost the 4th game of the Kisei to Ichiriki.

It's now 1-3. Iyama recovered from this in the Honinbo against Shibano, can he do it again?

Nongshim Cup

Lost to Mi Yuting. Winning streaks ended.

Already ensure 2nd place at least for Japan Team this year.

I feel like Iyama already did his part and if anything I'm looking forward to seeing other players play.

As for his domestic title performance, as much fun as it is to see pictures of Iyama counting his fingers, I would be very happy for Ichiriki to hold a title again. He's good enough that it will happen. So why not the Kisei?

Looks like Ichiriki will have to wait a bit more.

Today Iyama won the first kadoban game, and now the match is 2-3. The players will meet again in a week, also in Hakone.

I saw the end of that game this morning. I do look forward to Ichiriki holding a title again but I am also glad to see Iyama fighting back and extending the match.

I like day 2 of the games because it's fun when the players reset the board. I was reminded of Castle game shitauchi and that practice would not be so bad for spectators but it does lose the drama if you know it's redecided. Three or four hours is fine to watch a game, but 16+ gets to be too much.

6th game of the Kisei. Iyama won and now it's 3-3.

As usual lately, Iyama started better than Ichiriki. But he fought back and tried to kill a very large group. The thing became a ko (2-step ko, I think). Ichiriki had a chance to pull an upset but in the end, Iyama won. I wonder if all of his games are so close that he needs to fight for his life like this. What about a safe move from time to time?

The deciding game in a week (days 17 th and 18th) in Kyoto.

I forced myself to not watch the first day and I'm happy I did. I watched a bit of the game last night and caught the result this morning. I saw a bit of commentary from Tsuruyama and Kono Rin I'll have to go back and watch it more.

What an exciting Kisei tournament!

pajaro wrote:Ichiriki had a chance to pull an upset but in the end, Iyama won.

When did Ichiriki have a chance? It appeared that Iyama played quite accurately. I recall towards the end the AI on the Nihon Kiin stream went a little haywire but I think that White was always winning that ko.

When white was setting up that ko, his chances were around 50-50. And before even started, when white was preparing, it was 75-25 for black.

All according to NK's AI. But black's chances were very brief. Like if both players are missing something.

If someone is interested, see here:

https://youtu.be/JAv18b90xgw?t=33364