Search found 2018 matches

by HermanHiddema
Thu Oct 26, 2023 8:12 am
Forum: Amateurs
Topic: Curious position
Replies: 54
Views: 97137

Re: Curious position

by HermanHiddema
Thu Apr 28, 2022 5:51 am
Forum: General Go Chat
Topic: Jan van der Steen passed away
Replies: 6
Views: 9592

Jan van der Steen passed away

Jan van der Steen passed away last week at the age of 64. He was active in the go community for over four decades and made it to a 3 dan rank. He was the founder of gobase.org and 321go.org, two sites which helped many people learn the game and get stronger. He will be sorely missed :sad:
by HermanHiddema
Fri Mar 04, 2022 2:08 pm
Forum: European Go Federation Forum
Topic: Pairings against (Belo)russian players
Replies: 6
Views: 14268

Re: Pairings against (Belo)russian players

A player participating in a tournament can know, in advance, what the conditions for participation are. If the tournament requires a statement against the war, they can choose to make that statement or choose not to participate. A player cannot, however, know in advance what conditions other ...
by HermanHiddema
Fri Mar 04, 2022 10:29 am
Forum: European Go Federation Forum
Topic: Pairings against (Belo)russian players
Replies: 6
Views: 14268

Re: Pairings against (Belo)russian players

The EGF meeting has decided that (Belo)russian players may participate in European tournaments under neutral flag.

This gives rise to follow-up questions:

1) In tournaments without flags, does "neutral flag" mean "neutral country in pairing programs, pairings and results?

I guess so.

2) Is it ...
by HermanHiddema
Fri Feb 25, 2022 6:47 am
Forum: Off Topic
Topic: War of aggression that will affect all of us.
Replies: 47
Views: 37179

Re: War of aggression that will affect all of us.

I'm not sure why the top and bottom were cut off, the full version can be seen at: https://www.reddit.com/r/baduk/comments ... emoval_of/
by HermanHiddema
Fri Feb 18, 2022 4:44 pm
Forum: Amateurs
Topic: What is the longest winning sequence ?
Replies: 23
Views: 21288

Re: What is the longest winning sequence ?

lightvector wrote:I seem to remember seeing a construction sort of like this that achieved tens of thousands of moves somewhere on the internet, but it was many years ago and I don't know how to find it again.
I have this one: https://online-go.com/game/41383743
by HermanHiddema
Sat Jan 16, 2021 3:02 pm
Forum: Study Group
Topic: Broken ladder games
Replies: 13
Views: 12510

Re: Broken ladder games

The following is an article from the GoGoD Encylopaedia which lists various interesting ladder situations. The formatting is lost in the transfer here, and you will need the GoGoD database for the games, but I don't think you'll find a bigger XXXX of ladders.

We need a collective noun for ladders ...
by HermanHiddema
Mon Nov 23, 2020 11:54 am
Forum: Professionals
Topic: Fujisawa Rina - First Female Victory in JP Mixed Tourney
Replies: 17
Views: 12583

Re: Fujisawa Rina - First Female Victory in JP Mixed Tourney


Still, I may make Rina's achievement the reason for my annual tot of whisky (outside Hogmanay) tonight. There's not been much else to celebrate this year and it's soon drawing to a close. If others care to join me, shall we say 10pm GMT (23 November)? My own tipple is Dalwhinnie's Winter's Gold ...
by HermanHiddema
Mon Nov 09, 2020 9:07 am
Forum: Study Group
Topic: Derived Metrics for the Game of Go
Replies: 32
Views: 22230

Re: Derived Metrics for the Game of Go


The paper says: "Every move played in a game reduces the number of its future possibilites." Unless a superko or similar rule applies, this is just a conjecture and disproven by this counter-example: White's two-eye-formation fills the board, White fills an eye, Black passes, White fills an eye ...
by HermanHiddema
Sun Nov 01, 2020 7:45 am
Forum: Go Rules
Topic: II. Corona-Cup 2020 Rules
Replies: 41
Views: 38287

Re: II. Corona-Cup 2020 Rules


> it is not a "privately organised event".


Quick correction here: Privately organized means organized by a private entity as opposed to organized by by a public entity (the government).

To quote one definition: "Private entity" means any entity that is not a unit of government, including but ...
by HermanHiddema
Fri Oct 30, 2020 5:08 am
Forum: Go Rules
Topic: strange seki
Replies: 30
Views: 21432

Re: strange seki

I think Bill makes a good point. In theory, to play superko you need to memorize every board position that has occurred in the current game. An easy task for a computer, an impossibility for humans.

So that's not what we do. In practice, we recognize that there a certain patterns that create ...
by HermanHiddema
Thu Oct 01, 2020 1:29 am
Forum: Computer Go
Topic: Go AI World Championship 2020
Replies: 15
Views: 15164

Re: Go AI World Championship 2020

Seems this tournament used a variation of button go.

According to Sensei's Library (https://senseis.xmp.net/?2020WorldArtificialIntelligenceGoCompetition) the scoring rule is:

6. Chinese rules, komi is 3.25 stones but if white passes first it's 3.75.

This is similar to WMSG rules in 2008 (https ...
by HermanHiddema
Wed Sep 16, 2020 1:12 pm
Forum: General Go Chat
Topic: Why do some people stay at the same rank?
Replies: 50
Views: 30997

Re: Why do some people stay at the same rank?

See also pages 6-9 of https://www.yumpu.com/en/document/read/ ... oforbundet. Figure 4 is very close to what gennan is suggesting.
by HermanHiddema
Tue Sep 15, 2020 1:08 pm
Forum: Go Rules
Topic: Martian problem
Replies: 108
Views: 86999

Re: Martian problem

Given how the rules have been applied, the verb "to possess" in the phrase "Stones which are alive but possess dame are said to be in seki." can be concluded to mean:

A stone possesses dame if any stone in the same group (not chain) is adjacent to a dame.