Search found 344 matches

by Chris Goodall
Thu Sep 19, 2019 6:02 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

It is not that the ECF hasn't considered a (30 result) moving average model, it is that an Elo system (amongst several) is statistically superior (especially for recreational chess). Also you seem to miss two key requirements given to us by the Board: 1. Players should receive a grade (of some reli...
by Chris Goodall
Thu Sep 19, 2019 3:20 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

Mick Norris wrote:
Thu Sep 19, 2019 3:17 pm
There would be GDPR (data protection) issues here; my club members agree to their data being shared with the leagues they enter, and the ECF, but not with anyone else
They don't need to share any data. Results of chess games are a matter of public record.
by Chris Goodall
Thu Sep 19, 2019 3:12 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

Repost: The move to monthly and four-digit grading seems to be proceeding; I wish Brian Valentine and others the best of luck in making both work with minimal inconvenience to graders and organisers. I will press ahead with WikiGrades. I've now checked the 155 "Leagues etc" from the grading list, no...
by Chris Goodall
Thu Sep 19, 2019 12:00 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

Has someone turned off the internet in Devon? That's... not actually too far from the truth. Results used to be posted on the WECU/DCCA site. Unfortunately, this was Bill Frost's personal project, and when he died, there was no way for anyone to carry on updating it. Um... admins? I didn't write th...
by Chris Goodall
Tue Sep 17, 2019 9:28 pm
Forum: Chess History
Topic: British Champions in Prison
Replies: 24
Views: 1152

Re: British Champions in Prison

JustinHorton wrote:
Tue Sep 17, 2019 9:03 pm
There is an offence of wasting police time, and perhaps there should be one of wasting other posters' time as well
If it becomes unbearable, I will let you know.
by Chris Goodall
Tue Sep 17, 2019 8:39 pm
Forum: General Chat
Topic: Chess talent
Replies: 5
Views: 475

Re: Chess talent

You put a white knight on a1 and black pawns on c3, f3, c6 and f6, and time how long it takes them to move the knight to every square around the edge of the board in turn, without capturing or being attacked by any of the pawns. If it's under 2 minutes, they have chess talent. If it's over 2 minutes...
by Chris Goodall
Tue Sep 17, 2019 7:03 pm
Forum: Chess History
Topic: British Champions in Prison
Replies: 24
Views: 1152

Re: British Champions in Prison

and people had made detailed and credible allegations years before) Detail is cheap. Carl Beech's allegations were detailed. They were lurid, which is not the same thing. Indeed. And also detailed. If you were better than the police at spotting credible allegations, word would have gotten out and t...
by Chris Goodall
Tue Sep 17, 2019 5:07 pm
Forum: Chess History
Topic: British Champions in Prison
Replies: 24
Views: 1152

Re: British Champions in Prison

Matt Mackenzie wrote:
Tue Sep 17, 2019 1:50 pm
and people had made detailed and credible allegations years before)
Detail is cheap. Carl Beech's allegations were detailed. If you were better than the police at spotting credible allegations, word would have gotten out and the police would have offered you a job.
by Chris Goodall
Tue Sep 17, 2019 3:09 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

What we're talking about is just the overfitting problem, yes? Because having your historical data confiscated doesn't make you more likely to overfit that historical data. I would have thought the exact opposite was true! If you can boil the trend down to a single number that represents the improvi...
by Chris Goodall
Tue Sep 17, 2019 1:29 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

It doesn't matter when you played the games. Which is the reason it won't solve one of the major problems that grading and rating systems struggle with, namely a reliable treatment of players who have improved considerably. The speedometer in your car shows you the speed you're going this instant. ...
by Chris Goodall
Tue Sep 17, 2019 10:00 am
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

Good luck coping with reassinging the date, geographic area etc of an incorrectly entered tournament once its stuck on an immutable chain :) Don't need to. All that metadata wouldn't live in the ledger. You'd have a wiki page for the tournament that could hold whatever metadata you wanted, and it w...
by Chris Goodall
Mon Sep 16, 2019 9:20 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 186
Views: 12647

Re: ECF Grading Proposals

Advantages or alleged advantages of monthly grading: - online results are instant, after each game, so it makes sense for ECF grades to move in this direction (but why not go the whole hog and have the Yorkshire 'Chessnuts' daily experience?) I've been wondering that. The great thing about monthly ...
by Chris Goodall
Mon Sep 16, 2019 5:06 pm
Forum: Chess History
Topic: British Champions in Prison
Replies: 24
Views: 1152

Re: British Champions in Prison

JustinHorton wrote:
Mon Sep 16, 2019 4:21 pm
Well maybe, but in the absence of recorded statements by identifiable people, rumours don't actually tell us anything.
I don't have anonymous sources. I know exactly who my sources are. It's everyone else's sources that are anonymous :roll:
by Chris Goodall
Sun Jun 03, 2018 6:02 pm
Forum: International News
Topic: Chess in Iran
Replies: 71
Views: 5217

Re: Chess in Iran

Suppose I'm a 2300-rated Israeli FM. I enter a nine-round open; I have a TPR of 2450 after five rounds. In round 6, I get paired against some Iranian who refuses to play me. All of a sudden, through no fault of my own, my norm chances are gone. You'd be in the same position as if your opponent fail...
by Chris Goodall
Sun Jun 03, 2018 1:50 pm
Forum: International News
Topic: Chess in Iran
Replies: 71
Views: 5217

Re: Chess in Iran

In the case of Iran & Israel it is clear that the motivation behind the boycott is not to gain a competitive advantage. Whether a competitive advantage is even obtained is debatable, and at best marginal. It is not the decision of the Iranian players, but is forced upon them by their government. Su...