Search found 439 matches

by Brian Valentine
Thu Apr 25, 2019 12:12 pm
Forum: Seniors Chess
Topic: World Senior Team Championships Rhodes 2019
Replies: 85
Views: 6203

Re: World Senior Team Championships Rhodes 2019

Hi David,

I was there to applaud his achievement! I'm sure at the least, photographs will appear in due course. I suspect that the criteria for board 5 awards included something lower than seven games.
by Brian Valentine
Thu Apr 25, 2019 12:27 am
Forum: Seniors Chess
Topic: World Senior Team Championships Rhodes 2019
Replies: 85
Views: 6203

Re: World Senior Team Championships Rhodes 2019

Mick Norris wrote:
Wed Apr 24, 2019 3:08 pm
That's an amazing result for the 65+ team

Board prizes - silver for Keith, gold for John Emms, gold for Tony Stebbings, bronze for Ian Snape
And bronze for Brian Hewson
by Brian Valentine
Thu Mar 28, 2019 4:59 pm
Forum: Seniors Chess
Topic: English Seniors 2019
Replies: 21
Views: 2752

Re: English Seniors 2019

I suppose there's a good reason to get the old 'uns champions settled in very early for the 2019-20 season.
by Brian Valentine
Thu Mar 28, 2019 4:03 pm
Forum: General Chat
Topic: Does university chess exist in a different (and better) world?
Replies: 28
Views: 2043

Re: Does university chess exist in a different (and better) world?

You need to be careful with the treatment of F-grades. Your percentages give the perception of solid growth whereas most of the average (21-19=) 2%pa growth is explained by giving F category players a grade in 2015. Category F is also the source of many leavers. I doubt if any of this alters your an...
by Brian Valentine
Thu Mar 28, 2019 1:23 pm
Forum: General Chat
Topic: Does university chess exist in a different (and better) world?
Replies: 28
Views: 2043

Re: Does university chess exist in a different (and better) world?

I haven't done an age analysis like Angus', but I would add a word of warning. When looking at grades from longer periods there are a surprising number of "rentries". These players leave the list in one period only to reenter after a period. Over the period 2009-19 (using only July lists) over 3500 ...
by Brian Valentine
Fri Mar 15, 2019 1:28 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

Hello Brian I've only just started reading this stuff. If you are going ELO type, how do you plan to ensure consistency across junior grades where some play a high proportion of adults and others play a much smaller proportion of adults? I'm not exactly sure of the problem you are concerned about. ...
by Brian Valentine
Fri Mar 15, 2019 1:13 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

The February update was published on 5th February. LOL. He means the update due on Feb 29th And when is it appearing, please? If ever....... If things go well over the weekend, then I expect the March update to be published in the first half of next week. The plan is to move back to month end updat...
by Brian Valentine
Thu Mar 14, 2019 11:27 am
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

.......There is no ground swell opinion for either changing to monthly updates or a system that is incomprehensible to the majority of players. You don't see the correspondence I deal with on the current approach! The junior algorithm is particularly difficult. The timetable for submission is not s...
by Brian Valentine
Sat Mar 09, 2019 3:58 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

The February update was published on 5th February.
by Brian Valentine
Wed Mar 06, 2019 7:51 am
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

There is no schedule to change the six monthly cycle.

It will remain in place until there is a stable robust alternative. That alternative will include simplification of result submission, even though we haven't yet sorted out what that might be.

Brian Valentine
Manager of ECF grading
by Brian Valentine
Tue Mar 05, 2019 1:44 pm
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

"After spending many months looking at the data, I think the hypothesis that juniors tend to improve is conclusively proved against the alternate that playing strength is constant." Are you sure? .... Being sure is not a concept fitting with statistics theory! It is clear from both senior and junio...
by Brian Valentine
Tue Mar 05, 2019 8:09 am
Forum: Grading Debate
Topic: ECF Grading Proposals
Replies: 210
Views: 14678

Re: ECF Grading Proposals

The k factor will be 20 except that in a month where a junior player has outperformed expectation, then the k factor will be 40. My impression based on a few seconds of mental arithmetic is that a junior whose playing strength is constant and who plays ten games each month might be expected to gain...
by Brian Valentine
Sun Feb 24, 2019 4:36 pm
Forum: ECF Matters
Topic: ECF to scrap its grading system
Replies: 279
Views: 18967

Re: ECF to scrap its grading system

In most circumstances, one thing that reduces volatility is simply by increasing frequency of lists while not changing the k-factor.
by Brian Valentine
Tue Feb 12, 2019 9:15 am
Forum: ECF Matters
Topic: ECF to scrap its grading system
Replies: 279
Views: 18967

Re: ECF to scrap its grading system

I have placed a proposal for monthly grading on the main ECF website under grading matters. I intend to begin an FAQ document today.
by Brian Valentine
Sun Feb 10, 2019 5:16 pm
Forum: ECF Matters
Topic: ECF to scrap its grading system
Replies: 279
Views: 18967

Re: ECF to scrap its grading system

While I normally try to refrain from being critical of volunteers who do their best in sometimes challenging circumstances, I really do think the consultation on grading changes circulated with the latest ECF newsletter is wholly inadequate. I've had experience of a number of consultation exercises...