Search found 434 matches

by Brian Valentine
Thu Jun 14, 2018 2:08 pm
Forum: ECF Matters
Topic: British championship grading sections in the main event
Replies: 101
Views: 9489

Re: British championship grading sections in the main event

With rating prizes being calculated using W-We, it is important that players ratings are an accurate reflection of their playing ability. The problem now faced is what happens when you combine a membership structure designed to discourage FIDE rated chess with national competitions based on FIDE ra...
by Brian Valentine
Wed May 23, 2018 11:06 am
Forum: International News
Topic: Ontario Open
Replies: 6
Views: 924

Re: Ontario Open

The US rating committee use the conversions

US= 20+1.02FIDE and US=1.1C-240 to initialise ratings for those new to US chess with alternative ratings (>2000). So Canadian ratings are considered to be .927FIDE+236, so FIDE 2150 would be about 2230 Canadian.
by Brian Valentine
Fri May 18, 2018 10:55 am
Forum: General Chat
Topic: A level maths question
Replies: 33
Views: 3305

Re: A level maths question

When Alex teaches his beginners and is asked who is winning, I hope he doesn't advocate getting out the calculator on their mobile phone to add up each set of points on taken pieces. I fear this strategy might foul up somehow.
by Brian Valentine
Sat Apr 14, 2018 6:55 pm
Forum: ECF Matters
Topic: ECF Finance meeting 2018
Replies: 392
Views: 25447

Re: ECF Finance meeting 2018

[/quote] So tell me why, if I want to subscribe to an organisation that will use my money to promote chess, that organisation should be the ECF rather than the 4NCL or the UK Chess Challenge? The organisers of, respectively, the main adult tournament and the main kids' tournament? Why is it only the...
by Brian Valentine
Wed Apr 11, 2018 2:51 pm
Forum: General Chat
Topic: Tournament Structures
Replies: 135
Views: 8521

Re: Tournament Structures

I'm not sure that I understand the underlying assumptions in either Alex's or Chris' thinking, so I'll pitch in to see whether we can get to the bottom of it. I think Alex is assuming that the seeding is correct. I can't see how his routes can be otherwise derived. I doubt correct ranking is possibl...
by Brian Valentine
Mon Feb 26, 2018 8:24 pm
Forum: Congress Diary
Topic: 62nd Southend Congress 30 March-2 April 2018
Replies: 3
Views: 664

Re: 62nd Southend Congress 30 March-2 April 2018

Is there a British qualifying place available?
by Brian Valentine
Thu Feb 22, 2018 2:53 pm
Forum: International News
Topic: Northumbria Masters
Replies: 57
Views: 5199

Re: Northumbria Masters

The FIDE implementation of Elo lacks what many national systems were forced to adopt, namely a reboot rule. And will continue to lack it. There is an effective reboot rule, since if eighteen games are played in one rating period it does reboot ( for young players ) and if they are played over a few...
by Brian Valentine
Thu Feb 15, 2018 7:50 am
Forum: Grading Debate
Topic: New Grade/Age Categories
Replies: 37
Views: 4378

Re: New Grade/Age Categories

Your numbers are correct when looking at ENG players only. When looking at all players, player #100 is graded 255. (There are a lot of foreign players with very high grades based on Gibraltar and the Isle of Man.) Right. Thanks for that clarification. It explains (I think) my incredulity that we (i...
by Brian Valentine
Wed Feb 14, 2018 12:16 pm
Forum: Grading Debate
Topic: New Grade/Age Categories
Replies: 37
Views: 4378

Re: New Grade/Age Categories

I'm glad I kept my working!

Row #
180 429
190 302
200 196
210 147
220 91
230+ 276
Grand Total 1441
by Brian Valentine
Tue Feb 13, 2018 11:01 pm
Forum: Grading Debate
Topic: New Grade/Age Categories
Replies: 37
Views: 4378

Re: New Grade/Age Categories

This is the information Neil asked for. This based on all players category A-E included in the January list. The first column is the lowest grade in the group. The first and last are <100 and >190
Row #
90 2404
100 819
110 918
120 971
130 980
140 829
150 813
160 672
170 571
180 1441
Grand Total 10418
by Brian Valentine
Mon Jan 29, 2018 5:24 pm
Forum: International News
Topic: Tradewise Gibraltar Festival 2018
Replies: 142
Views: 12217

Re: Tradewise Gibraltar Festival 2018

I don't know how pertinent it is to the bye in question, but Gibraltar has been gridlocked all day. Travel is very difficult. This morning it was scaffolding collapsing into a roadway, which may or may not be fixed, but the main bus route was affected. However this pm there has been a rockfall on th...
by Brian Valentine
Sun Dec 31, 2017 5:09 pm
Forum: Grading Debate
Topic: Average of all graded players in the UK
Replies: 7
Views: 1937

Re: Average of all graded players in the UK

As resident ECF grading stats geek, I rise to the challenging examination paper set by Adam. I do this reluctantly because the grading system is fragile, although the numbers appear robust. So, to keep the caveats short, I’ll point out that 12.5% 0f the January List of categorised players were not i...
by Brian Valentine
Mon Nov 27, 2017 7:16 pm
Forum: Grading Debate
Topic: To grade or not to grade
Replies: 39
Views: 4385

Re: To grade or not to grade

The situation is thus. The grader should seek advice from higher authority. If the organiser/arbiter/league committee are satisfied that a game has been played under ECF tournament rules, then they can instruct the grader to submit the result for grading. It will then be graded. The "organisers" sho...
by Brian Valentine
Mon Jul 31, 2017 8:13 am
Forum: Grading Debate
Topic: July Grades
Replies: 60
Views: 10443

Re: july grades

I think Martin is on the right track, but what he states is difficult to test. Since the correction the average grade of categories A-E has been fairly stable. In 2009 it was 133.7 and in the July list it comes out at 132.8. The average for F grades is somewhat lower. The proportion of players rated...
by Brian Valentine
Fri Jun 30, 2017 8:41 pm
Forum: ECF Matters
Topic: ECF LMS
Replies: 12
Views: 2278

Re: ECF LMS

Nick,
Follow the link in Carl's original post above.