Search found 222 matches

by David Williams
Thu Apr 08, 2010 2:21 pm
Forum: General Chat
Topic: Adjournments and Adjudication
Replies: 149
Views: 8760

Re: Adjournments and Adjudication

I've played a lot of chess as a relatively high-graded player in the lower divisions of my league. When adjudication was the order of the day I hated it, and was an advocate of quick-play finishes, for all the usual reasons. Then we changed to QPF - and I became a fan of adjudication. Previously the...
by David Williams
Sat Mar 06, 2010 10:30 am
Forum: General Chat
Topic: Mobile phone penalties.
Replies: 77
Views: 10369

Re: Mobile phone penalties.

Two thoughts. Firstly, in league chess I've heard mobile phones go off a few times, but I've never seen anyone lose a game because of it. Perhaps as a result, it seems to be happening more frequently. Why bother switching off if nothing's going to happen to you? So the draconian penalty has a counte...
by David Williams
Fri Feb 26, 2010 5:48 pm
Forum: General Chat
Topic: League Rules regarding Board order by ECF rating
Replies: 83
Views: 9240

Re: League Rules regarding Board order by ECF rating

What is the biggest gap between grades of opponents in a league? I offered Joe French (108) v Shaun Taulbut (232), a game from the Berks League in the 80s. Shaun was very nice about it. As mentioned earlier in this thread, in the Merseyside League two years ago Bryan Simm (77) stood in against Nige...
by David Williams
Mon Feb 22, 2010 1:45 pm
Forum: General Chat
Topic: League Rules regarding Board order by ECF rating
Replies: 83
Views: 9240

Re: League Rules regarding Board order by ECF rating

So long as the board order does not create mismatches where there is a gap of more than 40 BCF grading points, you can play in any order you like without altering the expected result. Playing a weak player on a high board reduces his expected score by exactly the same as the sum of the increased ex...
by David Williams
Mon Feb 22, 2010 10:13 am
Forum: General Chat
Topic: League Rules regarding Board order by ECF rating
Replies: 83
Views: 9240

Re: League Rules regarding Board order by ECF rating

So long as the board order does not create mismatches where there is a gap of more than 40 BCF grading points , you can play in any order you like without altering the expected result. Playing a weak player on a high board reduces his expected score by exactly the same as the sum of the increased e...
by David Williams
Sat Feb 13, 2010 8:51 pm
Forum: General Chat
Topic: League Rules regarding Board order by ECF rating
Replies: 83
Views: 9240

Re: League Rules regarding Board order by ECF rating

That's true, but you need to allow for there only being three possible results in each game. For example, in a 5 board match, the players are graded: Team A Team B 200 190 180 170 160 150 140 130 120 110 The expected match score is 3-2 to Team A, but the advantage on each board is only 10 points, s...
by David Williams
Sat Feb 13, 2010 8:10 pm
Forum: General Chat
Topic: League Rules regarding Board order by ECF rating
Replies: 83
Views: 9240

Re: League Rules regarding Board order by ECF rating

So long as the board order does not create mismatches where there is a gap of more than 40 BCF grading points, you can play in any order you like without altering the expected result. Playing a weak player on a high board reduces his expected score by exactly the same as the sum of the increased exp...
by David Williams
Mon Feb 08, 2010 5:05 pm
Forum: General Chat
Topic: Mobile Phone problems at local league level.
Replies: 288
Views: 18111

Re: Mobile Phone problems at local league level.

One often reads of a golfer committing some seemingly trivial offence, maybe known only to himself. But on discovering what he has done, he will immediately accept the appropriate penalty, including disqualifying himself. Snooker players call fouls against themselves. They do not wait to see if thei...
by David Williams
Thu Sep 03, 2009 8:47 pm
Forum: General Chat
Topic: Blitz : Opponents moving in your time !
Replies: 44
Views: 4988

Re: Blitz : Opponents moving in your time !

A player must always be allowed to stop his clock. The time between making the move on the chessboard and stopping his own clock and starting his opponent‘s clock is regarded as part of the time allotted to the player. If you cannot move until your opponent has pressed his clock, what is the sign...
by David Williams
Fri Aug 21, 2009 11:57 pm
Forum: Grading Debate
Topic: The 40-point rule
Replies: 13
Views: 2079

Re: The 40-point rule

I thought the idea of a grading system was to give some idea of players' strength, not to incentivise them to play. If a 145 player needs to score 90% against a 105 to maintain his grade, and a 105 needs to score 90% against a 65 to do likewise, shouldn't the 145 need to do rather better against the...
by David Williams
Fri Apr 17, 2009 1:03 pm
Forum: Grading Debate
Topic: GRADING ANOMALIES
Replies: 565
Views: 79550

Re: GRADING ANOMALIES

I freely admit to not having studied this at all, but as I understand it there is a problem, and the evidence is that a gap of 10 grading points produces a 58% result rather than the expected 60%. I don't see why this is evidence of anything. If A and B play only each other, and A wins 60%, their gr...
by David Williams
Mon Mar 30, 2009 8:25 pm
Forum: Chess Questions
Topic: 2 knights v pawn
Replies: 17
Views: 3658

Re: 2 knights v pawn

My copy of Edward Lasker's 'Modern Chess Strategy", published in 1951, shows a mate with a brief explanation of the general method in the chapter 'Elementary End Games' (sic). I know I was aware of it as an unremarkable schoolboy. I once had a ending of two knights and a rooks pawn against knight an...