Search found 222 matches

by David Williams
Sun Mar 15, 2020 12:34 pm
Forum: General Chat
Topic: Covid-19 - Suspend Chess Immediately
Replies: 340
Views: 19605

Re: Covid-19 - Suspend Chess Immediately

The difference in 'herd immunity' % lies in the differences in rate (R) of transmission of infection. Where R = 0, there is no transmission; where R = 0.99999, the infection will swiftly die out. But where R = 1.00001, the infection will expand exponentially in due course. So R = 1 is the baseline ...
by David Williams
Sat Mar 14, 2020 2:44 pm
Forum: General Chat
Topic: Covid-19 - Suspend Chess Immediately
Replies: 340
Views: 19605

Re: Covid-19 - Suspend Chess Immediately

The problem with a vaccine isn't so much going to be producing candidates. You're going to be giving the thing to hundreds of millions of people. So you have to test it, and that means really testing it, or you could easily enough end up doing more harm than good. And it's hard enough to get people...
by David Williams
Sat Mar 14, 2020 12:27 am
Forum: General Chat
Topic: Covid-19 - Suspend Chess Immediately
Replies: 340
Views: 19605

Re: Covid-19 - Suspend Chess Immediately

The thing I find hard to visualise here is the end game. Under what circumstances do things start up again? The virus is surely never going to disappear completely. If you've never had it you're always going to be vulnerable to it, and there will always be people out there you can catch it off. Ther...
by David Williams
Sat Jan 11, 2020 4:08 pm
Forum: ECF Matters
Topic: Membership Doppelgangers
Replies: 9
Views: 1136

Re: Membership Doppelgangers

Could you take everyone to the ECF Grading Database search page for their surname, graded and ungraded, and ask "Is any of these people you?" Or even "Are any of these people you?" if it's an ongoing problem!
by David Williams
Fri Mar 29, 2019 5:05 pm
Forum: General Chat
Topic: Is this a win?
Replies: 34
Views: 3196

Re: Is this a win?

All I can say is that I think you did the right thing. You say that in future if you win on time because your opponent is so bone-headed or ignorant of the rules that he doesn't even ask you for a draw, that you will claim the win. Nothing wrong with that in my book, but if my actions have unwitting...
by David Williams
Fri Mar 29, 2019 4:25 pm
Forum: General Chat
Topic: Is this a win?
Replies: 34
Views: 3196

Re: Is this a win?

No, I think I'm trying (and failing?) to make the case that what happened in the actual game was essentially the same thing in terms of its potential effect on the player whose flag fell. A momentary distraction wondering whether he could claim an extra two minutes, and it's too late to claim the dr...
by David Williams
Fri Mar 29, 2019 8:40 am
Forum: General Chat
Topic: Is this a win?
Replies: 34
Views: 3196

Re: Is this a win?

It might not be ethical if that was done on purpose. In my game, I was blitzing moves too - hence not noticing the square was covered. I let go of the piece briefly, instantly realized and instantly moved to a legal square. I didn't gain any benefit. He had 2 seconds or so left, so it changed nothi...
by David Williams
Fri Mar 29, 2019 12:39 am
Forum: General Chat
Topic: Is this a win?
Replies: 34
Views: 3196

Re: Is this a win?

When you reach the situation where one player is massively ahead on material but with virtually no time, the player with no time will be moving instantaneously, often before the other player has pressed his clock. Is it ethical for the player with more time to play an illegal move and not press the ...
by David Williams
Thu Feb 14, 2019 3:32 pm
Forum: General Chat
Topic: Enforcing rules in League chess
Replies: 29
Views: 2310

Re: Enforcing rules in League chess

There are at least some rules which cover these situations, even if their application is not straightforward in league chess. The one I think is more difficult is the last game to finish, in a mutual time scramble, with both teams gathered round the board. And someone points out that a flag has fall...
by David Williams
Fri Jan 25, 2019 12:39 am
Forum: 4NCL
Topic: How Many Times ?
Replies: 13
Views: 2475

Re: How Many Times ?

John Upham wrote:
Thu Jan 17, 2019 10:21 am
Camberley Chess Club has nothing whatsoever to do with Camberley Juniors.
Maybe they should call themselves Spirit of Camberley Juniors.
by David Williams
Wed Jan 23, 2019 3:49 pm
Forum: General Chat
Topic: Incremental controls - the `unlimited` game.
Replies: 39
Views: 3314

Re: Incremental controls - the `unlimited` game.

There was an attempt to introduce it on Merseyside in Div 1 several years back, optional if both teams agreed, to be played on all boards. A couple of teams didn't have digital clocks, and were also unwilling to play it in away games because they would be unfamiliar with it, and therefore at a disad...
by David Williams
Mon Jan 21, 2019 12:31 am
Forum: General Chat
Topic: Todays Chess Quest.
Replies: 20
Views: 1729

Re: Todays Chess Quest.

If Tal and Stein both thought it was a draw when they concocted it, why couldn't they just play it out anyway? The worst that happens is that Tal looks to have missed an opportunity - which he supposedly did anyway when he varied. Do grandmasters really discuss each others games at length while in p...
by David Williams
Thu Dec 13, 2018 8:40 am
Forum: General Chat
Topic: Under promotion to a bishop.
Replies: 21
Views: 2636

Re: Under promotion to a bishop.

Just to put this one to bed. [FEN " 8/p3B2p/1P5P/3P4/5r2/3k4/8/6K1 "] 1. b7 Rg4+ 2. Kf2 Rg8 3. d6 Kc4 4. d7 Kb5 5. d8=Q Rd8 6. Bd8 Ka6 The stalemate position is easy enough for the composer to visualise, but to add just the two h pawns, to leave a position where two dark square bishops win, but one ...
by David Williams
Mon Dec 10, 2018 8:27 pm
Forum: General Chat
Topic: Under promotion to a bishop.
Replies: 21
Views: 2636

Re: Under promotion to a bishop.

Richard Bates wrote:
Mon Dec 10, 2018 3:52 pm
I’m struggling. Is the definitely the correct position?
Yes.
by David Williams
Mon Dec 10, 2018 10:26 am
Forum: ECF Matters
Topic: ECF to scrap its grading system
Replies: 279
Views: 23575

Re: ECF to scrap its grading system

I may be being a bit dense here. Working out the grade of someone who plays more than thirty games a year on December 31, using the current method. Whether you collect the data annually, half-yearly or hourly, the calculation is based on all the games played in the previous twelve months. The more f...