2010-2011 Grades?

General discussions about ratings.
Simon Dixon
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Re: 2010-2011 Grades?

Post by Simon Dixon » Tue Jul 19, 2011 5:59 pm

Alex Holowczak wrote:
Simon Dixon wrote:
175*8+2*150-50*10= 1200/10=120
175*8+2*150-50*10=1650/10=165
No, 175*8+2*150-50*10=1200
Ok lets break it down,
175*8 =1400 2*150 = 300 - 50 = 250 *10 =2500. 1400 + 2500 = 3900/10 = 390 yikes, oh lordy lordy I suppose it is still wrong. :)

390 ECF :mrgreen:

Roger de Coverly
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Re: 2010-2011 Grades?

Post by Roger de Coverly » Tue Jul 19, 2011 6:06 pm

E Michael White wrote:Roger
I read it that:- If all the opponents of an ungraded player are graded the results don’t go through step 2 but the "starting grade" is fed into the "grading proper".
That actually makes sense as 10% and below or 90% and higher scores are presumably not uncommon, whilst really strange grades relatively infrequent. I think the investigations of two years ago seemed to indicate that you also needed a fellow ungraded player to get the instability. Examples of relatively low graded player in opens are quite common. Whilst it can be good for their experience, whether it's good for their grade is unclear. So the example of playing 4@175 and 1@150 is likely.

In terms of the arithmetic, if you play 4*175 and 1*150, that's 850 points. Double it for two tournaments and that's 1700. So if you scored 50%, your performance grade would be 170. If you score 8 losses and 2 draws, you subtract eight fifties, so 400. Thus your performance is 130. Lose all ten and the performance is 120. That's ignoring the 40 point rule of course.

Alex Holowczak
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Re: 2010-2011 Grades?

Post by Alex Holowczak » Tue Jul 19, 2011 6:17 pm

Simon Dixon wrote:Ok lets break it down,
175*8 =1400 2*150 = 300 - 50 = 250 *10 =2500. 1400 + 2500 = 3900/10 = 390 yikes, oh lordy lordy I suppose it is still wrong. :)

390 ECF :mrgreen:
Oh, the importance of BIDMAS. :wink:

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Carl Hibbard
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Re: 2010-2011 Grades?

Post by Carl Hibbard » Tue Jul 19, 2011 6:32 pm

Alex Holowczak wrote:Oh, the importance of BIDMAS. :wink:
BODMAS?
Cheers
Carl Hibbard

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IM Jack Rudd
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Re: 2010-2011 Grades?

Post by IM Jack Rudd » Tue Jul 19, 2011 6:55 pm

Carl Hibbard wrote:
Alex Holowczak wrote:Oh, the importance of BIDMAS. :wink:
BODMAS?
Either is correct. There are a whole load of things whose priority is after brackets and before division.

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Carl Hibbard
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Re: 2010-2011 Grades?

Post by Carl Hibbard » Tue Jul 19, 2011 7:39 pm

I was taught the first a very long time ago so naturally mine is probably right?
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Carl Hibbard

Alex Holowczak
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Re: 2010-2011 Grades?

Post by Alex Holowczak » Tue Jul 19, 2011 7:57 pm

Carl Hibbard wrote:I was taught the first a very long time ago so naturally mine is probably right?
In BODMAS, the O stands for Order. At primary school, we were showed it stood for pOwers. Well, I did go to primary school in Sandwell...

In BIDMAS, the I stands for Indices. I thought that was a better fit, personally, so switched to BIDMAS.

My world was shattered when at secondary school I had the Eureka moment that D and M were exactly the same operation. The realisation that A and S were the same operation followed almost immediately. I couldn't take BIDMAS seriously after that. :(

Nicky Chorley
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Re: 2010-2011 Grades?

Post by Nicky Chorley » Tue Jul 19, 2011 8:01 pm

I was taught it as "BODMAS".

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Carl Hibbard
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Re: 2010-2011 Grades?

Post by Carl Hibbard » Tue Jul 19, 2011 8:21 pm

Nicky Chorley wrote:I was taught it as "BODMAS".
Yes, kids of today what can you say...
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Carl Hibbard

Richard Bates
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Re: 2010-2011 Grades?

Post by Richard Bates » Tue Jul 19, 2011 9:01 pm

Bless my dear Aunt Sally.

John Hickman
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Re: 2010-2011 Grades?

Post by John Hickman » Tue Jul 19, 2011 9:03 pm

Merry BIDMAS everybody

Simon Dixon
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Re: 2010-2011 Grades?

Post by Simon Dixon » Wed Jul 20, 2011 10:14 am

I think I was too busy reading the Beano.