Best Elo for dollar value on single CPU?

[Tony Thomas]

Tony, I am going to sell the next version of DanaSah by 0,99$, I hope to have to you like client.

Pedro

By the way I was only asking for 500 elo/dollar, you gave me a 5 times better deal.

[George Tsavdaris]

If I remember correctly, I paid 19 dollars for Naum 2.2. Ofcourse, I got the previous customer discount.

According to ccrl
Rybka 2.3.2a is rated 3068
Elo/dollar = 3068/41 = 74.83

Naum is rated 2891
Elo/dollar = 2891/19 = 152.16

This ELO/dollar comparison is just wrong.
Since 2 values of ELO between 2 engines, can not be compared linearly by dividing each other, but only by using the subtraction of these 2 ELO values.

What i mean with more simple words is that:
Rybka=3068 and Naum=2891 ELO values are equivalent to:
Rybka=1268 and Naum=1091 ELO values and also equivalent to:
Rybka=268 and Naum=91 ELO values.

So by getting the last one you get:
Rybka 2.3.2a is rated 268
Elo/dollar = 268/41 = 6.5

Naum is rated 91
Elo/dollar = 91/19 = 4.8

So Rybka is better.
Contradiction.

You have to find another valid comparison to take into account both strength and price.

What was the point of the second step?

Your calculation gives the value of elo-2900/dollar not elo/dollar.

No, you don't get it....
Elo and Elo-2900 is exactly the same regarding the strength of 2 engines.
That means elo is still the same elo if we make elo=elo-2900.

[Tony Thomas]

No, you don't get it....
Elo and Elo-2900 is exactly the same regarding the strength of 2 engines.
That means elo is still the same elo if we make elo=elo-2900.

No it isnt. Elo-2800 or whatever the common factor just shows the strength diference between the program. It doesnt show how much elo/dolla you get. Now, help me sell some Naum.
I have 100 dollars and you have 1000 dollars

is not the same us

me having 1 dollar and you having 901 dollars.

[George Tsavdaris]

No, you don't get it....
Elo and Elo-2900 is exactly the same regarding the strength of 2 engines.
That means elo is still the same elo if we make elo=elo-2900.

No it isnt. Elo-2800 or whatever the common factor just shows the strength diference between the program. It doesnt show how much elo/dolla you get.

You are simply wrong....

Now, help me sell some Naum.
I have 100 dollars and you have 1000 dollars

is not the same us

me having 1 dollar and you having 901 dollars.

Yes it is not the same.
I didn't say anything about dollars, but only about elo/dollars that it is a wrong quantity to measure the price per strength for 2 engines.....

[Tony Thomas]

Yes it is not the same.
I didn't say anything about dollars, but only about elo/dollars that it is a wrong quantity to measure the price per strength for 2 engines.....

You got hurt when I took away your money eh? I like to twist math to help others, you are doing the exact opposite. I actually didnt win the arguement because only previous customers get the most elo/dollar deal. I got the deal, most others probably cant get it.

[Ovyron]

If you applied the most elemental maths, you will see that any freeware, strong engine, gives infinite value for his Elo.

No, x/0 != ∞

Division by zero = undefined.

To understand this, I'll give an example. Imagine you have a magic box that vanishes every apple you put inside, now division by zero asks "How many apples do you need to fill this box?", and the answer is undefined, because no matter how many apples you put inside, they'll all disappear. Not even infinite apples will do, as all of them will disappear.

[fern]

Ulyses, do not take kind of literary metaphor clothed as math as a real math statement.
My best
Fernando

[ArmoredGuns]

Ulyses, do not take kind of literary metaphor clothed as math as a real math statement.
My best
Fernando

Fernando,

What's your book about? I'm latin, so i'm interested to know...

[Lion]

All free engines have the same ratio so are as good as Rybka 1.0 x64

[naum]

Hi Tony,

You can expect a significant price drop if you stick with the single CPU.
I already decided to change my pricing. Those who are on a tight budget or have only a single CPU machine (indicating comp chess is just a hobby for them) shouldn't be paying high prices.
Price of the MP version will change from release to release, because it depends on the estimated ELO increase.

Regards,
Alex