Author: Eelco de Groot
Date: 08:09:05 08/16/00
Go up one level in this thread
On August 12, 2000 at 15:32:12, Peter Ackermann wrote:
>Hello!
>
>I have found the two BT (Bednarz-Toniessen) -Tests but was unable how to convert
>the "needed time" in a ELO-number! Anyone who can give me the two required
>formulas ! (I have the positions already!)
>
>Thank you!
>
>Peter
Peter I think I have a possible answer, if these are the BT tests you are
referring to. Found formulas in a saved Rebel 10 Frequently Asked Questions
List. Maybe you could ask at the CSS site if you need more info, I believe they
have a forum there. See Frederic Friedel's message
http://www.icdchess.com/forums/1/message.shtml?124662 how to get to that site.
Regards, Eelco
From Rebel 10 FAQ:
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3.5. Using the BT2450, BT2630 and BS2830 Rebel Databases
Part of the Rebel 10.0 release are the Rebel databases BT2450 and BT2630. This
databases contain the positions of the BT2450 and BT2630 test suites. This test
suites are designed by Hubert Bednorz and Fred Toennissen for measuring the
tactical capabilities of chess engines. BT2630 is the predecessor of BT2450.
Each test suite contain 30 positions. Select each position and let Rebel think
for 15 minutes (900 seconds). If a position is solved, write down its solution
time in seconds. It doesn't count as a solution if Rebel finds, the move and
then changes its mind. If after finding a move, then changing its mind, then
finding it again, you should use the last time found. Any solution that is not
found, score as 900 seconds. Add up all the times, divide by 30 and subtract the
result from either 2630 or 2450. The final figure is Rebel's (BT-) ELO rating.
The new BS2830 (Bednorz-Schumacher) test suite can be downloaded from the Rebel
10 subscription aera. This suite is designed for programs, with an expected
SSDF-ELO rating of 2300 or higher. The test suite contain 27 positions. Select
each position and let Rebel think for 15 minutes. If a position is solved, write
down its solution time in minutes. It doesn't count as a solution if Rebel
finds, the move and then changes its mind. If after finding a move, then
changing its mind, then finding it again, you should use the last time found.
Any solution that is not found, score as 15 minutes. Add up all the times (in
minutes) to the total time TT (in minutes). You get the (BS-) ELO rating with
the following formula (updated in CSS 2/1998):
BS2830-ELO = 2830 - TT/1.5 - (TT * TT)/(22 * 22)
Be aware, that the authors changed the formular in April 1998. The older
formular (CSS 4/97) was
BS2830-ELO = 2830 - (TT * TT)/(17 * 17)
So all older results must be recalculated.
Be cautious in interpreting the BT/BS results. The BT/BS values are only
indicators for the tactical strenght of a chess engine. You can't measure the
positional strength of a chess engine with this test suites.
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