WBEC Ridderkerk new results.

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WBEC Ridderkerk new results.

Postby Leo Dijksman » 30 Apr 2004, 16:29

Geschrieben von:/Posted by: Leo Dijksman at 30 April 2004 17:29:27:

Premier Division:
Round 9:
Amyan 1.593b 1010 2.0/4
Nejmet 3.07 0101 2.0/4
------------------------------------
Aristarch 4.41 1100 2.0/4
LittleGoliath 3.9po 0011 2.0/4
------------------------------------
GreenLightChess 3.00 1½½½ 2.5/4
Crafty 19.12 0½½½ 1.5/4
------------------------------------

2nd Division:
Round 10:
Movei 0.08.178d 10½1 2.5/4
Arasan 7.4 01½0 1.5/4
------------------------------------
Gothmog 0.4.7 1011 3.0/4
Betsy 6.51 0100 1.0/4
------------------------------------
Chezzz 1.0.3 1½1½ 3.0/4
Cerebro 1.24 0½0½ 1.0/4
------------------------------------

4th Division:
Round 16:
Gerbil 0.2 101½ 2.5/4
Gully 2.15 pl10 010½ 1.5/4
------------------------------------
ZZZZZZ 6.421 ½011 2.5/4 = Curious position now, Djinn is at rank 1 but if ZZZZZZ scores 2 points or
Djinn 0.849 ½100 1.5/4 = better in the last round Djinn needs to score at least a 1/2 point more!
------------------------------------
OliThink 4.1.1 0011 2.0/4
GreKo 2.71 1100 2.0/4
------------------------------------
Celes 0.78 wbec7 - Fortress 1.62 1-0 = 3 games to go!
------------------------------------

Crosstables and pgn on the WBEC homepage.
Enginelist, latest updates/new engines:
30/04/2004:
Updated: Nesik v0.5.0
Best wishes,
Leo.


WBEC Ridderkerk homepage.
Leo Dijksman
 

S-B possibilities in Div 4 (long)

Postby Norm Pollock » 01 May 2004, 02:30

Geschrieben von:/Posted by: Norm Pollock at 01 May 2004 03:30:25:
Als Antwort auf:/In reply to: WBEC Ridderkerk new results. geschrieben von:/posted by: Leo Dijksman at 30 April 2004 17:29:27:
------------------------------------
ZZZZZZ 6.421 ½011 2.5/4 = Curious position now, Djinn is at rank 1 but if ZZZZZZ scores 2 points or
Djinn 0.849 ½100 1.5/4 = better in the last round Djinn needs to score at least a 1/2 point more!
------------------------------------
The situation is very complicated. It's like the election in Florida. Leo's point that Djinn needs to score at least a 1/2 point more than ZZZZZZ if ZZZZZZ scores 2 points or more is not complete. Actually if ZZZZZ and Djinn each score 1 1/2 points then ZZZZZ would be temporarily ahead in S-B points pending the results of other games. I'll give it a go because I like doing this type of stuff although I don't expect anyone else to be interested.
An engine gets 1 S-B point for each victory obtained by an engine it defeated. So for example, since Djinn defeated Asterisk 4-0-0, each win by Asterisk will give Djinn 4 points (1 for each win by Djinn over Asterisk). Another example, since Djinn had 2 wins, 1 draw and 1 loss to Greko, each win by Greko will give Djinn 2 1/2 S-B points. A draw would be half, so each draw by Asterisk will give Djinn 2 S-B points, and each draw by Greko will give Djinn 1 1/4 S-B points.
Now getting back to Division 4. As it stands now with 4 games remaining for each, Djinn and ZZZZZ are tied in points with Djinn ahead by 25 1/2 S-B points. If Djinn and ZZZZZ remain tied in points after the remaining 4 games each, the S-B points will determine the winner. It would seem that Djinn's lead by 25 1/2 S-B points should hold up. But that is not likely because Djinn is playing 4 games against Gully who only has 21 points, while ZZZZZ is playing 4 games against Greko who has 39.5 points.
Suppose Djinn and ZZZZZ each win 3 games out of their remaining 4. Djinn's S-B will increase 3 times 22 + 1 times 2 1/2 (for Greko's win and because Djinn had 2 wins, 1 draw and 1 loss against Greko) for 68 1/2 S-B points, while ZZZZZ's will increase 3 times 40.5 plus 1 times 4 (for Gully's win because ZZZZZ defeated Gully 4-0-0) for 125 1/2 points. Therefore ZZZZZ will gain 57 S-B points on Djinn. That will wipe out Djinn's current lead of 25 1/2 S-B points.
But that's not the end of it. The other 14 engines will cause changes in the S-B points. For example since Djinn beat Asterisk 4-0-0, Djinn will get 16 S-B points if Asterisk wins its last 4 games, while ZZZZZ would only get 8 points because ZZZZZ had 2 wins and 2 loses against Asterisk. So if Asterisk wins all 4 remaining games, Djinn would gain 8 S-B points relative to ZZZZZ.
So the results of the other 14 engines outside of Djinn-Gully and ZZZZZ-Greko will influence the final S-B results. But practically speaking if ZZZZZ wins 3 out of 4 from Greko it is almost certain to win unless Djinn wins at least 3 1/2 out of 4 from Gully.
Let's look at the situation if each wins 2 1/2 points against their final opponent. Djinn would gain 2 1/2 times 22 1/2 plus 1 1/2 times 2 1/2 for a total of 56 1/4 + 3 3/4 = 60 S-B points. ZZZZZ would gain 2 1/2 times 41 plus 1 1/2 times 4 for a total of 102.5 + 6 = 108.5 S-B points. Therefore ZZZZZ would gain 48.5 S-B points on Djinn excluding results of other games. That would wipe out Djinn's current lead of 25 1/2 S-B points. But with a lead of 23 1/2 S-B points, it is still slightly possible for Djinn to win because of other results.
Let's look at the situation if each wins 2 points against their final opponent. Djinn would gain 2 times 23 plus 2 times 2 1/2 for a total of 46 + 5 = 51 S-B points. ZZZZZ would gain 2 times 41.5 plus 2 times 4 for a total of 83 + 8 = 91 S-B points. That would still overtake Djinn's lead of 25.5 S-B points but would be so narrow (15 1/2 S-B points) that other results could determine the winner.
Let's look at the situation if each wins 1 1/2 points against the final opponent. Djinn would gain 1 1/2 time 23 1/2 plus 2 1/2 time 2 1/2 for a total of 35 1/4 + 6 1/4 = 41 1/2 S-B points. ZZZZZ would gain 1 1/2 times 42 plus 2 1/2 times 4 for a total of 63 + 10 = 73 S-B points. This gain of 32 points relative to Djinn would put ZZZZZ sligtly in the lead by 6 1/2 S-B points, pending other results.
Finally let's look at the situation if each wins 1 point against the final opponent. Djinn would gain 1 times 24 plus 2 1/2 times 3 for a total of 24 + 7 1/2 = 31 1/2 S-B points. ZZZZZ would gain 1 times 42 1/2 + 3 times 4 for a total of 42 1/2 + 12 = 54 1/2. This would only be a gain of 23 S-B points so Djinn would temporarily be in the lead by 2 1/2 S-B points pending the outcome of other results.
Prediction: I think Djinn should win because it is playing a weaker opponent and should get at least 3 points, while Greko should get more than 1 point against ZZZZZ.
Norm Pollock
 

Re: Thanks Norm! Gijsbert and Tom will be very nervous now :

Postby Leo Dijksman » 01 May 2004, 08:26

Geschrieben von:/Posted by: Leo Dijksman at 01 May 2004 09:26:39:
Als Antwort auf:/In reply to: S-B possibilities in Div 4 (long) geschrieben von:/posted by: Norm Pollock at 01 May 2004 03:30:25:




WBEC Ridderkerk homepage.
Leo Dijksman
 

Re: Thanks Norm! Gijsbert and Tom will be very nervous now :

Postby Norm Pollock » 01 May 2004, 14:58

Geschrieben von:/Posted by: Norm Pollock at 01 May 2004 15:58:22:
Als Antwort auf:/In reply to: Re: Thanks Norm! Gijsbert and Tom will be very nervous now :-) (n/t) geschrieben von:/posted by: Leo Dijksman at 01 May 2004 09:26:39:

In my calculations there is an error because I did not include the fact that ZZZZZ scored 2.5:1.5 over Djinn in their head to head competition.
So if Djinn and ZZZZZ each gain 3 points out of 4 in their remaining matches, Djinn would gain 1.5*3 = 4.5 S-B points due to ZZZZZ, while ZZZZZ would gain 2.5*3 S-B points due to Djinn.
I was also double counting Djinn's S-B points gained from Greko, and ZZZZZ's S-B points gained from Gully.
I'll try to recalculate and have better results in about an hour.
Norm Pollock
 

Revised Calculations

Postby Norm Pollock » 01 May 2004, 15:35

Geschrieben von:/Posted by: Norm Pollock at 01 May 2004 16:35:57:
Als Antwort auf:/In reply to: Re: Thanks Norm! Gijsbert and Tom will be very nervous now :-) (n/t) geschrieben von:/posted by: Norm Pollock at 01 May 2004 15:58:22:

In my first attempt at calculating the possible S-B's I made 2 mistakes that I am now aware of. First, I did not take into account that ZZZZZ v Djinn resulted in 2.5:1.5 in favor of ZZZZZ. Second, I was double counting the S-B earned by Djinn v Greko and the S-B earned by ZZZZZ v Gully. Now I only counted the incremental increase. I will also only count the incremental increase earned by ZZZZZ v Djinn.
Here are the results. Calculations will follow. These results DO NOT include "side effects" caused by the future results of the other 14 engines, as explained in my original attempt.
Assuming Djinn and ZZZZZ each get 3 points out of 4, their S-B point totals will be Djinn=1458, ZZZZZ= 1492.5. A substantial lead of 34.5 S-B points for ZZZZZ while waiting to see how the other 14 engines do.
Assuming Djinn and ZZZZZ each get 2 points out of 4, their S-B point totals will be Djinn=1439, ZZZZZ= 1455.5. A comfortable lead of 16.5 S-B points for ZZZZZ while waiting to see how the other 14 engines do .
Assuming Djinn and ZZZZZ each get 1.5 points out of 4, their S-B point totals will be Djinn=1429, ZZZZZ= 1436.25. A lead of 7.5 S-B points for ZZZZZ while waiting to see how the other 14 engines do.
Assuming Djinn and ZZZZZ each get 1 point out of 4, their S-B point totals will be Djinn=1418, ZZZZZ= 1406.5. A lead of 11.5 S-B points for Djinn while waiting to see how the other 14 engines do.
Here are the calculations:
-----------------------
Assumption #1 (each gets 3 points)
Djinn's S-B = 1385 + 3*22(Gully) + 1.5*3(ZZZZZ) + 2.5*1(Greko) = 1458
ZZZZZ's S-B = 1359.5 + 3*40.5(Greko) + 2.5*3(Djinn) + 4*1(Gully) = 1492.5
-----------------------
Assumption #2 (each gets 2 points)
Djinn's S-B = 1385 + 2*23(Gully) + 1.5*2(ZZZZZ) + 2.5*2(Greko) = 1439
ZZZZZ's S-B = 1359.5 + 2*41.5(Greko) + 2.5*2(Djinn) + 4*2(Gully) = 1455.5
-----------------------
Assumption #3 (each gets 1.5 points)
Djinn's S-B = 1385 + 1.5*23.5(Gully) + 1.5*1.5(ZZZZZ) + 2.5*2.5(Greko) = 1429
ZZZZZ's S-B = 1359.5 + 1.5*42(Greko) + 2.5*1.5(Djinn) + 4*2.5(Gully) = 1436.25
-----------------------
Assumption #4 (each gets 1 point)
Djinn's S-B = 1385 + 1*24(Gully) + 1.5*1(ZZZZZ) + 2.5*3(Greko) = 1418
ZZZZZ's S-B = 1359.5 + 1*42.5(Greko) + 2.5*1(Djinn) + 4*3(Gully) = 1406.5
-----------------------
Norm Pollock
 

Update

Postby Norm Pollock » 01 May 2004, 16:06

Geschrieben von:/Posted by: Norm Pollock at 01 May 2004 17:06:03:
Als Antwort auf:/In reply to: Revised Calculations geschrieben von:/posted by: Norm Pollock at 01 May 2004 16:35:57:
In my first attempt at calculating the possible S-B's I made 2 mistakes that I am now aware of. First, I did not take into account that ZZZZZ v Djinn resulted in 2.5:1.5 in favor of ZZZZZ. Second, I was double counting the S-B earned by Djinn v Greko and the S-B earned by ZZZZZ v Gully. Now I only counted the incremental increase. I will also only count the incremental increase earned by ZZZZZ v Djinn.
Here are the results. Calculations will follow. These results DO NOT include "side effects" caused by the future results of the other 14 engines, as explained in my original attempt.
Assuming Djinn and ZZZZZ each get 3 points out of 4, their S-B point totals will be Djinn=1458, ZZZZZ= 1492.5. A substantial lead of 34.5 S-B points for ZZZZZ while waiting to see how the other 14 engines do.
Assuming Djinn and ZZZZZ each get 2 points out of 4, their S-B point totals will be Djinn=1439, ZZZZZ= 1455.5. A comfortable lead of 16.5 S-B points for ZZZZZ while waiting to see how the other 14 engines do .
Assuming Djinn and ZZZZZ each get 1.5 points out of 4, their S-B point totals will be Djinn=1429, ZZZZZ= 1436.25. A lead of 7.5 S-B points for ZZZZZ while waiting to see how the other 14 engines do.
Assuming Djinn and ZZZZZ each get 1 point out of 4, their S-B point totals will be Djinn=1418, ZZZZZ= 1406.5. A lead of 11.5 S-B points for Djinn while waiting to see how the other 14 engines do.
Here are the calculations:
-----------------------
Assumption #1 (each gets 3 points)
Djinn's S-B = 1385 + 3*22(Gully) + 1.5*3(ZZZZZ) + 2.5*1(Greko) = 1458
ZZZZZ's S-B = 1359.5 + 3*40.5(Greko) + 2.5*3(Djinn) + 4*1(Gully) = 1492.5
-----------------------
Assumption #2 (each gets 2 points)
Djinn's S-B = 1385 + 2*23(Gully) + 1.5*2(ZZZZZ) + 2.5*2(Greko) = 1439
ZZZZZ's S-B = 1359.5 + 2*41.5(Greko) + 2.5*2(Djinn) + 4*2(Gully) = 1455.5
-----------------------
Assumption #3 (each gets 1.5 points)
Djinn's S-B = 1385 + 1.5*23.5(Gully) + 1.5*1.5(ZZZZZ) + 2.5*2.5(Greko) = 1429
ZZZZZ's S-B = 1359.5 + 1.5*42(Greko) + 2.5*1.5(Djinn) + 4*2.5(Gully) = 1436.25
-----------------------
Assumption #4 (each gets 1 point)
Djinn's S-B = 1385 + 1*24(Gully) + 1.5*1(ZZZZZ) + 2.5*3(Greko) = 1418
ZZZZZ's S-B = 1359.5 + 1*42.5(Greko) + 2.5*1(Djinn) + 4*3(Gully) = 1406.5
-----------------------
Correction in previous summary: with 1.5 points each ZZZZZ would have a 7.25 S-B lead.
Based on Leo's daily update of 01 May, which did not involve games played by Djinn or ZZZZZ, Djinn's current S-B has increased to 1424.75 (an increase of 39.75) and ZZZZZ's S-B has increased to 1394 (an increase of 34.5).
My revised summary is:
Assuming Djinn and ZZZZZ each get 3 points out of 4, their S-B point totals will be Djinn=1497.75, ZZZZZ= 1527. A comfortable lead of 29.25 S-B points for ZZZZZ while waiting to see how the other 14 engines do.
Assuming Djinn and ZZZZZ each get 2 points out of 4, their S-B point totals will be Djinn=1478.75, ZZZZZ= 1490. A lead of 11.25 S-B points for ZZZZZ while waiting to see how the other 14 engines do .
Assuming Djinn and ZZZZZ each get 1.5 points out of 4, their S-B point totals will be Djinn=1468.75, ZZZZZ= 1470.75. A lead of 2 S-B points for ZZZZZ while waiting to see how the other 14 engines do.
Assuming Djinn and ZZZZZ each get 1 point out of 4, their S-B point totals will be Djinn=1457.75, ZZZZZ= 1441. A lead of 16.75 S-B points for Djinn while waiting to see how the other 14 engines do.
Norm Pollock
 


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