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Subject: Re: sample round robin pairings

Author: Richard Pijl

Date: 22:25:28 08/14/05

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On August 15, 2005 at 00:22:53, Robert Hyatt wrote:

>Round Robin for 12 players
>==========================
>Round #01 : 02-11 03-10 04-09 05-08 06-07 01-12
>Round #02 : 01-02 11-03 10-04 09-05 08-06 12-07
>Round #03 : 03-01 04-11 05-10 06-09 07-08 02-12
>Round #04 : 01-04 02-03 11-05 10-06 09-07 12-08
>Round #05 : 05-01 04-02 06-11 07-10 08-09 03-12
>Round #06 : 01-06 02-05 03-04 11-07 10-08 12-09
>Round #07 : 07-01 06-02 05-03 08-11 09-10 04-12
>Round #08 : 01-08 02-07 03-06 04-05 11-09 12-10
>Round #09 : 09-01 08-02 07-03 06-04 10-11 05-12
>Round #10 : 01-10 02-09 03-08 04-07 05-06 12-11
>Round #11 : 11-01 10-02 09-03 08-04 07-05 06-12
>
>that's from an online program pairing RR for 12 players.
>
>each round has two double colors from the previous round.
>
>So _if_ they used such a pairing scheme, it could have worked out as it
>happened.  Maybe more information will come from some of the participants when
>they log on here.  But based on the published rules, it was to be paired as a
>Swiss, which makes all this moot and impossible...

Swiss really doesn't make sense for 12 participants and 11 rounds.
From what it looks like, a random ordering into a round robin is done.
Crafty had black twice, so it must have been number 7.
Fute_mt had white twice, so it must have been number 1.
Using this and the scheme above, the following numbers can be assigned to the
programs:

1. FUTE_MT
2. Jonny
3. The Baron
4. Zappa
5. Isichess
6. Shredder
7. Crafty
8. Diep
9. The Crazy Bishop
10. Deep Sjeng
11. Fruit
12. Deep Junior

This makes my expected pairings for round 3:

The Baron - FUTE_MT
Zappa - Fruit
Isichess - Deep Sjeng
Shredder - The Crazy Bishop
Crafty - Diep
Jonny - Deep Junior

Note that I'm _not_ in Iceland and have no further information about the
pairings myself :-)
Richard.



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