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Subject: Re: sample round robin pairings

Author: Robert Hyatt

Date: 07:00:42 08/15/05

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On August 15, 2005 at 01:25:28, Richard Pijl wrote:

>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.


also note that the above pairing table is just one of many that can be derived.
I used an online web site that I have used in the past for such events, to
produce the above table.  But it looks like they are following it to start with
except that Peter has said that the pairings were altered to save the most
interesting games for the last few rounds...



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