[blml] Swiss Teams formats [SEC=UNOFFICIAL]

[richard.hills at immi.gov.au]

Herman De Wael:

>Forget it. The players would shout "why do they get 10 VP?". Not
>needed, I believe, if:

[snip]

>So we could make matches A1-A2 B1-C2 C1-B2 D1-D2 immediately,
>with the constraint that if a B wins over an A, he takes their
>place?

Richard Hills:

Yes, the temporary 10 VP carry-forward is merely an aid to the
director for the special Round Two pairings - it need not be
published for the players to shout about.

Of course, some of the players - those in groups B and C - will
shout about being paired against a Round Two opponent whose VPs
differ by ten from their own team's VPs.

Quick history of chess Accelerated Swisses ->

Due to chess having a very compressed "victory point" scale, 1
point for a win, 1/2 point for a draw, 0 point for a loss, in
some big chess Swisses more than one player gained a perfect
score, five wins out of five or six wins out of six.

So the idea behind a chess Accelerated Swiss was to make sure
that the top players met each other as quickly as possible,
since once two top players were paired against each other it
was logically impossible for them both to score 100% in the
event.

If one makes the simplifying assumption that the Elo chess
rating scheme was 100% accurate and that a higher rated chess
player beats a lower rated chess player 100% of the time, then
a five round simple Swiss for 64 chess players does not
guarantee that a player with a perfect score would be the sole
winner.

But after two rounds of Accelerated Swiss, if the simplifying
assumptions hold, only the top eight seeds have a perfect score
of two wins out of two (instead of the normal expectation of 16
players with two wins in a non-Accelerated Swiss), so the
chances of a person finishing with 5 wins out of five being the
sole winner is somewhat improved.


Best wishes

Richard James Hills, amicus curiae
National Training Branch, DIAC
02 6223 9052

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