NAQT ICT comments/congrats/thanks II

- Ladder play/power matching: The tournament
format leaves a lot to be desired. I think the Friday
night/Saturday morning sections are good. One question though,
is why not have a bracketed round-robin Friday
night? I don't see the point of having the
seeded-not-bracketed system. The power-matching formula seemed to work
pretty well, though I have some questions/suggestions.
Most importantly: what was the effect of the bye on 6
teams (including ours) that played team 42 on Friday?
Were the scores multiplied by 6/5? Was the bye round
counted as a win against a winless opponent (which means
that scores were unchanged)? The modified Swiss-pairs
portion works very well, as in previous years. I would
suggest that the organizers print out a few more columns
of the spreadsheet as they send out the schedule:
without us knowing the win/loss records of our opponents,
we can't check that an error wasn't made in the
seeding. I appreciate that the schedulers waited to check
that all was correct before posting the next round,
but errors can still occur, and apparently did (since
the schedule was changed a few times).

Ladder
play is useless. Let me correct that: ladder play
allows NAQT to put teams 1-42 (or 1-26, for Div II) in
order easily. I've said this often and will say it
again, trying to make my point. I can probably put it
best in computer science terms:

Ladder play is
essentially a bubble sort, where you only have a slightly
better than 50% chance of making the "right" sort each
time, if you call the team that will more often win in
a certain matchup the "right" one. This is probably
the MOST inefficient way of sorting teams top to
bottom. As I said previously, I believe that the modified
Swiss pairs works very well in sorting teams to similar
ability. Thus you end up playing the team just above or
below you, and will end up playing very close games...
games hinging on a single question likely (as all of
our ladder play games did). A single loss or win in
these games doesn't mean much, but the total number of
wins/losses vs. similarly rated teams would work
better.

A four-game round-robin among groups of 5 teams
would be much better at determining their relative
position. If you dislike not allowing teams to move between
brackets, then make brackets of 4 which then seeds for an
offset round robin.

- Other comments: Though I'm
happy with our final placing, and believe it was
probably (approximately) correct, I do have a niggling
doubt or two. Penn State lost 5 matches, by a combined
total of less than 150 points! If we had been blown out
by Illinois or Harvard or whomever we would have
known more concretely that we weren't suited for such
lofty places. On the other hand, the fact that we lost
to teams who weren't so highly ranked means we
weren't that good.

When you win is more (equally?)
important than who you beat: we lost to Carleton in the
final round of Swiss pairing, dropping our record to
7-3. We beat them twice in the ladder play, however.
Had we beaten them the first time, we would have been
seeded ~7th instead of 11th. Illinois beat Chicago twice
before losing to them once, and hence had to beat them
twice in the finals to win the whole thing. This is an
artificial effect of the seeding process, and probably
should be addressed in future setups.

-On the
whole, I enjoyed the tournament, but think that the
fancy-shmancy methods of ranking teams have hidden pitfalls.
With more mundane methods (such as what every other
tournament uses!) you know what you are getting into
beforehand.

Rob

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