McKinley VEXhibition

Hey guys! As many of you may know, Hawaii’s first tournament, the McKinley VEXhibiton, took place on August 19 and 20. It was an exciting, well-run, and on-time event with a nail-biting finals match that came down to one point! Congratulations to all participants, but especially to:

394: Programming Skills Champions (9)
359: Driver Skills Champions (22), Finalists
2438: Tournament Champions
3008: Tournament Champions
2504: Tournament Champions
4109: Excellence Award, Finalists
3685: Finalists
368: Event Coordinators (Hooray!)

Because of the reduction in the number of available worlds-qualifying spots for Hawaii teams, the tournament champions and skills winners did not qualify for Anaheim (that honor was reserved only for the very deserving Excellence Award Winners). However, tournament champions won an extra slot at the Pan-Pacific competition.

Additional factual notes:
1) We had one double-disqualification in qualifications when a team accidentally tipped and landed on their opponents’ gate. The other alliance, trying to be courteous and not damage the first team’s robot, left the gate down past the 30 second mark. Disqualifying both was the correct call, but I sort of wish that the game didn’t penalize teams for refusing to risk damage to fallen opponents.
2) Double-disqualification included, there were a grand total of five matches that ended in ties. One of the ties was between the robots that were at the time seeded second and third. A win would have made either one first seed, but because they tied, they wound up second and fourth!
3) The highest match score was 28, put together by teams 2438 and 394 in a qualification match. The highest-scoring match overall was Finals Match 1, in which 4109 and 359 prevailed over 2438 and 3008 by a score of 26 to 21. Only one doubler was in play!
4) Generally, scores were higher in Eliminations, but they were somewhat deflated by use of the negation barrel.
5) The lowest winning match score in Eliminations was Finals Match 2, in which 4109 legally descored a doubler to drop the winning score from 20 to 14.
6) In the year where VEX finally allowed us to plug in your batteries during a match if you forget to do it earlier, we had the first tournament I’ve ever been to where no one forgot to plug in their batteries. Go figure.

Strategies and tips that I personally noticed:
1) Be careful about introducing the doubler and negation barrels early! Even if you pull it back, it’s still a disqualification. Finals Match 2 was 14-10 in favor of Blue before Red was disqualified for early negator introduction. It didn’t affect the outcome, but imagine if it had been Blue that had put the negation barrel in at the 40 second mark!
2) Don’t underestimate the power of the floor goal. Several of the ties were generated by loose balls rolling around on the mat and going into the floor goals on accident!
3) In matches where everyone’s on their A game, there are only three contested bonuses on the field. I’ve posted about this before, but the 20" goals in isolation and the central 30" goal are really important. When both Interaction robots deadlocked in front of the 30" goal, Finals Match 3 became a race to see whose robot would finish and leave Isolation first.
4) In Qualifications, Match Loads sometimes lasted for the whole match. By Eliminations, they were usually all in play and scored within the first minute. It helped that, later in Eliminations, alliances sometimes took all four preloads.
5) Autonomous is like a head-start on the match, even without the bonus. The most successful teams all approached target goals in autonomous, though they didn’t necessarily score.

Once again, thanks to everyone for a great tournament! Check out our robot in the reveal thread soon to be posted by my fellow team member. Hawaii teams, see you at the next regional! (Footnote: Threads like this should probably go in the Gateway forum, but no one has posted there in weeks, so I decided to put this in General.)

Congratulations on a job well done to all teams! For an August event, the level of play was high already. What does the future have in store…?

Just a note that with 2438’s win, the Excellence determination made them tied with 4109. For us, breaking the tie came down to 4109 getting higher scores in both of the Skills Challenges over 2438.

Good luck to all in your upcoming competitions!

It seems like this tournament in hawai had ALOT higher scores than it did in the youtube videos of REX hosts gateway. Thanks for posting this info!

Does anybody know if there will be any video footage of this competition released to the public? I would really like to see some of these matches, they sound very interesting.

Are there any videos of these matches? cause i think a lot of people will be happy to see them :D.

+1 at that.

Also, how would you rate the robots? Were they primarily speedy claws or slower, volume type robots?

  • Sunny G.

Gah! That darn doubler in programming skills! If only we had run the intake for half a second more…

Oh well. I felt like 4109 earned it with their impressive skills runs and their great performance in eliminations, and there’s always another regional… Congratulations!

Sunny, to answer your question, most (~12/18) of the robots were intake-style. I recognized many of the designs from VEXforum or Elevation. The types of intake varied rather dramatically, though. This is not to say that there weren’t speedy claws (4109 immediately springs to mind), but a lot of the designs did use rolling intakes.

Congrats to all the teams! The tournament was a lot tougher than I expected it to be when I saw the first few robots on Friday and I felt we could’ve done a bit better but it couldn’t be helped for the first competition XD. Nonetheless, thanks to the post-competition comments and suggestions from some graduated members, I’m even more pumped and ready to upgrade and definitely improve our robot for the next regional :wink:

Ah yes, that was our first match :expressionless: Speaking of that…

Tips

  1. Set a certain time point for automatically opening and latching the gate before 30 seconds, like 40 seconds before the match ends. In that match, even though we lifted the gate at 30 seconds, it wasn’t latched until 29 seconds, which unfortunately caused the other half of the double elimination.

  2. In the interaction zone, as ThirteenTwo mentioned, one strategy for most teams was to be the first in the the middle 30 inch goal and flood the goal with their color. As a result, it also became the site of many robot hand blocking “battles” (for us at least), either due to a team trying to either double the stack of their own or negate all of the enemies and their opponent trying to prevent. If you drop a negation barrel, guard it with your life, because a doubler can cancel it out, causing the goal to shift back to your opponents.

One of our craziest matches with this happened in our eliminations quarterfinals, where we put a negation barrel on, then it was knocked off, then an opponent’s doubler barrel was put on, then our robot took off the doubler from the goal just as time ran out (because it was above the “line” to descore legally). It paid off a second match, as the result was very close, a 1 point difference that allowed us to advance.

tl;dr: A good defense (provided your robot is tall enough) is to block the goal tops to prevent teams from scoring doubler/negation.

  1. Excellence can also be determined from skills challenge. As such, don’t be afraid to do either drivers or programming, even if your autonomous scores one barrel in a goal :stuck_out_tongue: Getting on the board is better than not being on it at all.

Once again, thanks for a great tournament!

I have posted what we have of the three finals matches to YouTube. Others may have better, more full field footage.

Of the five elimination sets (Q2, Q4, S1, S2, F), two of them went to tiebreakers and both of the tiebreakers came out to a one point difference. Tiebreakers = Heartbreakers…

The scores.

As posted in the 2438 thread…

http://www.youtube.com/watch?v=RLqqrTJa6ks
[Vexhibition 2011 Final 3 - YouTube

Thanks to McKinley for putting these up.

New strategy tip I just remembered: If you see a goal that is almost entirely full of your opponents’ objects, and there’s room for a doubler on top, stick one of your generic objects on so that they can’t fit the doubler. Our robot actually got in position to do that in Finals Match 1, but we pulled away because I (the coach) was being stupid, and the doubler scored. Putting in the blue barrel would have resulted in a 22-20 win for Blue (-6 for Red because no doubler, +1 for Blue because extra tube) and a lot less drama in Finals.](Vexhibition 2011 Final 3 - YouTube)

Yes --that situation kinda sucks.

However, you can imagine how bad it would be if someone left the gate down to their own advantage to keep their opponents out. “So not only did one of our robots fall over, but now our opponents get to lock us out of their zone for the whole match?

The GDC’s intent was that at the 30 second mark, the whole field is open, no exceptions.

There was no way for them to raise the gate without damaging the opponent robot?

-John

Yeah… although if your alliance partner has tipped over, you probably have bigger things to worry about than getting into the opponents’ isolation zone, especially since their robot has been locked in there for 90 seconds and has probably scored in pretty much everything. Consider that with the gate forced down, it is difficult for teams to double their own 30" goal.

There might have been, but it was one of those things where you’re not going to know if it’s safe until you try it.

Out of curiosity, how many teams total were in attendance at the tournament?

18, including two from the host school. Top two alliances got a bye in quarterfinals.