Defense for Logomotion

[pianogrrl71]

Hey guys! I've been looking for a CD forum with a discussion about the best defensive strategies from the 2011 regionals, but there doesn't seem to be one -- so here we are.

At the start of this year, I have to say I wasn't convinced that defense would play a huge rule in this game, due to being able to throw the tubes and the robots being able to safely stay in their zone. Plus the huge penalties for violating the lanes/zones or pinning the robots. But after attending two regionals, I have to say that defense and the interesting defensive rules that have often changed the game in some of our matches.

Have you guys seen any particularly cool defensive moves this year? Any rules that might be utilized to be better at defense? Any interesting strategies?

[ahollenbach]

The best defense I've seen was played by 1391 at Philly, where they basically drove side to side between the opponent's two towers. An advantage they had was height, as well, so tubes were harder to through into the alliance's safety zone.

[nikeairmancurry]

Hahahaha Defense.... There was a good lack of it at the Michigan State Championship... It's a huge reason for the like zilllion 100+ match scores...

[MagiChau]

Defense was a killer in Michigan State Championship for minibot race. For instance the 8th alliance in quarter-finals, Team 74, blocked Team 469 from deploying at the start of the end-game. It gave their alliance a better chance of winning and resulted in 469 being unable to deploy and their alliance taking 1st and 2nd place respectively with Team 216 taking third. Seems better to secure the 10 or 5 points from a better result in minibot race with your third robot if you aren't going to complete a logo in top or middle row. Unless you're one of those drivers that just has to pull off a tube hang after deployment

[Colin P]

One of my teams managed to shut down the Shoe-in alliance at the Troy District. Hard hits and pushing the tubes into the lanes brought down the alliance that was written off to win from week one.
2586 is a little team from the U.P. which I am very honored to work with after such a great performance to upset two of the greatest teams in FIRST.

[penguinfrk]

Originally Posted by MagiChau

Defense was a killer in Michigan State Championship for minibot race. For instance the 8th alliance in quarter-finals, Team 74, blocked Team 469 from deploying at the start of the end-game. It gave their alliance a better chance of winning and resulted in 469 being unable to deploy and their alliance taking 1st and 2nd place respectively with Team 216 taking third. Seems better to secure the 10 or 5 points from a better result in minibot race with your third robot if you aren't going to complete a logo in top or middle row. Unless you're one of those drivers that just has to pull off a tube hang after deployment

I don't think this'll be a big issue at Championships, but I guess it's worth saying now.

Know when to sacrifice one of your minibots to stop the opponent's faster minibot(s). Even if there are 2 robots on each alliance that can score a minibot, if you can't do it faster you're time's better spent keeping the opponent from scoring theirs.

I suspect that at St. Louis all elimination round robots will have a reliable minibot (if not their own, then their alliance partners') in case one is being heavily pressed by defense.


I wasn't able to watch any matches with Dragonfly from 3553. How'd they do this season?

[Deetman]

Originally Posted by penguinfrk

I wasn't able to watch any matches with Dragonfly from 3553. How'd they do this season?

Unfortunately I had to work Friday and wasn't able to get to the stands for any of their matches Saturday in Philly, but from what I'm told they were able to play some effective defense. Not only that, but they were picked for elimination rounds and won the Rookie All-Star award.

[viperred396]

I know in the Colorado regional defense wasnt played too much but when it was it was a game changer.

We had a bot very similer to the "dragonfly" from 3553 and it was a great thing. We were more often then not able to cut scoring in half for some powerhouse teams.

Where as before they could score both top logos and some of the middle, if we were playing Defense then they were lucky to score 2 or 3 tubes total

[ahollenbach]

3553's robot was extremely successful in essentially halting the excellent scoring flow of 341's bot, as well as tripping up the omnidrive of 365's bot. Although some of the more powerful robots were able to move them around with ease, they were a force to be reckoned with for teams who did not anticipate a need for power, and earned the well-deserved rookie all-star award.

[Gdeaver]

Many of you may have watched Some of the Philly regional. I have to say it was a weird one compared to the others I watched. There was some very effective defensive strategy unleashed by many teams. We were on both sides of it. We were defend and bashed severely and we also adopted a defensive strategy in some elimination rounds. We had our claw sheared off. Luckily a small piece of metal stopped it from detaching on to the field and getting a penalty. Several times we took sever impacts that messed up our mini bot so we could not deploy. On Friday early on I was at the field level and saw a robot come out of Auto, fly across the field and smash an opposing teams robot head on. The robot was launched back about 18 to 20" and was air borne. Their arm thrashed around at a sever angle. They were not effective the rest of the match. Think of the impact load and G forces that robot endured. The problem is this happens all day and the effects are cumulative. Drive trains get loose and sloppy. The arm or lift gets sloppy or binds and then a robot that was 100% hanging a ubertube now is marginal. The human players are smarter and do not flood the field with tubes. So when one does come out its a sprint to get to it. Even if you get to it first, is you grabber strong enough to pull it out of the grasp of the opposition that just grabbed on too? If you win the fight for the tube, there is another robot between you and the rack. With today's robots you can not plow through them, It's a jog and dance to get by them to put a tube up with a worn robot. Elapsed time - allot. Then It's back through the defender to do it all over again. The result is low tube hanging scores. The end game has also matured and defense is very effective. Putting allot of tubes around a post works and blocking that supper fast mini bot is critical. Being able to align and deploy in your protected zone can really help. Of course defense also carries the risk of penalties. Yellow and red cards can destroy your chances. I saw allot of teams that were very smart at defense and new how to push it and at the same time avoid going too far and get penalties. Yes a team can play offense and defense in the same match. When your coming out after hanging a tube take a second and whack that defender so your alliance partner can get threw with a tube. Defense is fun. That offensive team is totally focused on getting a tube. They never see you lining them up and coming. One good whack and they are thrown off their game. Then go hit another bot. Come back and whack them again. He, He defense is fun. Yes, defense changes the game. Our first regional was offensive and we did not do well. We are not the best offensive team. Our minibot and deployment is OK but not supper fast. We can hang ubertubes but not 100%. We are very agile with swerve drive. Our robot, arm and grabber proved to be very durable and could be fixed fast. Our alliance partners also were on the same page, adaptive and executed very well. In the end our alliance adapted and executed superbly to over come one crisis after another. We won by surviving attrition. Defense changes the game. Yes, Philly was weird. Going forward can your team deal with heavy defensive strategies?

[GGCO]

Despite FIRST's attempts to penalize defense into obscurity, defense is definitely a huge part of Logomotion. The biggest reason is that its a mess to have three robots trying to score at once, and therefore it just makes sense to have the third robot play defense.

[fuzzy1718]

There is a lot more to defense then just stalling people in this game. One of the most effective defensive strategies is tube starvation. You seen it a lot at MSC. I'm not saying stalling an opponent is not affective. In fact when mixed with tube starvation it is quite crippling to an alliance.

My personal opinion, based upon watching quite a few differant elimination rounds, having 1 robot stall the other alliance's movement to and from the rack, 1 robot delivering tubes to its safe zone, and 1 robot hanging is one of the best strategies.

Has anyone else seen this?

[Jeffy]

Originally Posted by fuzzy1718

There is a lot more to defense then just stalling people in this game. One of the most effective defensive strategies is tube starvation. You seen it a lot at MSC. I'm not saying stalling an opponent is not affective. In fact when mixed with tube starvation it is quite crippling to an alliance.

My personal opinion, based upon watching quite a few differant elimination rounds, having 1 robot stall the other alliance's movement to and from the rack, 1 robot delivering tubes to its safe zone, and 1 robot hanging is one of the best strategies.

Has anyone else seen this?

I'm not sure "delivering tubes" is really worth it except for a select few robots I have seen. When you make a delievery, it adds an extra tube aqusition time (and release) into the mix. I think we will mostly see one defender and two hangers in St. Louis on sucessful alliances.
PLUS: Many human players have demonstrated the ability to throw all the tubes full field.

[Austin2046]

Watching some of the video from MSC i noticed in semi-final 1 match 2 (seen here http://www.youtube.com/user/FIRSTinM...45/2sbjDxGItW8) team 1023 played some very good defense on the red alliance.

They pushed a number of tubes into the safety of their lanes (in particular squares) denying them logo possibilities. They hit tubes the robots were trying to pick up. They pushed robots around while they were trying to score, and they delayed robots heading for their towers... they limited the red alliance to just 72 points while the blue alliance scored 134 points. In the previous match the red alliance scored 143 points, so i think cutting their scoring potential in 1/2is worthy of some recognition.

as a side note, i think all in all the tube starvation (in particular, lack of squares) and the tower alignment delays were the most effective defensive manuvers. even if the robots do get lined up with the towers before the 10 second mark, i think the defense gives the drivers less time and makes them more panicked. this might lead to deployment mistakes or slightly delayed deployment. the less time they have to prepare and wait for that 10 second mark, the better.

[boomergeek]

http://www.facebook.com/video/video....121&comment s

Team 241 playing defense in a deciding quarter final match at Boston Regional:
blocking and tube starvation.

4 CIMs, 6 plaction wheels, low CoG, driver with practice,
only one three point penalty through 8 matches.