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Unread 27-02-2005, 12:24
Travis Hoffman's Avatar Unsung FIRST Hero
Travis Hoffman Travis Hoffman is offline
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FRC #0048 (Delphi E.L.I.T.E.)
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Re: Serious question about defense No Flaming!



I agree with Dave and Paul about the "sit and block" defense of robots attempting to obtain tetras - it's not really a wise thing to do. However, what about once they've picked their tetras up?

Example 6


Robot "RED01" is in the red alliance loading zone, is already loaded with a tetra, and is waiting for a path to clear to the center goal before moving in to the rest of the field. Robot "BLUE01" approaches the loading zone, and blocks RED01’s attempts to leave the loading zone and score on the center goal. The robots come into contact several times while BLUE01 blocks RED01. No penalty is assessed to either alliance, provided BLUE01 acts within the limitations of <G21> that prohibit pinning for more than 10 seconds. RED01 is not retrieving a tetra, so no violation of <G15> has occurred.



I do not agree that staying on your side of the field and trying to maximize your score is always the best approach to take for this game. When you're strategizing with your partners before your next match against a significantly superior offensive alliance, which of the following decisions is more "dumb".....

A.) Realizing that you have little chance at macthing their ability to cap and cap and cap and cap, and deciding to lay down some heavy D in an attempt to level the playing field, improving your chances of victory, or

B.) Giving up all hope of winning the match by "valiantly" trying to match your opponent tetra for tetra, playing up to the crowd's (and FIRST's ?) supposed preference for offense, giving your opponent even more ranking points, making it even more likely you won't be able to catch them in the standings.

???????????????

Well, if it were up to me, I think I'd prefer a decent chance of a W and low ranking points over a certain L and improving the powerhouse teams' chances of warding us off in the rankings.

There ARE going to be situations in a match that require keeping the other alliance from scoring, and instead of waiting and reacting once the opponent decides which of 9 goal locations they want to take their tetra to, why don't you proactively box them into a known location????? If your team is leading somewhat comfortably and want to limit the opposing alliance's ability to quickly score, or you're desperate because you're not equipped with the offensive firepower to compete against the robots in the opposing alliance, why wouldn't you want to use the opponent's loading zone locations as the place to make your stand? The field border and nearby goals serve as natural allies in keeping your opponent where you want them. Give your opponents a wide berth on the way to their tetras - let them make the first move to whichever loading station they choose. While they get their tetra, get in position to stop them, then block them as they try to leave their zone - according to Example 6 above, everyone's fair game once the tetra has been "introduced". If you have a robot that doesn't have a robust arm that can match the opponent tetra for tetra or help you effectively block them from capping at a goal, then your best option may be to try and fence them into their loading area before they can escape to cap. The more time they spend avoiding you, they less time they can spend capping. Oh, by the way, you're also in prime position to keep them from getting their last ditch 10-point score by blocking their endzone.

As recent championship alliances have shown, utilizing a good balance of offense AND defense is a proven way to succeed. Let's all say it together - defense can be cool, defense can be fun, defense can be exciting in its own ways, and it's most certainly not a dumb thing to do, if implemented effectively at the proper times.




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Travis Hoffman, Enginerd, FRC Team 48 Delphi E.L.I.T.E.
Encouraging Learning in Technology and Engineering - www.delphielite.com
NEOFRA - Northeast Ohio FIRST Robotics Alliance - www.neofra.com
NEOFRA / Delphi E.L.I.T.E. FLL Regional Partner

Last edited by Travis Hoffman : 27-02-2005 at 12:40.
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