[Nuttyman54]

I'd defend just because going to 4 matches is so much more exciting that 3.

But more seriously, it also depends on if I think Blueabot2 has a decent chance to score in 5 seconds. If they do, spend the 10 seconds getting a ringer and getting to the spider leg. This leaves a few possible outcomes:

1. both robots score their ringers. Tie game, 4th match
2. Redabot scores its ringer, Blueabot doesn't. Red wins.
3. Redabot doesn't score, Blueabot does, Blue wins
4. neither scores, Tie game, 4th match

this leaves blue in a much better position than red, assuming blue has a better shot at scoring in 5 seconds than red does in 15. This is a big assumption, but may be correct depending on the situation.