[bdaroz]

Quick thought with regard to the 'must affect ranking points'....

If there is a) a time limit to make the call b) you need all 3 teams on the alliance to agree and c) need the ranking points to change then:

1) Is there enough time as robots are being pulled from the field to coordinate with the other two teams?
2) AND in the event that a 100-90 loss was a missed breech and would have resulted in a match point tie, is there still enough time to find and calculate the tie-breaker while coordinating with two other teams?

End of match is hectic as it is... If a team/alliance is feeling slighted by a call (or non-call), it's even more so. While I agree there should be reasonable limits the challenging team should have sufficient opportunity to avail itself of the rule.

To that end I would change the rule to be that the challenge, if successful, must either change the ranking points awarded, or change the win/loss/tie result of the match, without regard to the tie-breaking formula.