ArtK78, on Jan 22 2008, 05:33 PM, said:
The fact that any good player would play this as anything BUT preemptive would surprise me.
I think there's a good case for both definitions (invite or pree). Sometimes RKCB isn't enough to uncover the solidity of a suit: say you have
Ax
x
AKQJT9
Axxx
and pard opens a vuln 3♥. If you RKCB and get 5♦ as an answer, you won't get to know whether pard has KQxxxxx or KQJTxxx for a suit. If in this case you have 3-5 as invite, pard will know to pass with hand 1 and bid 6 with hand 2.

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