I have seen GIB to raise slams bidden after jump pretty often, which in general is wrong. A few minutes ago GIB raised to grand even after I asked for keycards.
GIB holds:
Qxxx
Kxx
K109xxx
---
The bidding goes:
2H by opp1, pass by him, 3H by opp2, 3S by me
pass, 4S, pass, 4NT,
pass, 5nt*, pass, 6S,
pass, 7S, all pass
5nt*=any void, even number of KC
It's pretty understandable to bid grand if he had two keycards, but having zero it makes it a 100% pass on 6S.
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Raising to grand slam after RKCB
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