[mediesel]

After showing spade shortness and hearing my 4D cue bid, GIB bids Blackwood with 2 losing clubs!

None Vul
GIB Dealer

1H P 2N P
3S P 4D P
4N P 5H P
6H

GIB had
5 KQT652 AT97 Q9

The Robot opponents cashed the first two clubs; down 1.

[Antrax]

Have you read the explanation for the cue bid? It often shows a higher minimum range than is required for your bids up to now, so GIB simulates it unlikely you won't have a club control.

[georgi]

Thanks for reporting.

Truly GIB knows you don't have ♣A.

But 4♦ shows first control in diamonds ( void as GIB has the Ace), and 19+TP. With 13TP in GIB it's almost 99% slam area with super-fit displayed (10 cards here for sure).

Having as minimum not more than ♥AJ and ♠A, nothing in diamonds ( as you claimed 1st control which looks like void), these minimum 19TP should represent something like KJ in clubs.

Skipping 4♣ call currently means for GIB you don't have Ace, but doesn't refuse having KQJ in that suit.

Very likely cuebidding in approved GF situation would be improved in next version - v28. But meantime GIB would rely on aces and won't deduce it might be singleton.