[thorvald]

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With 4-card support and 10-12 it looks like slam is possible, but probably also a bit optimistic,

Blasting to 4N and signing off it not my style, but GIB only knows about cuebidding with aces.

So I decided to bid 3♠ as a Cue, and what happened?

The computer jumped to 4N for aces with this minimum hand without control in either minor

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[thorvald]

8 boards later in the same match.

Bidding started the same way

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You have one more keycard, and a better distribution, but less HCP.
What is your bid? Is the 5-level safe

This time partners hand was

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A slam that seems ok to bid

[thorvald]

I lost the match by the 10 IMP from the first board (♥ 4-0 and even 4♥ could have been defeated)

Probably just a bad judgement by me

[pescetom]

I think the first one (assuming the auction is rotated) was optimistic even playing Italian style cuebids, although it would have stopped safely in game. The second one would certainly be justified.
I don't think it makes much sense to try Italian style if the robot plays Aces. Not sure what it would mean in that style if partner bids the suit where you hold singleton Ace.