[sigen]

I was playing individual tournament, and pd was replaced with robot before the board begun.

The bidding went
1C-1S
2C-2H
3S-5S
?

The robot bid 5S. What does it mean here?

Googling, I found it might ask for diamond control (unbid suit)
but the robot had Kx in diamonds himself.
Any other possible meaning for this bid?

[SteveMoe]

[Disclaimer - I have not played with robots]
1) The real questions here might start with what 2♥ and your 3♠ bids mean.
Some play 2♥ as natural GF in this auction. If so then 3♠ might be assigned a splinter in support of ♥s. 5♠ here might then say "I've got a strong 6-4" and can play 6 with 2 minor suit cover cards. (As and Ks).

2) If however 2♥ was non-forcing, then 3♠ would show a 3-card raise inviting/forcing game. 5♠ should then be asking about controlling the unbid suit. The only alternative would be some kind of trump quality ask, but that's not common.

Of these 2 I think the latter is more likely without more information.

[ArtK78]

Robots are very fond of jumping to 5 of a major. In my experience, it means "I have a good hand for the bidding and we should probably bid a slam if you have what you said you have."

I only pass the jumps to 5 of a major when I have overbid. If I REALLY have my prior bids then there may be a grand slam, so a further cue bid is warranted.

[yin970902]

usually,bid 5s asks D's stoper.
robot bids 5s maybe ask D's helper or an other club trick.

[chasetb]

With the robots on here, they like to jump A LOT. It in theory should be an ask in Diamonds, but ArtK78 nails it in that GIB is just saying it has extras. However, unlike his experiences, with me GIB always seems to jump with too little or with too much, I never hit the sweet spot that he seems to get.

[Phil]

Robots like to use HSST's and jumps to 5M. These are generally rational bids after a 2/1, but in other sequences where we have 1) rebid 2N after 1x, 2) opened 2N, or 3)rebid 2N after 2♣, I find that the calls tend to be about a K/Q light.

Look at the texture of your hand and your trump holding, and you can usually come up with the right answer.