[thomas c]

yesterday i started a challenge.

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i

i thought at first the bot if q bidding but the hover over said. " new suit 5+ constructive 10+ pts
i think he must have some spades anyhow. u see the result.

a couple of days before i had this

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now i know the 1s by bot may be on 3 but the alert said " 4 s, 6-8 pts". so i bid only 2s. why would he bid 4???


otoh i have bid to a couple a nice grand slams even bidding into the 6 level to find out more. very nice bidding

[smerriman]

thomas c, on 2018-March-24, 13:02, said:

i thought at first the bot if q bidding but the hover over said. " new suit 5+ constructive 10+ pts
i think he must have some spades anyhow. u see the result.

To be precise, GIB plays unusual vs unusual and is showing hearts - definitely not promising any spades:

Constructive, 4th suit - 5+ ♥, 10+ total points

That's the right bid.

Was the second hand with advanced robots? I can't replicate either the 1♠ or the 4♠ bids with basic robots. Also, the description of the 1♠ bid definitely doesn't show 6-8 points. Do you have a link to the full hand?

[Stephen Tu]

On the first one, the robot is playing a variation of "unusual over unusual". With this convention, one cue bid shows major support inv+, and the other cue bid shows a good hand with the OTHER major. A natural bid in the other major (1s-(2nt)-3h) is usually played as NF long suit, less than invitational opposite a min range opener.

GIB's designation of clubs = spade inv+ raise, diamonds = hearts is very unusual though IMO. GIB appears to use lower cue = raise, higher cue = other major.

The most common treatment is probably lower-lower, higher-higher, where clubs = hearts (new suit if spades were opened, heart raise if hearts were opened), diamonds = spades (spade raise if spades were opened, new suit spades if hearts was opened).

Also common is higher cue = raise, lower cue = 4th suit. The rationale for this is to leave more room for groping for a trump suit when a fit hasn't been established yet.

A 3rd way to play is higher cue = raise, natural bid in other major as natural FG, lower cue = competitive in unbid suit. This caters to getting out in opener's suit when opener doesn't have fit for unbid suit, and allows you to compete a bit more freely with worse suits in the unbid major when holding tolerance for opener's suit.

GIB is using a 4th variation, using lower cue = raise is the worst way to play IMO. I'd prefer any of the others.



On your 2nd board bot is simply insane.

[A2003]

overbidding

[thomas c]

have to admit i did not consider bot showing a new suit. then when i saw the hearts i thought the bot was mistakenly transferring. thanx forthe answers and NO i do not know how to post the links to the hands. sorry
thanx for the answers
one final question
why not use a KISS 2/1 . i admit ive learned a lot about a system i dont like (2/1) and that was one reason i play the bots a lot. but a lot of the bids i will never use.
im just too old to remember them. i dont think they are usually necessary anyhow.

thanx tom