[helene_t]

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I wasn't sure if I should just drive to slam as GIB tends to be too conservative in (among many other situations) J2NT auctions.

But in this case I am not even sure if I can fault GIB as they have a lousy trump suit and my spade splinter is very bad news.

[fuzzyquack]

That's a bot question rather than a bridge question. I'd choose to respond whatever shows extras. Bots have a pretty quick B-wood trigger after extras although I doubt the grand may be rationally reached with bots. Showing a stiff ace as a singleton/void after Jacoby creates problems in real bridge too.

[helene_t]

I don't know, I often struggle with hand diagrams. Also because they don't render well in the Chrome browser.

Now I tried to edit the post using my phone with as result that the poll disappeared. Sorry.

[shyams]

 fuzzyquack, on 2023-December-26, 05:00, said:

That's a bot question rather than a bridge question. I'd choose to respond whatever shows extras. Bots have a pretty quick B-wood trigger after extras although I doubt the grand may be rationally reached with bots. Showing a stiff ace as a singleton/void after Jacoby creates problems in real bridge too.

Agree with this.

The probability of reaching slam is higher with a 3♥ response to J2NT. The 3♥ denies splinter but shows extra HCP. Hopefully, North bot will cue-bid the club Ace and it will eventually lead to a slam.

[Cyberyeti]

We can bid the grand, but not using GIB's System, we bid length rather than shortage over 2N, but don't bid 2N with a 5 card spade suit (we would bid 2♠ if the hearts were Qxxx, but 1♠ with Jxxx).

[pescetom]

 Cyberyeti, on 2023-December-26, 07:48, said:

We can bid the grand, but not using GIB's System, we bid length rather than shortage over 2N, but don't bid 2N with a 5 card spade suit (we would bid 2♠ if the hearts were Qxxx, but 1♠ with Jxxx).

We could, but I think we would choose to stop in 6♥ as North is troubled by the spades situation and possible splits of opponents, especially if it started 1♥ 1♠ rather than 1♥ 2♣.

[mw64ahw]

The slam should be easily biddable, but it is South that needs to consider the slam/ grand given the known 10-card fit and missing Q♥ - not a pass in my book with 5 modified losers opposite ~7

[Cyberyeti]

 pescetom, on 2023-December-26, 11:24, said:

We could, but I think we would choose to stop in 6♥ as North is troubled by the spades situation and possible splits of opponents, especially if it started 1♥ 1♠ rather than 1♥ 2♣.

The problem with the hand is do you also bid it if the N hand has ♦A, ♣Axx where it's less good and do you also bid it with the 4423 version. We would actually bid it trivially opposite KJ10xx, Qxxx, Ax, Ax but is more difficult opposite the actual hand.

1♥-1♠
2♣-2♦ (not GF)
3♥ (6-4 GF)-4♠ (kickback)
4N (0/3)-5♥ (signoff opposite 0 of course expecting partner to bid on)
6♣ (3 and the K♣)-7♥

N knows about A(x), AKxxxx, x(x), Kxxx and can count 13 on a 2-1 trump break

This is a plausible auction the way we play, but if N doesn't rush into kickback it can get murkier

[fuzzyquack]

 fuzzyquack, on 2023-December-26, 05:00, said:

That's a bot question rather than a bridge question. I'd choose to respond whatever shows extras. Bots have a pretty quick B-wood trigger after extras although I doubt the grand may be rationally reached with bots. Showing a stiff ace as a singleton/void after Jacoby creates problems in real bridge too.

To extend my earlier comment, it's the human responsibility to cover up for bot glaring shortcomings. 3♠ is in my opinion a wrong bid even playing with a good player. Here you play with a moron and your hand is virtually safe at the five level. Just B-wood and take a reasonable risk of raising to six if you here two aces.

[pescetom]

Thinking it through, even the 1♥ 1♠ auction should reach grand in our system, as North still knows about the stiff spades Ace and South promises six trumps and/or the Q.


1♥ - 1♠
2♣ - 2♦ (4SF)
2♥ - 3♥
3♠(CTL) - 3N(me too)
4♣(CTL) - 4♦(CTL)
4♠(CTL) - 4N(even)
5♠(CTL) - 5N(!♥Q)
6♦(CTL) - 7♥
P

[helene_t]

 pescetom, on 2023-December-26, 05:50, said:

Not sure why, but the hand diagram is almost unreadably small.


Edit - spotted the problem, see later. The final ']' was misplaced.

Thanks, corrected

[AL78]

I don't like showing the shortage holding a stiff ace, it could mislead partner as to the value of their spade holding. I'd class the South had as at least intermediate if not strong and bid 3♥ or 3NT opposite the Jacoby response.

[Gilithin]

 AL78, on 2023-December-27, 02:08, said:

I don't like showing the shortage holding a stiff ace, it could mislead partner as to the value of their spade holding. I'd class the South had as at least intermediate if not strong and bid 3♥ or 3NT opposite the Jacoby response.

With a 6th heart, prime values and an unexpected singleton, strong for sure. What South cares about most is a diamond control, so let's start with 3♥ and force partner to show us that.

[jmcilkley]

I would agree that showing a spade shortage probably puts the robot off with KJ spades looking wasted. I wouldn't bid 3s with the singleton ace but I would think of showing an extra point - 3nt if that shows 15-16.