Opponents overcall our transfer

[jerome keslin]

Hi,

After 1nt - (p) - 2d - (2s)

         ?

How might opener rebid if he has 4 hearts ( nv vs v )

Thanks

[doug...@aol.com]

Acting without 4 hearts would be unsound. Therefore...

Pass shows < 4 hearts (or 3-4-3-3 minimum).

3H should show the weakest biddable holding (3-4-3-3 maximum).

2N (= spades), 3C and 3D could show values or your doubleton. I'd prefer the doubleton. Discuss w partner. 

That leaves Double, which might show 4 good spades and xxxx in hearts.

P. S. Why play Jacoby Transfers over WNT? 

Sent from AOL on Android

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[jerome keslin]

Sorry. Was hoping that there might be a few players who played transfers who could give me some advice.

To view this discussion on the web visit https://groups.google.com/d/msgid/kaplan-sheinwold/234458868.3253569.1723305831477%40mail.yahoo.com.

[Alex Martelli]

On Sat, Aug 10, 2024 at 11:05 AM jerome keslin <jet...@gmail.com> wrote:

Sorry. Was hoping that there might be a few players who played transfers who could give me some advice.

Of course there are -- in particular, if you play "timid K&S" (strong NT when vul), as Kay and Kaplan did, you may not want to have two completely different systems of NT responses depending on vul, so you might adopt even on a weak NT a system optimized for responding to a strong NT -- fully aware it's sub-optimal, but less of a memory load (of course bidding after 1 of a minor will also likely be quite different depending on vul, in "timid K&S", but that's pretty much inevitable). Or if you're just transitioning from playing strong NT to weak, keeping NT responses unchanged, temporarily, may ease the transition.

In all such cases there's a deliberate choice for simplicity (lower memory load) over maximum efficacy, so in that spirit I would keep opener's replies on 1N-(P)-2D-(2S) dirt-simple too: penalty double, everything else a "super-accept" just as it would be if opener's RHO had passed on 2D, whatever you choose to play in such a sequence ("super-accept" can sometimes be shaded lighter than it would be if RHO had passed).

Of course there are better systems than transfers over a weak NT -- competitively, starting with a natural signoff such as 1N-(P)-2S gives opps a much harder time than if responders started w/a 2 H transfer (this is similar to transfer preempts: sounds good but IF opps are prepared the transfer start undermines preemptive effectiveness -- against unprepared opps you might gain just because they aren't prepared, but that feels unfair and not satisfactory to me).

For example, when I was playing with the late, much missed David Morgan from Australia, a fellow K&S fan, he developed scheme (we called it "M&M" for "Morgan and Martelli" -- I ran all the simulations to assess and adjust effectiveness, e.g. showing that a pure-quant 3N invite is worth little or nothing [in fact most everybody gives up a natural 2N raise in competition, in favor of some Lebensohl variant, so having no quant invite w/o comp is OK;-)]):

2C        Stayman-like
2D    GI or better, 5+H
2M, 3m  sign-offs
2N    GF, 5+S
3M    like vul weak 2, 6+ good suit, slightly GI opposite good fit + QTs
4m   6+S, SI, no SPL, cheapest control
4M    to play
4N   5S-332, NF, SI

(If anybody's interested in more details, LMK and I'll happily share our system notes -- it's a Google Doc, of course [I worked w/Google for more than 18 years] so trivially easy to share online!).

Y, we could have done w/o the slam explorations (VERY rare on a weak NT), and similar follow-ups after an initial 2D response, but together we decided this wasn't really a memory load (alas, we were SO much younger back then, our memories were better;-). (Inv w/5+S starts w/2C; after 1N-(P)-2D-(2S), we used a super-simple scheme except that opener's 3H showed no extras, 3 cards in H or 3=4=3=3, safe because 2D is at least INV, other replies showed doubletons, 2N=spades, w/4H or 3H and excellent max, penalty X).

When David flew from Oz to SF for the Winter 2007 Nationals was when I first joined the ACBL, and when I won my first Platinum MPs ever... man I miss David, such a wonderful human being!, and not just in bridge!-( We played M&M NT of course, and overall it worked well (once I did misremember a follow-up after 1N-(P)-2N, and we played a 60+% slam in 4S because of my error... BUT 6S went down at the other table, so Lady Fortuna had decreed to condone my mistake and then some... David never forgot any agreement no matter how rarely it came up!!!).

Alex

[Adam Wildavsky]

I corresponded with David but never met him in person. I miss him too.

On Sun, Aug 11, 2024 at 1:15 AM, Alex Martelli <ale...@gmail.com> wrote:

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[Adam Wildavsky]

Doug and I use transfers over our 12-14 1N opener, per his preference. It might not be best, but the gains and losses are difficult to quantify.

At present, we have no special agreements when they overcall after the transfer, only when they double. I've started a conversation to remedy this gap!

On Sat, Aug 10, 2024 at 6:03 PM, <doug...@aol.com> wrote:

Acting without 4 hearts would be unsound. Therefore...

Pass shows < 4 hearts (or 3-4-3-3 minimum).

3H should show the weakest biddable holding (3-4-3-3 maximum).

2N (= spades), 3C and 3D could show values or your doubleton. I'd prefer the doubleton. Discuss w partner. 

That leaves Double, which might show 4 good spades and xxxx in hearts.

P. S. Why play Jacoby Transfers over WNT? 

Sent from AOL on Android

On Sat, Aug 10, 2024 at 11:07 AM, jerome keslin

<jetkro@gmail.com> wrote:

Hi,

After 1nt - (p) - 2d - (2s)

         ?

How might opener rebid if he has 4 hearts ( nv vs v )

Thanks

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