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Seeking Input for Advancing Overcalls

Lately, I've been coaching/mentoring a number of rather recent or advancing B players. A recurring problem seems to be appropriate understandings after our side makes a 1-level or 2-level overcall.

(Confusion sets in simply with the ACBL convention card and explanations elsewhere like "how to fill out your convention card" which are incomplete and misleading.)

To be sure, advanced/expert practices on this question differ, but we do have BWS 2017 which is quite specific.

"C. After Our Suit Overcall of a One-Bid

After our simple overcall of a one-bid:

(a) A new-suit bid by an unpassed advancer is natural and nonforcing, constructive if an advance of a two-level overcall. (Then: a cue-bid by intervenor is artificial and neither shows nor denies a primary fit for advancer's suit.)

(b) A cue-bid may be either a strong raise or a prelude to a forcing bid in a new suit (but a passed-hand cue-bid guarantees a fit for intervenor's suit), a jump cue-bid is a mixed (i.e., semipreemptive) raise that shows at least one defensive trick, a new-suit bid followed by a same-suit rebid is weakish, and a new-suit jump is invitational.

(c) Over a bid by responder, a jump, below-game, new-suit advance is a fit-jump.

(d) A single raise is similar to single raise of major-suit one-bid; direct jump-raises are preemptive.(e) A one-notrump advance shows 8-11 points and a stopper in opener's suit, regardless of vulnerability and suit opened; two notrump is similar, 12-13 HCP (less after a two-level overcall). After a one-notrump advance, a cue-bid by intervenor is artificial and forcing. After a two-notrump advance of a two-level overcall, intervenor's nonreverse, three-level new-suit bid is forcing.

If intervenor overcalls and then shows a lower-ranking suit, indicating length in two suits that could have been shown directly with a two-suited action, intervenor shows only four cards in the lower-ranking suit.

Among advancer's actions when responder bids a new suit:

(a) a double shows length in the unbid suit plus a tolerance for overcaller's suit;

(b) a cue-bid in opener's suit is similar to one had responder passed;

(c) a cue-bid in responder's suit is a strong raise of overcaller's suit;

(d) a simple bid in the unbid suit is nonforcing.

Among advancer's actions after a response of one notrump:

(a) a double shows interest in the unbid suits;

(b) a cue-bid shows a strong raise.

Among advancer's actions when responder raises opener: a double is not for penalty (for takeout or showing general values, depending on level).

After (suit opening) — simple overcall — (single raise) — single raise — (same-suit rebid) — ?, a double is a game-try when (and only when) there is no new-suit bid available below three of the overcalled suit.

Among advancer's actions after responder's negative double: a redouble shows strength."


My intent is to translate the above (with example sequences) for the possible benefit of motivated players.  It would be productive, I think, for such players to agree with as much of these understandings that they can handle.

But first, for possible inclusion, I'd like to hear from members if your methods differ significantly from the expert BWS consensus.  (Transfer advances excluded)

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