Partner opens 1♠. You have four ♠ and enough for game. Bidding 4♠ gets you there, but it leaves partner guessing about slam. Jacoby 2NT and splinter bids keep that conversation going. Both show a strong fit; they differ in who has the shortness to describe.
Start by agreeing the fit and the force
Jacoby 2NT is an artificial response to a one-of-a-major opening. It shows at least four-card support and game-forcing strength. In Tracey's workshop, that starting point is 13 or more points, with no upper limit. A much stronger hand can start with the same bid and continue exploring.
The sequence 1♠ - 2NT therefore agrees ♠. It doesn't suggest playing 2NT, and opener cannot pass. Responder has already decided to reach game. The remaining questions concern shape, useful honors and whether the partnership has enough for slam.
The auction examples in this guide are uncontested and assume an unpassed responder. Passed hands and competitive bidding need separate agreements. The Two Over One guide explains more about how a game force changes the pace of an auction.
Jacoby 2NT gives opener a chance to describe shortness
After 1♠ - 2NT - 3♦, the shortness-showing treatment identifies a singleton or void in ♦. Opener isn't introducing a natural ♦ suit. Responder can now reconsider which honors are likely to produce useful tricks.
A holding such as ♦ Q J 3 may be less helpful opposite shortness than it looked before the auction. Those honors won't necessarily solve a separate loser elsewhere. Useful controls and honors in the other suits can become more attractive.
Don't reduce this judgment to “all honors opposite shortness are worthless.” An ace can still be a trick, and the rest of the hand matters. The point is to examine whether your values work together, rather than adding every point as though the two hands were balanced.
The jump to game closes the conversation
One of the recurring mistakes is reading a higher rebid as a stronger hand. In the workshop structure, opener's direct jump to four of the major is the discouraging action. Staying below game leaves room to investigate.
Tracey's no-shortness rebids use a particular keycard-based distinction. A minimum with fewer than two keycards bids four of the major. A balanced hand with at least two keycards and no extra values bids three of the major. A strong balanced hand with extra values, roughly 18 to 19, bids 3NT.
Here, a keycard means one of the four aces or the king of the agreed trump suit. A side-suit king isn't a keycard. This rebid structure is specific to the workshop; other partnerships use different Jacoby continuations. Don't borrow a response table from a second method halfway through your auction.
A splinter lets responder name the shortness first
If responder has the shortness, a splinter can show it immediately. For example, 1♠ - 4♦ shows strong ♠ support, game values and a singleton or void in ♦. You aren't offering ♦ as a place to play.
Over 1♠, the direct splinters are 4♣, 4♦ and 4♥. Over 1♥, they are 3♠, 4♣ and 4♦. The 3♠ response is the one worth saying aloud with partner: it shows shortness in ♠ and support for ♥, not a long ♠ suit.
In this workshop's treatment, responder uses a splinter with roughly 12 to 15 high card points and suitable shortness. Stronger hands start with Jacoby 2NT. The splinter range is an agreement, so write it down rather than assuming partner uses the same ceiling.
Shortness means a singleton or void
A doubleton can be useful in a trump contract, but it isn't a splinter. Promising one card and turning up with two changes opener's picture of the losers. Tracey also teaches not to splinter with a singleton ace. Use the agreed alternative instead of hiding that distinction from partner.
After hearing a splinter, opener should look at the named suit and then the rest of the hand. If the cards fit poorly, returning to game in the agreed major can be the right decision. If they fit well, there may be room to investigate further. The splinter is information, not a command to bid slam.
Don't ask for keycards before you know what they will settle
Knowing the number of aces and the trump king doesn't reveal every side-suit problem or establish twelve tricks. Before bidding 4NT, consider controls, trump quality and the tricks you expect to take. A keycard response is most useful when you already know what each possible answer will let you do.
The existing Blackwood and Roman Key Card guide covers that next stage. Record your Jacoby rebids, splinter range and competitive exceptions on the convention card before trying them with a new partner.
Practice the fit, not just the response table
The Jacoby 2NT and Splinters Workshop replay includes the two-hour lesson and two-hour Play of the Hand: about 4 to 5 hours of video, a 30 to 50 page workbook, a two-page cheatsheet and PBN practice hands, for $25.
Pause before the next bid, make your choice, then hear the reasoning at the table. Use the practice files in BridgeChamp or another PBN-compatible platform. For BBO, convert them to LIN if its import tool requires that format.
