Practice on Cuebids
Practice hands where responder has major support and shortness, then decide whether game or slam is realistic.
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Last updated
2026-07-31
What is a splinter bid?
A standard splinter bid shows at least four-card support for partner's suit, game-forcing values, and a singleton or void in the suit bid.
The jump is artificial. Its purpose is to help partner evaluate whether their high cards are working.
A standard immediate splinter is a double jump in a new suit. A useful shortcut over one of a major is that any new-suit response above the jump raise to three of opener's major is a splinter: over 1, 4, 4, and 4; over 1, 3, 4, and 4.
Spade support with club shortness
- 4 is a splinter, not natural.
- Responder shows at least four spades, game values, and club shortness.
How opener evaluates
Opener upgrades hands with values outside the short suit and downgrades hands with wasted honors opposite shortness. Ace-small in the short suit can still be useful; queen-jack-small is often poor.
With fitting cards and extra strength, opener moves past game with a control cuebid or a keycard ask. With wasted values, opener simply returns to four of the major.
Splinter versus other raises
Splinters solve a different problem from Jacoby 2NT. Jacoby 2NT shows a game-forcing raise and asks opener to describe; a splinter immediately announces where responder has shortness.
That immediate shortness information is powerful when opener has a borderline slam hand. Responder must have the agreed strength: limited-splinter pairs route stronger hands differently, while unlimited-splinter pairs allow any game-forcing strength and expect responder to bid again when stronger. The short suit must still be a singleton or void.
- Use a splinter with game-forcing support and the partnership's agreed strength range.
- In a limited style, a common responder range is about 13-15 total points, including distribution.
- In an unlimited style, responder can splinter with more and continues over a minimum signoff when appropriate.
- Avoid splintering with a singleton ace unless the partnership uses that style.
- When opener has wasted honors in the splinter suit, game is usually enough.
Splinter examples
A splinter bid is artificial even though it names a suit. The bid suit is shortness, not a source of tricks.
Heart support with spade shortness
- A double jump to 3 is commonly a splinter in support of hearts.
- Responder shows game-forcing values and spade shortness.
Spade support with diamond shortness
- 4 is artificial and agrees spades.
- Opener downgrades diamond honors and upgrades side controls.
Opener signs off opposite wasted values
- Responder shows club shortness.
- With club honors that look wasted, opener can settle for game.
Evaluating opener's hand
The splinter tells opener where not to count slow values. Honors in responder's short suit are less useful unless they are aces or help establish control immediately.
Upgrade opposite club shortness
- After 1 - 4, opener has working values outside clubs.
- This hand can cooperate toward slam if controls fit.
Downgrade opposite club shortness
- Club honors are poorly placed opposite singleton or void clubs.
- Game may be enough despite the high-card count.
Splinters by opener and later in the auction
Opener can splinter too. A double jump in a new suit over partner's response, such as 4 over a 1 response to 1, shows four-card support, shortness in the bid suit, and a hand strong enough to insist on game opposite a minimum response.
Many pairs also play splinters after minor-suit openings and in later rounds once a fit is set, but these auctions vary widely; agree explicitly which jumps are splinters.
Opener splinters after a one-level response
- 4 is a double jump: opener shows four spades, heart shortness, and game-forcing strength.
- Responder signs off in 4 with a minimum or cuebids with slam interest.
Opener's splinter rebid
- After 1 - 1, this 18-count is worth 4: four spades and a singleton heart.
- A quiet invitation could be passed out; the splinter forces game and lets responder judge slam.
Common mistakes
- Treating the splinter suit as natural.
- Splintering with only invitational values.
- Ignoring wasted values in the short suit.
FAQ
Is a splinter bid forcing to game?
Yes, in standard usage a splinter commits the partnership to game. Mini-splinter variants that can stop lower are a separate agreement.
Can a splinter show a void?
Yes. It normally shows a singleton or void in the bid suit.