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Mini Splinter - A jump shift or jump reverse (by opener or responder) to show a 4 card fit, a singleton or void in the named suit, and 16+ distributional points, and invitational values:

1C - 1S;
3D

3D promises 4 Spades, a singleton or void in Diamonds, and invitational values.

1C - 1S;
3D - 3S

Responder bids trump at the lowest level to signoff with minimum values

1C - 1S;
3D - 4S

Responder bids game with complementary values

1C - 1S;
3D - ?

Responder may cuebid a new suit with additional values or initiate a slam convention with a strong hand and no wasted values in opener's short suit

Note: partnership agreements for Mini Splinters - some play opener's jump forces game.

By definition, opener's Mini Splinter suit must be beneath responder's suit, allowing responder to signoff in 3H/S with a minimum hand (6-8 bad points).

Additional bids are included to contrast similar bids sometimes confused by novice and intermediate players:

Bid

Meaning

1C - 1S;
3D

4+ Spades, 16+ distributional points, singleton or void in Diamonds, inviting game; note Mini-Splinter suit is always below responder's suit (2D would be a Reverse)

1D - 1S;
3H

4+ Spades, 16+ distributional points, singleton or void in Hearts, inviting game; note Mini-Splinter suit is always below responder's suit (2H would be a Reverse)

1C - 1H;
3D

4+ Hearts, 16+ distributional points, singleton or void in Diamonds, inviting game; note Mini-Splinter suit is always below responder's suit (2D would be a Reverse)

1D - 1S;
3H

4+ Spades, 16+ distributional points, singleton or void in Hearts, inviting game; note Mini-Splinter suit is always below responder's suit (2H would be a Reverse)

Definition of Opener's Strong Jump Shift: Opener's jump bid is in a rank higher than both responder's suit as well as opener's initial suit rank.

Strong Jump Shift by opener with 19+ points:

Bid

Meaning

1C - 1D;
2H

Strong Jump Shift, 19 - 22 HCP (Opener's second suit is above both opener's and responder's suit)

1C - 1H;
2S

Strong Jump Shift, 19 - 22 HCP (Opener's second suit is above both opener's and responder's suit)

1D - 1H;
2S

Strong Jump Shift, 19 - 22 HCP (Opener's second suit is above both opener's and responder's suit)

1D - 1H/S;
3C

Strong Jump Shift, 19 - 22 HCP (typical Opener 3 level jump rebid, below opener's and responder's suit)

1H - 1S;
3C/D

Strong Jump Shift, 19 - 22 HCP (typical Opener 3 level jump rebid, below opener's and responder's suit)

1S - 1N;
3C/D/H

Strong Jump Shift, 19 - 22 HCP (Opener 3 level jump rebid over 1 NT)

Regular rebid by opener:

Bid

Meaning

1C - 1D;
1H/S

Up to 18 HCP - responder could pass (no need to reverse with 17-18 HCP)

1C - 1H;
1S

Up to 18 HCP - responder could pass (no need to reverse with 17-18 HCP)

1D - 1H;
1S

Up to 18 HCP - responder could pass (no need to reverse with 17-18 HCP)

Reverse rebid by opener with 17+ points:

Bid

Meaning

1C - 1H;
2D

17+ HCP, 5+ Clubs and 4+ Diamonds (Clubs longer), reverse suit is above opener's first bid but below responder's bid

1C - 1S;
2D/H

17+ HCP, 5+ Clubs and 4+ Diamonds/Hearts (Clubs longer), reverse suit is above opener's first bid but below responder's bid

1D - 1S;
2H

17+ HCP, 5+ Diamonds and 4+ Hearts (Diamonds longer), reverse suit is above opener's first bid but below responder's bid

1H - 1N;
2S

17+ HCP, 5+ Hearts and 4+ Spades (Hearts longer), reverse suit is above opener's first bid but below responder's bid

1H - 2C/D;
2S

If playing Standard American, 16+ HCP, 5+ Hearts and 4+ Spades (Hearts longer), reverse suit is above opener's first bid but below responder's bid.

If playing 2/1 system, strength is dependent on partnership agreement

Full Splinter jump rebids by opener show 4+ trump support in responder's suit, shortage (singleton or void) in the bid suit, and 18+ distributional points:

Bid

Meaning

1C - 1D;
3H/S

4+ Diamonds, 18+ distributional points, singleton or void in Hearts/Spades; note the splinter suit is always above responder's suit (2H/S would be a Strong Jump Shift)

1C/D - 1H;
3S

4+ Hearts, 18+ distributional points, singleton or void in Spades; note the splinter suit is always above responder's suit (2S would be a Strong Jump Shift)

1D - 1H/S;
4C

4+ Hearts/Spades, 18+ distributional points, singleton or void in Clubs; note opener's 4 level jump rebids are game-forcing splinters (2C is non-forcing, 3C is a Strong Jump Shift)

1C/D - 1S;
4H

4+ Spades, 18+ distributional points, singleton or void in Hearts; note the splinter suit is always above responder's suit (2H would be a Reverse, 3H is played as a Mini-Splinter by some - see below; others may choose to play 3H as a Full Splinter)

1S - 1N;
4C/D/H

5+ Spades, 18+ distributional points, singleton or void in lower suit; opener makes a rare "auto splinter"

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