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Strong Jump Shift by Opener - A skip bid response in a new suit, as:

1H - 1S;
3C

Opener's Jump Shift (Strong Jump Shift) typically show 19-22 points, thus game forcing when responder freebid shows 6+ points.

Definition of Opener's Strong Jump Shift: Opener's jump bid is in a rank higher than both responder's suit and the opener's initial suit rank.  Additional bids are included to contrast similar bids sometimes confused by novice and intermediate players:

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"

Mini Splinter 3 level jump rebids by opener show 4+ trump support in responder's suit, shortage (singleton or void) in the bid suit, and 16+ distributional points.  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):

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)

Also see books on Slam and other slam conventions: 1430, Baby Blackwood, Blackwood, Controls, Exclusion Blackwood/Voidwood, Gerber, Grand Slam Force, Jacoby 2 Notrump, Key Card Blackwood, Kickback, Last Train,  NAMYATS, Pick a Slam, Quantitative Notrump Bid, Rolling Blackwood, Serious 3 Notrump, Slam Try - Stayman, Splinters, Opener Jump Shift, Strong Jump Shift, and legacy treatments as Roman Asking Bids, Roman BlackwoodRoman Gerber.  Slam treatments also include interference of an overcall by opponents, as Negative Slam Double, DOPI, DEPO, ROPI.

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