1C-1Suit-1NT

Question 1

1C-1D-1NT-2C

Answer 1

Forces 2D, weak with D, some invite, singleton auto-splinter, (subsequent 3NT rebid undefined, unlike after 1M response)

Question 2

1C-1M-1NT-2C

Answer 2

Forces 2D, weak with D (longer D than M), some invite, singleton auto-splinter, COG

Question 3

1C-1D-1NT-2D

Answer 3

Unbalanced GF with 4+H, forces 2H, maybe 4441/1444, otherwise at least 5D4H.

Question 4

1C-1H-1NT-2D

Answer 4

Weak with H OR unbalanced GF with 4+D (transfer back to original suit to show GF with second suit D). Forces 2H. If GF then at least 5H4D.

Question 5

1C-1S-1NT-2D

Answer 5

Weak with 5S4H OR unbalanced GF with 4+H (minimum shape 5S4H). Opener GIVES PREFERENCE over 2D in case responder is passing (only “transfer” auction where opener isn’t forced to complete).

Question 6

1C-1D-1NT-2H

Answer 6

Forces 2S, unbalanced GF with 4+S, may be 4144, otherwise at least 5D4S.

Question 7

1C-1H-1NT-2H

Answer 7

Forces 2S, unbalanced GF with 4+S. Could be 4414, otherwise at least 5H4S.

Question 8

1C-1S-1NT-2H

Answer 8

Weak with S OR unbalanced GF with 4+D (transfer back to original suit to show GF with second suit D). Forces 2S. If GF then at least 5S4D.

Question 9

1C-1D-1NT-2S

Answer 9

Forces 2NT, either invitational with 4D6C (unlikely after 1C-1D) or 4D4M32 GF or 3343/(32)44 quantitative.

Question 10

1C-1H-1NT-2S

Answer 10

Forces 2NT, either 4H6C invite or 44(32) GF or 3433/4H4C32 quantitative.

Question 11

1C-1S-1NT-2S

Answer 11

Forces 2NT, either 4S6C invite or 4333/4(32)4 quantitative.

Question 12

1C-1D-1NT-2NT

Answer 12

Forces 3C, either weak with 4D6C (unlikely after 1C-1D) or unbalanced GF with 4+C (minimum shape 5D4C).

Question 13

1C-1H-1NT-2NT

Answer 13

Forces 3C, either weak with 4H6C or unbalanced GF with 4+C (minimum shape 5H4C).

Question 14

1C-1S-1NT-2NT

Answer 14

Forces 3C, either weak with 4S6C or unbalanced GF with 4+C (minimum shape 5S4C).

Question 15

1C-1Suit-1NT-3Lower

Answer 15

GF 5-5

Question 16

1C-1A-1NT-3A

Answer 16

Slam try in A, not suitable for another route. Sets A if it is a major, so Serious/Non-Serious would then be in play.

Question 17

1C-1Suit-1NT-3Higher/4Lower

Answer 17

Slam try in A, void in suit bid. Sets A if major, can still stop in 3NT/4NT if diamonds.

Question 18

1C-1Suit-1NT-3NT

Answer 18

To play

Question 19

1C-1M-1NT-4M

Answer 19

To play

Question 20

1C-1D-1NT-2C-2D-2M

Answer 20

Invitational, 4+D 4M, NF. (If responder is a passed hand this shows 5D4M invite.)

Question 21

1C-1D-1NT-2C-2D-2NT

Answer 21

Invitational, 4+D, no 4CM.

Question 22

1C-1D-1NT-2C-2D-3C

Answer 22

5D5C invite

Question 23

1C-1D-1NT-2C-2D-3D

Answer 23

6D invite

Question 24

1C-1D-1NT-2C-2D-3M/4C

Answer 24

D slam try, singleton

Question 25

1C-1D-1NT-2C-2D-3NT

Answer 25

Doesn’t really exist. If it is bid, then it is a COG between 3NT and 5D.

Question 26

1C-1H-1NT-2C-2D-2H

Answer 26

5H invite. Might be an average 6H invite (not good enough to to jump to 3H).

Question 27

1C-1H-1NT-2C-2D-2S

Answer 27

4S invite, may have 4 or 5 hearts (if passed hand, then definitely 5H4S). Opener can bid 3H with max and 3 hearts to check on the way.

Question 28

1C-1H-1NT-2C-2D-2NT

Answer 28

4H invite, denies having 4S.

Question 29

1C-1H-1NT-2C-2D-3m

Answer 29

5H5m invite

Question 30

1C-1H-1NT-2C-2D-3H

Answer 30

6H invite (sound invite, as 2H is also available).

Question 31

1C-1H-1NT-2C-2D-3S/4m

Answer 31

H slam try, singleton.

Question 32

1C-1H-1NT-2C-2D-3NT

Answer 32

COG with 5 hearts.

Question 33

1C-1S-1NT-2C-2D-2H

Answer 33

5S4H invite.

Question 34

1C-1S-1NT-2C-2D-2S

Answer 34

5S invite (may also be 6S invite not good enough for 3S)

Question 35

1C-1S-1NT-2C-2D-2NT

Answer 35

4S invite.

Question 36

1C-1S-1NT-2C-2D-3m/3H

Answer 36

5S5m/H invite.

Question 37

1C-1S-1NT-2C-2D-3S

Answer 37

6S invite (sound invite as 2S also available)

Question 38

1C-1S-1NT-2C-2D-3NT

Answer 38

COG with 5 spades

Question 39

1C-1S-1NT-2C-2D-4m/H

Answer 39

S slam try, singleton.