Mandell Bids

Chapter 13

2NT System

Card:

New with Radu 11/1/25. After post-2NT Jacoby transfers:

3M: denies 3

3NT: shows 3 (can retransfer)

4x: 4, control in x, missing control somewhere

4M: 4 max with control bids everywhere

Basically bidding 1st control

After Stayman fit: oM is slam try
H&S:
55 Game only: Txfr to S, then 4♥, pass/correct
55 Slam interest: Txfr to H, then 3♠, flag bids (CD for HS good hand, HS bad hand to play)
(5/4) Smolen
S&C slam tries (cheaper for major flags):
45+: Stayman then C (3♣-3♥-4♣) -- 4♦ sets S, 4♥ sets C, 4♠/4N/5♣ to play
54+: Txfr to S then C (3♥-3♠-4♣) slam interest -- 4♦ sets spades, 4♥ sets C, 4♠/4N/5♣ to play
S&D slam tries (cheaper for major flags):
45+: Stayman then D (3♣-3♥-4♦) – 4♥ sets S, 5♣ sets D, 4♠/4N/5♦ to play
H&C/D slam tries (cheaper for major flags):
45+: Stayman then C/D (3♣-3♠-4♣/D): Can’t have M fit. All bids other than 4NT and 5m are positive in support of responder’s minor. Redwood applies (after controls, 4NT is control for redwood suit).
54+: H&C (3♦-3♥-4♣) -- 4♦ sets hearts, 4♠ sets C, 4♥/4N/5♣ to play
54+: H&D (3♦-3♥-4♦) -- 4♠ for H (so then 4NT can be RKC), 5♣ for D, 4♥/4NT/5♦ to play
Diamond slam Try: (3♣-3♦-4♦):4♥ (redwood), 4♠/5♣ (control), 4NT/5♦ (to play)

3♠ then Opener must relay to 3NT
4♣♦: Flip (other minor) slam tries + 1st/RKC: 4♣: 6+D, 4♦ 6+C
1st step rejects, 2nd-5th are RKC responses, over 4♦ reject with 2 w/o Q (no room)
After reject: next step re-asks RKC anyway, other bids are 4N/5m to play or control bids
4♥♠: Both minors slam try, splinter (clarified 8/6/26: 2N-3♠-3N, 4♥♠ is 55 in minors)
2NT-3♠-3NT-4♠: 4NT to play, 5m to play
2NT-3♠-3NT-4♥: 4NT to play, 5m to play, 4♠ tell me which one
4N Quant w/ both minors