Litten Polish Club

Welcome to Litten Polish Club! Polish Club is a 5-card major small club bidding system, where the 1 ♣ opening is forcing but not necessarily strong. This bidding system is largely based on Polish Club 2020: Expert. Changes are made with Good, Better, Best and my improvisation.

Notable differences from Polish Club 2020: Expert

Constructive auctions

Preempts

Slam try

References

Hand evaluation

NLTC is a good single hand evaluator but not very additive. It suits preemptive initial actions but not for showing supports. I have a blog article on that topic.

Stopper

References

Opening bids

∅

1 ♣ !F, 18+ HCP or 2+ ♣ 12+ HCP

1 ♦	5+ ♦ or 4 ♦ (441), 12–19 HCP

1 ♥ 5+ ♥ , 11–17 HCP
1 ♠ 5+ ♠ , 11–17 HCP

1NT	2–4 ♠ , 2–4 ♥ , 2–6 ♦ , 2–6 ♣ , 15–17 HCP

2 ♣	!PRE, 4+ ♠ , 4+ ♥ , 4–10 HCP

2 ♦ !PRE, 6+M, 4–10 HCP
2M PRE, 5=#, 4+m, 4–10 HCP

2NT	!UNT, 5+ ♦ , 5+ ♣ , 4–10 HCP

3X PRE, 7+#, 4–10 HCP
3NT !Gambling, SOL 7+m, 0–1 outside A/K
4 ♣ !PRE, S-SOL 8+M, 0–1 outside A/K
4 ♦ !PRE, SOL 8+M, no outside A/K
4M PRE, 8+#

4NT	!UNT, 6+ ♦ , 6+ ♣ , 11–15 HCP

The notrump ladder

Polish 1 ♣ opening

1 ♣

1 ♦ !(R), 0–11 HCP
1 ♥ F, 4+ ♥ , 7+ HCP
1 ♠ F, 4+ ♠ , 7+ HCP

1NT	NF, 2–3 ♠ , 2–3 ♥ , 2–5 ♦ , 2–5 ♣ , 7–10 HCP

2 ♣ !FG, 5+ ♣
2 ♦ !FG, 5+ ♦

2 ♥	!P/C, 4+ ♥ , 5+ ♠ , 7–9 HCP

2 ♠	!INV+, 2–3 ♠ , 2–3 ♥ , 2–5 ♦ , 2–5 ♣ , 10+ HCP

2NT	!FG, 2–3 ♠ , 2–3 ♥ , 3–4 ♦ , 3–4 ♣

3 ♣ !INV, 6+ ♣ , 9–11 HCP
3 ♦ !INV, 6+ ♦ , 9–11 HCP
3M !PRE, 7+#, 3–6 HCP
3NT 33(43), 12–15 HCP
4M PRE, 8+#, 0–4 HCP

The 1 ♦ relay

In our version of Polish Club, the 1 ♦ relay denies game-forcing values. There are two options in this relay.

We swap the 2 ♦ and 2NT responses for better constructiveness, courtesy of Ting-Yu Ye (TpKotoba).

1 ♣ -1 ♦

1 ♥ 3+ ♥ , 12–20 HCP
1 ♠ 3+ ♠ , 12–20 HCP

1NT	1–4 ♠ , 1–4 ♥ , 1–6 ♦ , 1–6 ♣ , 18–20 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 0–3 ♥ , 12–20 HCP

2 ♦	!NF, 0–4 ♠ , 0–4 ♥ , 21–23 HCP

2 ♥ 5+ ♥ , 20+ HCP
2 ♠ 5+ ♠ , 20+ HCP
2NT !FG, 24+ HCP
3 ♣ 6+ ♣ , 20+ HCP
3 ♦ 6+ ♦ , 20+ HCP

3 ♥	!FRAG, 0–1 ♠ , 2–3 ♥ , 4–5 ♦ , 4–5 ♣ , 20+ HCP

3 ♠	!FRAG, 2–3 ♠ , 0–1 ♥ , 4–5 ♦ , 4–5 ♣ , 20+ HCP

3NT !Gambling, SOL 7+ ♣ , likely stops in two side suits

1 ♣ -1 ♦ -1 ♥

1 ♠ 4+ ♠ , 4–6 HCP

1NT	0–3 ♠ , 0–3 ♥ , 0–4 ♣ , 5–7 HCP

2 ♣ 5+ ♣ , 5–9 HCP
2 ♦ !NF, 5+ ♦ , 5–9 HCP
2 ♥ 4+ ♥ , 4–6 HCP
2 ♠ !INV, (xx)45, 9–11 HCP

2NT	!INV, 5= ♦ , 4+ ♣ , 9–11 HCP

1 ♣ -1 ♦ -1 ♠

1NT	0–3 ♠ , 0–4 ♥ , 0–4 ♣ , 5–7 HCP

2 ♣ 5+ ♣ , 5–11 HCP
2 ♦ !NF, 5+ ♦ , 5–9 HCP
2 ♥ !NF, 5+ ♥ , 4–6 HCP
2 ♠ 4+ ♠ , 4–6 HCP

2NT	!INV, 5= ♦ , 4+ ♣ , 9–11 HCP

1 ♣ -1 ♦ -1 ♥ -1 ♠

1NT 2= ♠ , 12–14 HCP

2 ♣	5+ ♣ , 4+ ♥ , 12–17 HCP

2 ♦	5+ ♦ , 4+ ♥ , 18–20 HCP

2 ♥ 5+ ♥ , 18–20 HCP
2 ♠ 4414, 15–17 HCP

3 ♣	5+ ♣ , 4+ ♥ , 18–20 HCP

3 ♦	5+ ♦ , 5+ ♥ , 18–20 HCP

3 ♠	4+ ♠ , 4+ ♥ , 18–20 HCP

1 ♣ -1 ♦ -1 ♥ -1NT

2 ♣	5+ ♣ , 4+ ♥ , 12–17 HCP

2 ♦	5+ ♦ , 4+ ♥ , 18–20 HCP

2 ♥ 5+ ♥ , 18–20 HCP

2 ♠	4+ ♠ , 4+ ♥ , 18–20 HCP

2NT	4+ ♣ , 4+ ♥ , 16–18 HCP

3 ♣	5+ ♣ , 4+ ♥ , 18–20 HCP

3 ♦	5+ ♦ , 5+ ♥ , 18–20 HCP

3 ♥ 7+ ♥ , 18–20 HCP

3 ♠	5+ ♠ , 6+ ♥ , 18–20 HCP

1 ♣ -1 ♦ -1 ♠ -1NT

2 ♣	5+ ♣ , 4+ ♠ , 12–17 HCP

2 ♦	5+ ♦ , 4+ ♠ , 18–20 HCP

2 ♥	4+ ♥ , 5+ ♠ , 18–20 HCP

2 ♠ 5+ ♠ , 18–20 HCP

2NT	4+ ♣ , 4+ ♥ , 16–18 HCP

3 ♣	5+ ♣ , 4+ ♠ , 18–20 HCP

3 ♦	5+ ♦ , 5+ ♠ , 18–20 HCP

3 ♥	5+ ♥ , 5+ ♠ , 18–20 HCP

3 ♠ 7+ ♠ , 18–20 HCP

1 ♣ -1 ♦ -1 ♥ -2 ♣

2 ♦	5+ ♦ , 4+ ♥ , 18–20 HCP

2 ♥ 5+ ♥ , 18–20 HCP

2 ♠	4+ ♠ , 4+ ♥ , 18–20 HCP

2NT	5+ ♣ , 4+ ♥ , 18–20 HCP

3 ♣	4+ ♣ , 4+ ♥ , 15–17 HCP

3 ♦	5+ ♦ , 5+ ♥ , 18–20 HCP

3 ♥	5+ ♥ , 6+ ♣ , 15–17 HCP

3 ♠	5+ ♠ , 6+ ♥ , 18–20 HCP

1 ♣ -1 ♦ -1 ♠ -2 ♣

2 ♦	5+ ♦ , 4+ ♠ , 18–20 HCP

2 ♥	4+ ♥ , 5+ ♠ , 18–20 HCP

2 ♠ 5+ ♠ , 18–20 HCP

2NT	5+ ♣ , 4+ ♠ , 18–20 HCP

3 ♣	4+ ♣ , 4+ ♠ , 15–17 HCP

3 ♦	5+ ♦ , 5+ ♠ , 18–20 HCP

3 ♥	5+ ♥ , 5+ ♠ , 18–20 HCP

3 ♠	5+ ♠ , 6+ ♣ , 15–17 HCP

The bidding structure at 1 ♣ -1 ♦ -1NT is similar to the 1NT opening. We don't need minor transfers here since we have already bid both minors. Therefore, we change 2 ♠ to a minor suit Multi/Stayman.

1 ♣ -1 ♦ -1NT

2 ♣ !STAY, may be Garbage
2 ♦ !TRF, 5+ ♥
2 ♥ !TRF, 5+ ♠

2 ♠	!Minor suit Multi/STAY, 6+m or 4+ ♦ 4+ ♣

2NT	1–3 ♦ , 1–3 ♣

3 ♣ ! 4+ ♦
3 ♦ ! 4+ ♣

2NT NAT INV
3 ♣ INV, 6+ ♣
3 ♦ INV, 6+ ♦

3 ♥	!SPL, 0–1 ♥ , 2–3 ♠ , 4–5 ♦ , 4–5 ♣

3 ♠	!SPL, 0–1 ♠ , 2–3 ♥ , 4–5 ♦ , 4–5 ♣

3NT S/O
4 ♣ !Gerber, ask for aces
- 4 ♦ ! 0 or 4 aces
- 4 ♥ ! 1 ace
- 4 ♠ ! 2 aces
- 4NT ! 3 aces
4 ♦ !Texas TRF, 6+ ♥
4 ♥ !Texas TRF, 6+ ♠

4 ♠	!FG, 5+ ♦ , 5+ ♣

4NT QUANT INV to 6NT

1 ♣ -1 ♦ -2 ♣
- 2 ♦ NF, 5+ ♦ , 5–11 HCP
- 2 ♥ NF, 5+ ♥ , 4–6 HCP
- 2 ♠ NF, 5+ ♠ , 4–6 HCP
- 2NT NAT INV, 10–11 HCP
- 3 ♣ INV, 4+ ♣ , 9–11 HCP

1 ♣ -1 ♦ -2 ♦

2 ♥ !TRF, 5+ ♠

2 ♠	!TRF to 2NT

2NT	2–4 ♠ , 2–4 ♥ , 2–6 ♦ , 2–6 ♣

3 ♣ !STAY, may be Garbage

3 ♦	!TRF, 5+ ♥ , not BAL

4 ♦	!Texas TRF, 6+ ♥

3 ♣	5+ ♣ , not BAL

3 ♦	5+ ♦ , not BAL

3 ♥ !FRAG, 44(41)
3 ♠ !FRAG, 4144
3NT !FRAG, 1444

2NT	!TRF, 6+ ♣ or S/T 5+ ♦ 5+ ♣

3 ♣ !TRF, 6+ ♦

3 ♦	!TRF, 5 ♥ (332), choice of games

3 ♥	!SPL, 0–1 ♥ , 2–3 ♠ , 4–5 ♦ , 4–5 ♣

3 ♠	!SPL, 0–1 ♠ , 2–3 ♥ , 4–5 ♦ , 4–5 ♣

3NT !Choice of games, 22(54)

1 ♣ -1 ♦ -2NT

3 ♣ !Muppet STAY, 3+M

3 ♦	!TRF, 5+ ♥

3 ♥

2+ ♥

3 ♠	!(R), 0–3 ♠

3NT !TRF, 4+ ♠

3 ♠ 5+ ♠

3NT	0–1 ♥ , 0–4 ♠

3 ♥ !TRF, 5+ ♠
3NT S/O

4 ♦	!Choice of games, 5+ ♠ , 5+ ♥

4 ♥	!SPL, 0–1 ♥ , 2–3 ♠ , 4–5 ♦ , 4–5 ♣

4 ♠	!SPL, 0–1 ♠ , 2–3 ♥ , 4–5 ♦ , 4–5 ♣

4NT QUANT INV to 6NT

1 ♣ -1 ♦ -2NT-3 ♣

3 ♦

!(R), 4=M

3 ♥	!TRF, 4+ ♠

3 ♠

3= ♠

3NT 0–2 ♠

4 ♠	To play, 4+ ♠

3 ♠	!TRF, 4+ ♥

3NT To play

4 ♣	!S/T, 4+ ♠ , 4+ ♥

4 ♦	!Choice of games, 4+ ♠ , 4+ ♥

4NT QUANT INV to 6NT

3 ♥	!NEG, 0–3 ♠ , 0–3 ♥

3 ♠	!(R), 0–4 ♠

3NT !TRF, 5+ ♠
4NT QUANT INV to 6NT

3 ♠ 5+ ♠
- 4NT QUANT INV to 6NT

3NT	!TRF, 5+ ♥

4 ♣	!TRF, 5+ ♠

4 ♦ !PUP
4NT QUANT INV to 6NT

Positive 1M responses

Opener's 2 ♦ rebid is Odwrotka, a fit reverse showing a game-forcing 3+ card support.

The jump reverse of the other major shows a game-forcing minor two suiter to alleviate the burden on 2NT.

1 ♣ -1 ♥

1 ♠ F, 4+ ♠

1NT	2–3 ♠ , 2–3 ♥ , 2–4 ♦ , 3–5 ♣ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 0–3 ♥ , 12–17 HCP

2 ♦ !FG, 3+ ♥
2 ♥ 4= ♥ , 12–14 HCP

2 ♠	!FG, 5+ ♦ , 5+ ♣ , 18+ HCP

2NT	2–3 ♠ , 1–2 ♥ , 3–5 ♦ , 3–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 6+ ♦ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

3 ♠	!SPL, 0–1 ♠ , 4+ ♥

3NT	SOL 7+ ♣ , partial stops in ♠ and ♦

4 ♣	!SPL, 0–1 ♣ , 4+ ♥

4 ♦	!SPL, 0–1 ♦ , 4+ ♥

1 ♣ -1 ♠

1NT	2–3 ♠ , 2–4 ♥ , 2–4 ♦ , 2–5 ♣ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 12–17 HCP

2 ♦ !FG, 3+ ♠
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP

2NT	0–2 ♠ , 2–4 ♥ , 2–5 ♦ , 2–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 6+ ♦ , 18+ HCP

3 ♥	!FG, 5+ ♦ , 5+ ♣ , 18+ HCP

3 ♠	4+ ♠ , 4+ ♣ , 15–17 HCP

3NT	SOL 7+ ♣ , partial stops in ♥ and ♦

4 ♣	!SPL, 0–1 ♣ , 4+ ♠

4 ♦	!SPL, 0–1 ♦ , 4+ ♠

4 ♥	!SPL, 0–1 ♥ , 4+ ♠

1 ♣ -1 ♥ -1NT

2 ♣ !Roudi, INV 5+ ♥ or FG
2 ♦ S/O, 5+ ♦
2 ♥ S/O, 5+ ♥
2 ♠ FG, 4+ ♠
2NT INV, 4= ♥
3 ♣ INV, 4+ ♣
3 ♦ INV, 6+ ♦
3 ♥ INV, 6+ ♥

3 ♠	!SPL, 0–1 ♠ , 6+ ♥

3NT 4= ♥ , 12–15 HCP

4 ♣	!SPL, 0–1 ♣ , 6+ ♥

4 ♦	!SPL, 0–1 ♦ , 6+ ♥

1 ♣ -1 ♠ -1NT

2 ♣ !Roudi, INV 5+ ♠ or FG
2 ♦ S/O, 5+ ♦

2 ♥	INV, 4+ ♥ , 5+ ♠ , 10–11 HCP

2 ♠ S/O, 5+ ♠
2NT INV, 4= ♠
3 ♣ INV, 5+ ♣
3 ♦ INV, 6+ ♦

3 ♥	INV, 5+ ♥ , 5+ ♠

3 ♠ INV, 6+ ♠
3NT 4= ♠ , 12–15 HCP

4 ♣	!SPL, 0–1 ♣ , 6+ ♠

4 ♦	!SPL, 0–1 ♦ , 6+ ♠

4 ♥	!SPL, 0–1 ♥ , 6+ ♠

1 ♣ -1 ♥ -2 ♣

2 ♦	!INV+ 5+ ♥ or FG (R)

2 ♥

NF, 2–3 ♥

2 ♠	!FG, 6+ ♣ , 0–2 ♥

2NT NF NAT
3 ♣ NF, 6+ ♣
3 ♦ FG, 4+ ♦
3 ♥ FG, 3= ♥

2 ♥ 5+ ♥ , 7–9 HCP
2 ♠ !INV, 3+ ♣
2NT NAT INV
3 ♣ NF, 9–11 HCP
3 ♦ NF, 6+ ♦

1 ♣ -1 ♠ -2 ♣

2 ♦	!INV+ 5+ ♠ or FG (R)

2 ♥	!FG, 6+ ♣ , 0–2 ♠

2 ♠

NF, 2–3 ♠

2NT NF NAT
3 ♣ NF, 6+ ♣
3 ♦ FG, 4+ ♦
3 ♠ FG, 3= ♠

2 ♥	INV, 4+ ♥ , 5+ ♠

2 ♠ 5+ ♠ , 7–9 HCP
2NT NAT INV
3 ♣ NF, 9–11 HCP
3 ♦ NF, 6+ ♦

XYZ over 1 ♣ -1 ♥ -1 ♠

1 ♣ -1 ♥ -1 ♠

1NT 0–3 ♠ , 7–10 HCP
2 ♣ !NF XYZ (R), 7–11 HCP
2 ♦ !FG XYZ (R)
2 ♥ INV, 5= ♥ , 10–11 HCP
2 ♠ INV, 4+ ♠
2NT !TRF, 6+ ♣ , 7–9 HCP
3 ♣ INV, 5+ ♣ , 9–11 HCP
3 ♦ INV, 5+ ♦ , 9–11 HCP
3 ♥ INV, 6+ ♥
3 ♠ FG, 4+ ♠

3NT	0–3 ♠ , 4= ♥ , 0–5 ♦ , 0–5 ♣ , 12–15 HCP

1 ♣ -1 ♥ -1 ♠ -2 ♣
- Pass 6+ ♣ , 12–13 HCP
- 2 ♦ !NF (R), 12–16 HCP
- 2 ♥ FG, 53xx, 18+ HCP
- 2 ♠ FG, 5= ♠ , 18+ HCP
- 2NT INV, 4= ♠ , 15–17 HCP
- 3 ♣ INV, 5+ ♣ , 15–17 HCP
- 3 ♦ FG, 5+ ♦ , 18+ HCP
- 3NT S/O, 17+ HCP

1 ♣ -1 ♥ -1 ♠ -2 ♣ -2 ♦

Pass MIN, 6+ ♦ , 7–10 HCP
2 ♥ MIN, 5+ ♥ , 7–10 HCP
2 ♠ MIN, 4+ ♠

2NT	INV, 1–3 ♠ , 4= ♥ , 10–11 HCP

1 ♣ -1 ♥ -1 ♠ -2 ♦
- 2 ♥ 3= ♥ , 12–14 HCP
- 2 ♠ 5= ♠ , 18+ HCP
- 2NT 2= ♥ , 12–14 HCP
- 3 ♣ 5+ ♣ , 15+ HCP
- 3 ♦ 5+ ♦ , 18+ HCP
- 3 ♥ 53xx, 18+ HCP
- 3 ♠ 4144, 18+ HCP
- 3NT 42(52) or 42(43), 18+ HCP

Turning off FG XYZ by a passed hand

FG XYZ is off by a passed hand because game-forcing options become impossible. We simply move the 3 ♦ response to 2 ♦ .

1 ♣ -1 ♥ -1 ♠
- 2 ♦ INV, 5+ ♦ , 9–11 HCP

Roudi

Roudi is a French drop-in replacement for Checkback Stayman. Polish Club before 2020 used Magister, which is almost identical to Roudi. Despite that XYZ is taking over the world, we still use Roudi because opener is balanced and limited. Responder can park the contract better most of the time.

1X-1M-1NT-2 ♣
- 2 ♦ !MIN 2M
- 2 ♥ !MIN 3M
- 2 ♠ !MAX 3M
- 2NT !MAX 2M

Odwrotka with the strong 2 ♥ relay

We use the relay structure in Polish Club 2020: Expert. The 2 ♥ response to Odwrotka is a slam try with 11+ HCP or a certain fit and <= 8.0 NLTC.

1 ♣ -1M-2 ♦

2 ♥ !S/T (R)
- 2 ♠ !(R)
2 ♠ ! 4M, 7–10 HCP
- 2NT !(R)
2NT ! 5M, not BAL, 7–10 HCP
- 3 ♣ !(R)
3 ♣ ! 5+ ♣ , 4M, 9–11 HCP
3 ♦ ! 5+ ♦ , 4M, 9–11 HCP
3M !BAL 5M, 7–10 HCP
3oM !SPL, 0–1#, 6+M, 7–10 HCP

3NT	! 6+M, 2+oM, 2+ ♦ , 2+ ♣ , 7–10 HCP

4 ♣	!SPL, 0–1 ♣ , 6+M, 7–10 HCP

4 ♦	!SPL, 0–1 ♦ , 6+M, 7–10 HCP

1 ♣ -1M-2 ♦ -2 ♥ -2 ♠
- 2NT ! 4M
  - 3 ♣ !(R)
- 3 ♣ ! 4+ ♣ , 5M
- 3 ♦ ! 4+ ♦ , 5M
- 3M !BAL 5M
- 3oM ! 4+#, 5M
- 3NT !6+M, 2+ ♦ , 2+ ♣
- 4 ♣ !SPL, 0–1 ♣ , 6+M
- 4 ♦ !SPL, 0–1 ♦ , 6+M

1 ♣ -1 ♥ -2 ♦ -2 ♥ -2 ♠ -2NT-3 ♣
- 3 ♦ ! 4= ♦
- 3 ♥ ! 4= ♣
- 3 ♠ ! 44(xx)
- 3NT ! 3433

1 ♣ -1 ♠ -2 ♦ -2 ♥ -2 ♠ -2NT-3 ♣
- 3 ♦ ! 4= ♦
- 3 ♠ ! 4= ♣
- 3NT ! 4333

1 ♣ -1 ♥ -2 ♦ -2 ♠ -2NT
- 3 ♣ ! 5+ ♣ , 7–8 HCP
- 3 ♦ ! 5+ ♦ , 7–8 HCP
- 3 ♥ ! 1444
- 3 ♠ ! 44(xx)
- 3NT BAL

1 ♣ -1 ♠ -2 ♦ -2 ♠ -2NT
- 3 ♣ ! 5+ ♣ , 7–8 HCP
- 3 ♦ ! 5+ ♦ , 7–8 HCP
- 3 ♠ ! 4144
- 3NT BAL

1 ♣ -1M-2 ♦ -2NT-3 ♣
- 3 ♦ ! 4+ ♦
- 3M ! 4+ ♣
- 3oM ! 4+#

Balanced positive responses

Balanced positive responses are pretty descriptive, so opener's rebids are mostly natural.

1 ♣ -1NT

2 ♣ 4+ ♣ , 15+ HCP
2 ♦ 4+ ♦ , 18+ HCP
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 5+ ♠ , 18+ HCP

2NT	2–4 ♠ , 2–4 ♥ , 2–5 ♦ , 2–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 6+ ♦ , 18+ HCP
3 ♥ 7+ ♥ , 18+ HCP
3 ♠ 7+ ♠ , 18+ HCP

3NT	2–4 ♠ , 2–4 ♥ , 2–5 ♦ , 2–5 ♣ , 20–21 HCP

1 ♣ -2 ♠
- 2NT 12–13 HCP
- 3 ♣ 4+ ♣ , 15+ HCP
- 3 ♦ 4+ ♦ , 18+ HCP
- 3 ♥ 5+ ♥ , 18+ HCP
- 3 ♠ 5+ ♠ , 18+ HCP
- 3NT 13–14 or 18–19 HCP

1 ♣ -2NT
- 3 ♣ 4+ ♣
- 3 ♦ 4+ ♦ , 18+ HCP
- 3 ♥ 5+ ♥ , 18+ HCP
- 3 ♠ 5+ ♠ , 18+ HCP
- 3NT 12–14 HCP
- 4NT QUANT INV to 6NT, 18–19 HCP

Game-forcing 2m responses

Like over 2/1 responses, opener jumps with extra values to utilize higher steps to send information. This avoids an awkward situation Bridge World calls "two temporizers and zero describers".

1 ♣ -2 ♣

2 ♦ 4+ ♦
2 ♥ 4+ ♥
2 ♠ 4+ ♠

2NT	BAL, 2–3 ♠ , 2–3 ♥ , 12–14 or 21+ HCP

3 ♣ 5+ ♣

3 ♦	!SPL, 0–1 ♦ , 4+ ♣ , 15–17 HCP

3 ♥	!SPL, 0–1 ♥ , 4+ ♣ , 15–17 HCP

3 ♠	!SPL, 0–1 ♠ , 4+ ♣ , 15–17 HCP

3NT	BAL, 2–3 ♠ , 2–3 ♥ , 18–20 HCP

1 ♣ -2 ♦

2 ♥ 4+ ♥
2 ♠ 4+ ♠

2NT	BAL, 2–3 ♠ , 2–3 ♥ , 12–14 or 21+ HCP

3 ♣ 5+ ♣
3 ♦ 4+ ♦
3 ♥ 6+ ♥ , 18+ HCP
3 ♠ 6+ ♠ , 18+ HCP

3NT	BAL, 2–3 ♠ , 2–3 ♥ , 18–20 HCP

The 2 ♥ response

1 ♣ -2 ♥

2 ♠ S/P S/O, 2+ ♠ , 12–15 HCP
2NT FG (R)

3 ♣	INV, 0–2 ♠ , 0–3 ♥ , 5+ ♣ , 15–17 HCP

3 ♦	FG, 5+ ♦ , 0–2 ♠ , 0–3 ♥ , 18+ HCP

3 ♥ INV, 4+ ♥ , 15–17 HCP
3 ♠ INV, 3+ ♠ , 15–17 HCP

3NT	S/O, 0–2 ♠ , 1–3 ♥ , 3–5 ♦ , 3–5 ♣ , 18+ HCP

4 ♥ S/O, 4+ ♥ , 18+ points
4 ♠ S/O, 3+ ♠ , 18+ points
4NT QUANT INV to 6NT

Competitive bidding

Natural notrump does not make much sense over a takeout double. We use it as a cuebid to show a good club raise instead.

1 ♣ -(Dbl)

Rdbl	PEN, 2–4 ♠ , 2–4 ♥ , 2–4 ♦ , 2–4 ♣ , 10+ HCP

1 ♦ F, 5+ ♦
1 ♥ F, 4+ ♥
1 ♠ F, 4+ ♠
1NT !NF INV TRF, 5+ ♣ , 9–11 HCP
2 ♣ !NF, 5+ ♣ , 4–9 HCP
2X !PRE, 6+#, 4–9 HCP
2NT !FG TRF, 5+ ♣
3 ♣ !PRE, 7+ ♣ , 4–9 HCP
3X !PRE, 7+#, 4–9 HCP

Since 2NT is not the best contract especially in competition, we bid 1NT for balanced invitation instead and free 2NT as a forcing bid.

1 ♣ -(1 ♦ )

Dbl !TRF, 4+ ♥ , 7+ HCP
1 ♥ !TRF, 4+ ♠ , 7+ HCP
1 ♠ !TRF to 1NT, 7+ HCP
1NT INV, 9–11 HCP, likely stop in ♦
2 ♣ F1, 5+ ♣ , 10+ HCP

2 ♦	!T/O, 7–9 HCP, 5+ ♠ , 4+ ♥

2M PRE, 6+#, 4–9 HCP
2NT !FG, 12+ HCP, likely stop in ♦
3 ♣ INV, 6+ ♣ , 9–11 HCP

3 ♦	!FG, 12+ HCP, ask for ♦ stopper

3M PRE, 7+#, 4–9 HCP
3NT 33(43), 12–15 HCP, likely stop in ♦

1 ♣ -(1 ♥ )

Dbl !TRF, 4+ ♠ , 7+ HCP
1 ♠ !TRF to 1NT, 7+ HCP
1NT INV, 9–11 HCP, likely stop in ♥
2 ♣ F1, 5+ ♣ , 10+ HCP
2 ♦ F1, 5+ ♦ , 10+ HCP

2 ♥	!INV+ T/O, 10+ HCP, ask for ♥ stopper

2 ♠ PRE, 6+ ♠ , 4–9 HCP
2NT !FG, 12+ HCP, likely stop in ♥
3 ♣ INV, 6+ ♣ , 9–11 HCP
3 ♦ INV, 6+ ♦ , 9–11 HCP

3 ♥	!FG, 3(433), 12–15 HCP, ask for ♥ stopper

3 ♠ PRE, 7+ ♠ , 4–9 HCP
3NT 3(433), 12–15 HCP, likely stop in ♥

1 ♣ -(1 ♠ )

Dbl NEG, 4+ ♥ , 7+ HCP
1NT INV, 9–11 HCP, likely stop in ♠
2 ♣ F1, 5+ ♣ , 10+ HCP
2 ♦ F1, 5+ ♦ , 10+ HCP
2 ♥ NF, 5+ ♥ , 7–11 HCP

2 ♠	!INV+ T/O, 10+ HCP, ask for ♠ stopper

2NT !FG, 12+ HCP, likely stop in ♠
3 ♣ INV, 6+ ♣ , 9–11 HCP
3 ♦ INV, 6+ ♦ , 9–11 HCP
3 ♥ PRE, 7+ ♥ , 4–9 HCP

3 ♠	!FG, 3 ♥ (433), 12–15 HCP, ask for ♠ stopper

3NT	3 ♥ (433), 12–15 HCP, likely stop in ♠

We treat 1 ♣ -(1NT) like a weak notrump because nobody has bid a suit yet and a penalty double is sensible.

1 ♣ -(1NT)

Dbl PEN, 10+ HCP

2 ♣	!Landy, 4+ ♠ , 4+ ♥

2 ♦ 5+ ♦
2 ♥ 5+ ♥
2 ♠ 5+ ♠
2NT !UNT, 5+ ♦ , 5+ ♣
3 ♣ 6+ ♣

1 ♣ -(2 ♦ )

Dbl !OPT, BAL INV
2M To play, 5+#

2NT	!TRF Lebensohl

3 ♣

!NF (R)

3 ♦	!FG, 5+ ♣ , at most partial stop in ♦

3 ♥	!FG, 5+ ♥ , likely stop in ♦

3 ♠	!FG, 5+ ♠ , likely stop in ♦

3NT	!FG, 5+ ♣ , likely stop in ♦

3 ♦ !NF, 5+ ♣
3M FG, 5+#
3NT To play, 18+ HCP

3 ♣ !FG STAY
3 ♦ !TRF, INV+, 5+ ♥
3 ♥ !TRF, INV+, 5+ ♠
3 ♠ !FG, usually short ♦
3NT S/O, likely stop in ♦

1 ♣ -(2 ♥ )

Dbl !OPT, BAL INV
2 ♠ To play, 5+ ♠

2NT	!TRF Lebensohl

3 ♣

!NF (R)

3 ♦	To play, 6+ ♦

3 ♥	!FG, 5+ ♣ , at most partial stop in ♥

3 ♠	!FG, 5+ ♠ , likely stop in ♥

3NT	!FG, 5+ ♣ , likely stop in ♥

3 ♦ !NF, 5+ ♣
3 ♥ !FG, 5+ ♣
3 ♠ FG, 5+ ♠
3NT To play, 18+ HCP

3 ♣ !TRF, 5+ ♦
3 ♦ !FG STAY, 4+ ♠
3 ♥ !TRF, INV+, 5+ ♠
3 ♠ !FG, usually short ♥
3NT S/O, likely stop in ♥

1 ♣ -(2 ♠ )

Dbl !OPT, BAL INV

2NT	!TRF Lebensohl

3 ♣

!NF (R)

3 ♦ ♥

To play, 6+#

3 ♠	!FG, 5+ ♣ , at most partial stop in ♠

3NT	!FG, 5+ ♣ , likely stop in ♠

3 ♦ !NF, 5+ ♣
3 ♥ FG, 5+ ♥
3 ♠ !FG, 5+ ♣
3NT To play, 18+ HCP

3 ♣ !TRF, INV+, 5+ ♦
3 ♦ !TRF, INV+, 5+ ♥
3 ♥ !FG STAY, 4+ ♥
3 ♠ !FG, usually short ♠
3NT S/O, likely stop in ♠

We have this special unusual vs. unusual structure like 1NT-(2NT) because we have not yet bid a suit.

1 ♣ -(2NT)

Dbl	INV+, 2–4 ♠ , 2–4 ♥ , 2+ ♦ , 2+ ♣ , 10+ HCP

3 ♣ INV+, 5+ ♥ , 10+ points
3 ♦ INV+, 5+ ♠ , 10+ points
3 ♥ S/O, 5+ ♥ , 7–9 HCP
3 ♠ S/O, 5+ ♠ , 7–9 HCP

Over Transfer Walsh

The bidding structure over Transfer Walsh is largely the same as constructive bidding. Opener accepts transfer with a minimum 3-card support.

Deviating from Polish Club 2020: Expert, we don't keep Odwrotka in competition. The simple cuebid asks for a stopper, and the jump cuebid shows a forcing raise.

1 ♣ -(1 ♦ )-Dbl

1 ♥ 3= ♥ , 12–14 HCP
1 ♠ F, 4+ ♠
1NT BAL 2= ♥ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 0–3 ♥ , 12–17 HCP

2 ♦ !FG, 18+ HCP
2 ♥ 4= ♥ , 12–14 HCP
2 ♠ 6+ ♠ , 18+ HCP
2NT FG, 18+ HCP, stop in ♦
3 ♣ 6+ ♣ , 18+ HCP

3 ♦	!FG, 4+ ♥ , 2+ ♠ , 2+ ♦ , 2+ ♣ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

1 ♣ -(1 ♦ )-1 ♥

1 ♠ 3= ♠ , 12–14 HCP
1NT BAL 2= ♠ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 12–17 HCP

2 ♦ !FG, 18+ HCP
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP
2NT FG, 18+ HCP, stop in ♦
3 ♣ 6+ ♣ , 18+ HCP

3 ♦	!FG, 4+ ♠ , 2+ ♥ , 2+ ♦ , 2+ ♣ , 18+ HCP

3 ♥ 7+ ♥ , 18+ HCP

1 ♣ -(1 ♦ )-1 ♠
- 1NT 12–14 HCP
- 2 ♣ 4+ ♣ , 15+ HCP
- 2 ♦ !FG, 18+ HCP
- 2 ♥ 5+ ♥ , 18+ HCP
- 2 ♠ 5+ ♠ , 18+ HCP
- 2NT FG, 18+ HCP, stop in ♦
- 3 ♣ 6+ ♣ , 18+ HCP

1 ♣ -(1 ♥ )-Dbl

1 ♠ 3= ♠ , 12–14 HCP
1NT BAL 2= ♠ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 12–17 HCP

2 ♦ 5+ ♦ , 18+ HCP
2 ♥ !FG, 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP
2NT FG, 18+ HCP, stop in ♥
3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 7+ ♦ , 18+ HCP

3 ♥	!FG, 4+ ♠ , 2+ ♥ , 2+ ♦ , 2+ ♣ , 18+ HCP

1 ♣ -(1 ♥ )-1 ♠
- 1NT 12–14 HCP
- 2 ♣ 4+ ♣ , 15+ HCP
- 2 ♦ 5+ ♦ , 18+ HCP
- 2 ♥ !FG, 18+ HCP
- 2 ♠ 5+ ♠ , 18+ HCP
- 2NT FG, 18+ HCP, stop in ♥
- 3 ♣ 6+ ♣ , 18+ HCP

After 1 ♣ -1 ♦

1 ♣ -1 ♦ -(Dbl)

Rdbl 4+ ♦ , 15+ HCP
1 ♥ 4+ ♥ , 15–20 HCP
1 ♠ 4+ ♠ , 15–20 HCP

1NT	2–4 ♠ , 2–4 ♥ , 2–4 ♦ , 2–5 ♣ , 18–20 HCP

2 ♣ 5+ ♣ , 15–20 HCP

2 ♦	!NF, 0–4 ♠ , 0–4 ♥ , 21–23 HCP

2 ♥ 5+ ♥ , 21–23 HCP
2 ♠ 5+ ♠ , 21–23 HCP
2NT !FG, 24+ HCP
3 ♣ 6+ ♣ , 21–23 HCP
3 ♦ 6+ ♦ , 21–23 HCP

1 ♣ -1 ♦ -(1 ♥ )
- Dbl T/O, 15+ HCP
- 1 ♠ 5+ ♠ , 18–23 HCP
- 1NT 18–20 HCP, likely stop in ♥
- 2 ♣ 5+ ♣ , 15–20 HCP
- 2 ♦ 5+ ♦ , 18–23 HCP
- 2 ♥ !STR F, 21+ HCP
- 2 ♠ 7+ ♠ , 18–23 HCP
- 2NT 21–23 HCP, likely stop in ♥
- 3 ♣ 6+ ♣ , 21–23 HCP
- 3 ♦ 6+ ♦ , 21–23 HCP

1 ♣ -1 ♦ -(1 ♠ )
- Dbl T/O, 15+ HCP
- 1NT 18–20 HCP, likely stop in ♠
- 2 ♣ 5+ ♣ , 15–20 HCP
- 2 ♦ 5+ ♦ , 18–23 HCP
- 2 ♥ 5+ ♥ , 18–23 HCP
- 2 ♠ !STR F, 21+ HCP
- 2NT 21–23 HCP, likely stop in ♠
- 3 ♣ 6+ ♣ , 21–23 HCP
- 3 ♦ 6+ ♦ , 21–23 HCP

1 ♣ -1 ♦ -(1NT)
- Dbl PEN, 18+ HCP
- 2 ♣ 5+ ♣ , 18+ HCP
- 2 ♦ 5+ ♦ , 18+ HCP
- 2 ♥ 5+ ♥ , 18+ HCP
- 2 ♠ 5+ ♠ , 18+ HCP

1 ♣ -1 ♦ -(2 ♣ )
- Dbl OPT, 15+ HCP
- 2 ♦ 5+ ♦ , 18–23 HCP
- 2 ♥ 5+ ♥ , 18–23 HCP
- 2 ♠ 5+ ♠ , 18–23 HCP
- 2NT 21–23 HCP, likely stop in ♣
- 3 ♣ !ART FG
- 3 ♦ 7+ ♦ , 18–20 HCP
- 3 ♥ 7+ ♥ , 18–20 HCP
- 3 ♠ 7+ ♠ , 18–20 HCP
- 3NT 33(43), 24–26 HCP, likely stop in ♣

1 ♣ -1 ♦ -(2 ♦ )
- Dbl OPT, 15+ HCP
- 2 ♥ 5+ ♥ , 18–23 HCP
- 2 ♠ 5+ ♠ , 18–23 HCP
- 2NT 21–23 HCP, likely stop in ♦
- 3 ♣ 6+ ♣ , 18–23 HCP
- 3 ♦ !ART FG
- 3 ♥ 7+ ♥ , 18–20 HCP
- 3 ♠ 7+ ♠ , 18–20 HCP
- 3NT 33(43), 24–26 HCP, likely stop in ♦

1 ♣ -1 ♦ -(2 ♥ )
- Dbl OPT, 15+ HCP
- 2 ♠ 5+ ♠ , 18–23 HCP
- 2NT 21–23 HCP, likely stop in ♥
- 3 ♣ 6+ ♣ , 18–23 HCP
- 3 ♦ 6+ ♦ , 18–23 HCP
- 3 ♥ !ART FG
- 3 ♠ 7+ ♠ , 18–20 HCP
- 3NT 3(433), 24–26 HCP, likely stop in ♥

1 ♣ -1 ♦ -(2 ♠ )

Dbl OPT, 15+ HCP
2NT 21–23 HCP, likely stop in ♠
3 ♣ 6+ ♣ , 18–23 HCP
3 ♦ 6+ ♦ , 18–23 HCP
3 ♥ 5+ ♥ , 18–23 HCP
3 ♠ !ART FG

3NT	3 ♥ (433), 24–26 HCP, likely stop in ♠

1 ♣ -1 ♦ -(2NT)
- Dbl OPT, 15+ HCP
- 3 ♣ !F, 5+ ♥ , 21+ HCP
- 3 ♦ !F, 5+ ♠ , 21+ HCP
- 3 ♥ 5+ ♥ , 18–20 HCP
- 3 ♠ 5+ ♠ , 18–20 HCP
- 3NT 33(43), 22–25 HCP, partial stop in each minor

After 1 ♣ -1M

1 ♣ -1 ♥ -(Dbl)

Rdbl SUPP, 3= ♥
1 ♠ F, 4+ ♠
1NT BAL 2= ♥ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 0–3 ♥ , 12–17 HCP

2 ♦ 5+ ♦ , 18+ HCP
2 ♥ 4= ♥ , 12–14 HCP
2 ♠ 6+ ♠ , 18+ HCP

2NT	2–3 ♠ , 1–2 ♥ , 3–4 ♦ , 4–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 7+ ♦ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♥ -(1 ♠ )

Dbl SUPP, 3= ♥

1NT	BAL 2= ♥ , 12–14 HCP, likely stop in ♠

2 ♣	5+ ♣ , 0–2 ♥ , 12–17 HCP

2 ♦ 5+ ♦ , 18+ HCP
2 ♥ 4= ♥ , 12–14 HCP
2 ♠ 0–2 ♥ , 18+ HCP
2NT 18+ HCP, likely stop in ♠
3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 7+ ♦ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♥ -(1NT)

Dbl SUPP, 3= ♥

2 ♣	5+ ♣ , 0–3 ♥ , 12–17 HCP

2 ♦ 5+ ♦ , 18+ HCP
2 ♥ 4= ♥ , 12–14 HCP
2 ♠ 6+ ♠ , 18+ HCP

2NT	2–3 ♠ , 1–2 ♥ , 3–4 ♦ , 4–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 7+ ♦ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♥ -(2 ♣ )

Dbl SUPP, 3= ♥
2 ♦ 5+ ♦ , 18+ HCP
2 ♥ 4= ♥ , 12–14 HCP
2 ♠ 5+ ♠ , 18+ HCP
2NT 18+ HCP, likely stop in ♣
3 ♣ FG, 0–2 ♥ , 18+ HCP
3 ♦ 7+ ♦ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♥ -(2 ♦ )

Dbl SUPP, 3= ♥
2 ♥ 4= ♥ , 12–14 HCP
2 ♠ 5+ ♠ , 18+ HCP
2NT 18+ HCP, likely stop in ♦
3 ♣ 5+ ♣ , 15–17 HCP
3 ♦ FG, 0–2 ♥ , 18+ HCP

3 ♥	4+ ♥ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♥ -(2 ♠ )
- Dbl INV+ SUPP, 3+ ♥ , 15+ HCP
- 2NT 18+ HCP, likely stop in ♠
- 3 ♣ 5+ ♣ , 15–17 HCP
- 3 ♦ 5+ ♦ , 18+ HCP
- 3 ♥ 4+ ♥ , 12–14 HCP
- 3 ♠ FG, 0–2 ♥ , 18+ HCP

1 ♣ -1 ♥ -(3 ♣ )
- Dbl 15+ HCP
- 3 ♦ 5+ ♦ , 18+ HCP
- 3NT 18+ HCP, likely stop in ♣

1 ♣ -1 ♥ -(3 ♦ )
- Dbl 15+ HCP
- 3NT 18+ HCP, likely stop in ♦

1 ♣ -1 ♥ -(3 ♥ ♠ )
- Dbl 15+ HCP
- 3NT 18+ HCP, likely stop in ♠

1 ♣ -1 ♠ -(Dbl)

Rdbl SUPP, 3= ♠
1NT BAL 2= ♠ , 12–14 HCP

2 ♣	5+ ♣ , 0–3 ♠ , 12–17 HCP

2 ♦ 5+ ♦ or 0445, 18+ HCP
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP

2NT	1–2 ♠ , 2–4 ♥ , 2–4 ♦ , 3–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 6+ ♦ , 18+ HCP
3 ♥ 7+ ♥ , 18+ HCP

3 ♠	4+ ♠ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♠ -(1NT)

Dbl SUPP, 3= ♠

2 ♣	5+ ♣ , 0–3 ♠ , 12–17 HCP

2 ♦ 5+ ♦ or 0445, 18+ HCP
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP

2NT	1–2 ♠ , 2–4 ♥ , 2–4 ♦ , 3–5 ♣ , 18+ HCP

3 ♣ 6+ ♣ , 18+ HCP
3 ♦ 6+ ♦ , 18+ HCP
3 ♥ 7+ ♥ , 18+ HCP

3 ♠	4+ ♠ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♠ -(2 ♣ )

Dbl SUPP, 3= ♠
2 ♦ 5+ ♦ , 18+ HCP
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP
2NT 18+ HCP, likely stop in ♣
3 ♣ FG, 0–2 ♠ , 18+ HCP
3 ♦ 7+ ♦ , 18+ HCP
3 ♥ 7+ ♥ , 18+ HCP

3 ♠	4+ ♠ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♠ -(2 ♦ )

Dbl SUPP, 3= ♠
2 ♥ 5+ ♥ , 18+ HCP
2 ♠ 4= ♠ , 12–14 HCP
2NT 18+ HCP, likely stop in ♦
3 ♣ 5+ ♣ , 15–17 HCP
3 ♦ FG, 0–2 ♠ , 18+ HCP
3 ♥ 7+ ♥ , 18+ HCP

3 ♠	4+ ♠ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♠ -(2 ♥ )

Dbl SUPP, 3= ♠
2 ♠ 4= ♠ , 12–14 HCP
2NT 18+ HCP, likely stop in ♥
3 ♣ 5+ ♣ , 15–17 HCP
3 ♦ 5+ ♦ , 18+ HCP
3 ♥ FG, 0–2 ♠ , 18+ HCP

3 ♠	4+ ♠ , 4+ ♣ , 15–17 HCP

1 ♣ -1 ♠ -(3 ♣ )
- Dbl 18+ HCP
- 3 ♦ 5+ ♦ , 18+ HCP
- 3 ♥ 5+ ♥ , 18+ HCP
- 3NT 18+ HCP, likely stop in ♣

1 ♣ -1 ♠ -(3 ♦ )
- Dbl 18+ HCP
- 3 ♥ 5+ ♥ , 18+ HCP
- 3NT 18+ HCP, likely stop in ♦

1 ♣ -1 ♠ -(3 ♥ ♠ )
- Dbl 18+ HCP
- 3NT 18+ HCP, likely stop in ♥

We still play the support double over 1C-1M-(2M). We think the support double is superior to unusual vs. unusual.

1 ♣ -1 ♥ -(2 ♥ )
- Dbl INV+ SUPP, 3+ ♥ , 15+ HCP
- 2 ♠ FG, 0–2 ♥ , 18+ HCP
- 2NT 18+ HCP, likely stop in ♠
- 3 ♣ 5+ ♣ , 15–17 HCP
- 3 ♦ 5+ ♦ , 18+ HCP
- 3 ♥ 4= ♥ , 12–14 HCP

1 ♣ -1 ♠ -(2 ♠ )
- Dbl INV+ SUPP, 3+ ♠ , 15+ HCP
- 2NT 18+ HCP, likely stop in ♥
- 3 ♣ 5+ ♣ , 15–17 HCP
- 3 ♦ 5+ ♦ , 18+ HCP
- 3 ♥ FG, 0–2 ♠ , 18+ HCP
- 3 ♠ 4= ♠ , 12–14 HCP

It is another story over 1C-1M-(2NT). We no longer have a chance to stop at 2NT after a double.

1 ♣ -1 ♥ -(2NT)
- Dbl PEN, 15+ HCP
- 3 ♣ INV, 4+ ♥ , 15–17 HCP
- 3 ♦ FG, 3+ ♥ , 18+ HCP
- 3 ♥ 4= ♥ , 12–14 HCP
- 3 ♠ 5+ ♠ , 18+ HCP

1 ♣ -1 ♠ -(2NT)
- Dbl PEN, 15+ HCP
- 3 ♣ INV, 4+ ♠ , 15–17 HCP
- 3 ♦ FG, 3+ ♠ , 18+ HCP
- 3 ♥ 5+ ♥ , 18+ HCP
- 3 ♠ 4= ♠ , 12–14 HCP

The 1 ♦ opening

1 ♦

1 ♥ F, 4+ ♥
1 ♠ F, 4+ ♠
1NT NAT, 4+ ♣ , 7–10 HCP

2 ♣	FG, 4+ ♣ or 4+ ♦ , 12+ HCP

2 ♦ CONST, 3–4 ♦ , 7–10 HCP

2 ♥	!P/C, 4+ ♥ , 5+ ♠ , 7–9 HCP

2 ♠	!INV, 4+ ♦ or 6+ ♣ , 10–11 HCP

2NT BAL INV, 10–11 HCP

3 ♣	!Mixed raise, 4+ ♦ , 8–9 HCP

3 ♦ !PRE, 4+ ♦ , 5–7 HCP

3 ♥	!SPL, 0–1 ♥ , 4+ ♦ , 12–15 HCP

3 ♠	!SPL, 0–1 ♠ , 4+ ♦ , 12–15 HCP

3NT To play, 12–15 HCP

The 1M responses

1 ♦ -1 ♥

1 ♠ F, 4+ ♠
1NT BAL, 12–14 HCP

2 ♣	4+ ♣ , 5+ ♦ , 12–17 HCP

2 ♦ 6+ ♦ , 12–14 HCP
2 ♥ 4+ ♥ , 12–14 HCP
2 ♠ !F, 3= ♥ , 15+ HCP

2NT	0–3 ♠ , 0–2 ♥ , 18+ HCP

3 ♣	5+ ♣ , 5+ ♦ , 15–17 HCP

3 ♦ 6+ ♦ , 15–17 HCP
3 ♥ INV, 4+ ♥

3NT	SOL 7+ ♦ , partial stops in ♠ and ♣

1 ♦ -1 ♠

1NT NAT, 12–14 HCP
2 ♣ 4+ ♣ , 12–17 HCP
2 ♦ 5+ ♦ , 12–14 HCP

2 ♥	!F, 4+ ♥ or 3= ♠ , 15+ HCP

2 ♠ 4+ ♠ or 3451, 12–14 HCP

2NT	0–2 ♠ , 0–3 ♥ , 18+ HCP

3 ♣	5+ ♣ , 5+ ♦ , 15–17 HCP

3 ♦ 6+ ♦ , 15–17 HCP

3 ♥	5+ ♥ , 6+ ♦ , 12–14 HCP

3 ♠ INV, 4+ ♠

3NT	SOL 7+ ♦ , partial stops in ♥ and ♣

The precedence with 15–17 HCP is 4-card support > 4-card side suit > 3-card support. Therefore, the reverse in the other major showing 3-card support promises either 6+ ♦ or 18+ HCP.

Wolff signoff

Wolff signoff is a conventional 3 ♣ over 2NT rebid. Such 3 ♣ puppets to 3 ♦ , and responder is ready to sign off at the 3-level.

1 ♦ -1 ♥ -2NT

3 ♣	!PUP, to play 3 ♦ or 3 ♥

3 ♦ FG, 2+ ♦
3 ♥ FG, 6+ ♥

3 ♠	FG, 5+ ♠ , 6+ ♥

1 ♦ -1 ♠ -2NT

3 ♣	!PUP, to play 3 ♦ or 3 ♠

3 ♦ FG, 2+ ♦

3 ♥	FG, 5+ ♥ , 5+ ♠

3 ♠ FG, 6+ ♠

Lebensohl over reverses

1 ♦ -1 ♥ -2 ♠

2NT !PUP, ready to S/O at 3X

3 ♣	!Ask for ♠ stopper or S/T in ♥

3 ♦ FG, 2+ ♦
3 ♥ INV, 5+ ♥
3 ♠ !Ask for ♣ stopper

Our advantage over Polish Club 2020: Expert is that we can disambiguate between variants of 1 ♦ -1 ♠ -2 ♥ below 3 ♦ .

1 ♦ -1 ♠ -2 ♥

2 ♠ NF, 5+ ♠

2NT

!(R)

3 ♣ !NF, 4+ ♥

3 ♦	!NF, 3= ♠ , 6+ ♦

3 ♣ !4SF
3 ♦ FG, 3+ ♦
3 ♥ FG, 4+ ♥
3 ♠ FG, 6+ ♠

Competitive bidding

1 ♦ -(Dbl)

Rdbl BAL 2–4 ♦ , 10+ HCP
1 ♥ F, 4+ ♥
1 ♠ F, 4+ ♠
1NT NAT, 4+ ♣ , 7–10 HCP
2 ♣ F1, 5+ ♣ , 10+ HCP
2 ♦ 3–4 ♦ , 7–10 HCP
2 ♥ PRE, 6+ ♥
2 ♠ PRE, 6+ ♠
2NT !INV+, 4+ ♦ , Truscott

3 ♣	!Mixed raise, 4+ ♦ , 8–10 HCP

1 ♦ -(1 ♥ )

Dbl !TRF, 4+ ♠ , 7+ HCP
1 ♠ !TRF to 1NT
1NT 7–10 HCP, likely stop in ♥
2 ♣ F1, 5+ ♣ , 10+ HCP
2 ♦ 3–4 ♦ , 7–10 HCP
2 ♥ INV+, 3+ ♦
2 ♠ PRE, 6+ ♠ , 4–9 HCP
2NT INV, 10–11 HCP, likely stop in ♥

3 ♣	!Mixed raise, 4+ ♦ , 8–10 HCP

3 ♦ !PRE, 4+ ♦ , 5–8 HCP

1 ♦ -(1 ♠ )

Dbl NEG, 4+ ♥ , 7+ HCP
1NT 7–10 HCP, likely stop in ♠
2 ♣ F1, 5+ ♣ , 10+ HCP
2 ♦ 3–4 ♦ , 7–10 HCP
2 ♥ F1, 5+ ♥ , 10+ HCP
2 ♠ INV+, 3+ ♦
2NT INV, 10–11 HCP, likely stop in ♠

3 ♣	!Mixed raise, 4+ ♦ , 8–10 HCP

3 ♦ !PRE, 4+ ♦ , 5–8 HCP

Major suit openings

1 ♥

1 ♠ F, 4+ ♠ , 5+ HCP
1NT NF, 0–3 ♥ , 7–11 HCP
2 ♣ FG, 4+ ♣ or STR 3433
2 ♦ FG, 4+ ♦
2 ♥ 3+ ♥ , 8.5–9.5 NLTC
2 ♠ !INV, (54)+ in minors, 9–11 HCP
2NT !FG, 4+ ♥
3 ♣ !INV, 4+ ♥
3 ♦ !CONST, 4+ ♥
3 ♥ !PRE, 4+ ♥

3 ♠	!FG SPL, 0–1 ♠ , 4+ ♥

3NT !Choice of games, 33(43), 12–15 HCP

4 ♣	!FG SPL, 0–1 ♣ , 4+ ♥

4 ♦	!FG SPL, 0–1 ♦ , 4+ ♥

4 ♥ PRE, 4+ ♥

We swap 2 ♣ and 2 ♥ over 1 ♠ , inspired by Twisted 2/1 by Ting-Yu Ye (TpKotoba).

When there are 5 hearts in 1 ♠ -1NT, it must be an invitation without a spade fit.

1 ♠

1NT	NF, 0–3 ♠ , 0–5 ♥ , 7–11 HCP

2 ♣	! 5+ ♥ 7+ HCP or FG 4+ ♥

2 ♦ FG, 4+ ♦ or STR 4333
2 ♥ !FG, 4+ ♣
2 ♠ 3+ ♠ , 8.5–9.5 NLTC
2NT !FG, 4+ ♠

3 ♣	!INV or S/T, 0–1 ♦ or 0–1 ♥ , 4+ ♠

3 ♦	!INV or S/T, 0–1 ♣ , 4+ ♠

3 ♥ !INV or S/T, 4+ ♠
3 ♠ !CONST, 4+ ♠
3NT !Choice of games, 3(433), 12–15 HCP
4X !FG SPL, 0–1#, 4+ ♠
4 ♠ PRE, 4+ ♠

1 ♠ -2 ♣

2 ♦	!(R), MIN 5= ♠ 0–1 ♥ or MAX 3+ ♥

2 ♥ MIN, 2–3 ♥
2 ♠ MIN, 6+ ♠
2NT MAX, 5233
3 ♣ MAX, 4+ ♣
3 ♦ MAX, 4+ ♦
3 ♥ MIN, 4+ ♥
3 ♠ MAX, 6+ ♠

Note that we use difference 4-card raising structures for 1 ♥ and 1 ♠ . Our spade raises cover all mini-Splinters and a mixed raise. On the other hand, we use reverse Bergen raises for hearts for several reasons:

1 ♠ -3 ♣
- 3 ♦ INV, decline a ♦ SPL
- 3 ♥ INV, decline a ♥ SPL

1 ♠ -3 ♦
- 3 ♥ F1, 4+ ♥

Natural invitational 2/1 by passed hand

We don't play Drury here. For a 3-card limit raise without a 5-card side suit, 1NT is decent.

1 ♥
- 2 ♣ INV, 5+ ♣
- 2 ♦ INV, 5+ ♦

1 ♠
- 2 ♣ INV, 5+ ♣
- 2 ♦ INV, 5+ ♦
- 2 ♥ INV, 5+ ♥

Competitive bidding

1 ♥ -(Dbl)
- Rdbl BAL 2–3 ♥ or 4144, 10+ HCP
- 1 ♠ F, 5+ ♠
- 1NT !TRF, 5+ ♣
- 2 ♣ !TRF, 5+ ♦
- 2 ♦ !FG or weak, 3+ ♥
- 2 ♥ CONST, 3+ ♥ , 8.5–9.0 NLTC
- 2 ♠ !INV, (54)+ in minors, 9–11 HCP
- 2NT !INV+, 4+ ♥ , Truscott

1 ♠ -(Dbl)
- Rdbl BAL 2–3 ♠ or 1444, 10+ HCP
- 1NT !TRF, 5+ ♣
- 2 ♣ !TRF, 5+ ♦
- 2 ♦ !TRF, 5+ ♥
- 2 ♥ !FG or weak, 3+ ♠
- 2 ♠ CONST, 3+ ♠ , 8.5–9.0 NLTC
- 2NT !INV+, 4+ ♠ , Truscott

Strong notrump opening

We use the French-style 4-way transfers to preserve the natural invitation. We invite naturally rather than via Stayman because 2NT hides information of the declarer.

The responder tries to show a major first always (MAFIA). The only exception is not to bid Stayman with (4333), a hand so flat that playing notrump is a better idea.

1NT

2 ♣ !STAY, may be Garbage
2 ♦ !TRF, 5+ ♥
2 ♥ !TRF, 5+ ♠

2 ♠	!TRF, 6+ ♣ or S/T 4+ ♦ 4+ ♣

2NT NAT INV
3 ♣ !TRF, 6+ ♦

3 ♦	!Choice of games, 5+ ♠ , 5+ ♥

3 ♥	!SPL, 0–1 ♥ , 2–3 ♠ , 4–5 ♦ , 4–5 ♣

3 ♠	!SPL, 0–1 ♠ , 2–3 ♥ , 4–5 ♦ , 4–5 ♣

3NT S/O
4 ♣ !Gerber, ask for aces
- 4 ♦ ! 0 or 4 aces
- 4 ♥ ! 1 ace
- 4 ♠ ! 2 aces
- 4NT ! 3 aces
4 ♦ !Texas TRF, 6+ ♥
4 ♥ !Texas TRF, 6+ ♠

4 ♠	!FG, 5+ ♦ , 5+ ♣

4NT QUANT INV to 6NT
5NT QUANT INV to 7NT

Stayman

Excluding opener's 5-card majors, the Stayman has its traditional meaning or a Garbage Stayman.

1NT-2 ♣

2 ♦	! 2–3 ♠ , 2–3 ♥

2 ♥ 4= ♥

2 ♠	4= ♠ , 2–3 ♥

The Garbage Stayman takes advantage of that opener will eventually rebid within 2 ♠ ♥ ♦ , so we can bid 2 ♣ as a weak takeout of clubs and pass in the next round.

1NT-2 ♣ -2X

Pass	WK, 4= ♠ , 4= ♥ , 4–5 ♦ , 0–1 ♣

We only employ Smolen transfers at the 3-level. The 2-level invitations are natrual so that we have a chance to stop at 2 ♥ .

1NT-2 ♣ -2 ♦

2 ♥	INV, 5+ ♥ , 4+ ♠

2 ♠	INV, 5+ ♠ , 4+ ♥

2NT INV
3 ♣ FG, 5+ ♣
3 ♦ FG, 5+ ♦
3 ♥ !FG, Smolen TRF, 54(xx)
3 ♠ !FG, Smolen TRF, 45(xx)
3NT S/O
4 ♣ !Gerber, ask for aces

4 ♦	!Texas TRF, 6+ ♥ , 4+ ♠

4 ♥	!Texas TRF, 6+ ♠ , 4+ ♥

4NT QUANT INV to 6NT
5NT QUANT INV to 7NT

The step of 1NT-2 ♣ -2 ♥ -2 ♠ allows us to always choose the better major fit. This is why the opener rebids 2 ♥ with 44 majors.

1NT-2 ♣ -2 ♥

2 ♠	F2NT, 5+ ♠ , 4+ ♥

2NT INV, 0–3 ♥ , 4= ♠

3 ♣	FG, 5+ ♣ , 0–3 ♥ , 4= ♠

3 ♦	FG, 5+ ♦ , 0–3 ♥ , 4= ♠

3 ♥ INV, 4+ ♥

3 ♠	!S/T, 4+ ♥ , 2+ ♦ , 2+ ♣

3NT S/O, 0–3 ♥ , 4= ♠

4 ♣	!S/T SPL, 0–1 ♣ , 4+ ♥

4 ♦	!S/T SPL, 0–1 ♦ , 4+ ♥

4 ♥ S/O, 4+ ♥
4NT QUANT INV to 6NT, 0–3 ♥
5NT QUANT INV to 7NT, 0–3 ♥

1NT-2 ♣ -2 ♠

2NT INV, 0–3 ♠ , 4= ♥

3 ♣	FG, 5+ ♣ , 0–3 ♠ , 4= ♥

3 ♦	FG, 5+ ♦ , 0–3 ♠ , 4= ♥

3 ♥	!S/T, 4+ ♠ , 2+ ♦ , 2+ ♣

3 ♠ INV, 4+ ♠
3NT S/O, 0–3 ♠ , 4= ♥

4 ♣	!S/T SPL, 0–1 ♣ , 4+ ♠

4 ♦	!S/T SPL, 0–1 ♦ , 4+ ♠

4 ♠ S/O, 4+ ♠
4NT QUANT INV to 6NT, 0–3 ♠
5NT QUANT INV to 7NT, 0–3 ♠

Jacoby transfer

The opener always accepts Jacoby transfers. We super-accept with maximum and 4 trumps. We hide the doubleton just below the trump to avoid retransferring problems like 1NT-2 ♦ -3 ♦ !-3 ♥ ?.

1NT-2 ♦

2 ♥

(R)

2 ♠ INV, 5+ ♠
2NT INV, 5= ♥

3 ♣

FG, 4+ ♣

3 ♠	! 2= ♥ , 4+ ♣

3 ♦

FG, 4+ ♦

3 ♠	! 2= ♥ , 4+ ♦

3 ♥ INV, 6+ ♥

3 ♠	!SPL, 0–1 ♠ , 6+ ♥

3NT P/C, 5= ♥

4 ♣	!SPL, 0–1 ♣ , 6+ ♥

4 ♦	!SPL, 0–1 ♦ , 6+ ♥

4 ♥	Mild S/T, 6+ ♥ , 2+ ♠ , 2+ ♦ , 2+ ♣

4NT QUANT INV to 6NT
5NT QUANT INV to 7NT

2 ♠	!MAX, 2= ♠ , 4= ♥

3 ♦ !Retransfer

2NT !MAX, 3433
- 3 ♦ !Retransfer

3 ♣	!MAX, 2= ♣ , 4= ♥

3 ♦ !Retransfer

3 ♥	!MAX, 2= ♦ , 4= ♥

1NT-2 ♥

2 ♠

(R)

2NT INV, 5= ♠

3 ♣

FG, 4+ ♣

3 ♥	! 2= ♠ , 4+ ♣

3 ♦

FG, 4+ ♦

3 ♥	! 2= ♠ , 4+ ♦

3 ♥ S/T, 5+ ♥
3 ♠ INV, 6+ ♠
3NT P/C, 5= ♠

4 ♣	!SPL, 0–1 ♣ , 6+ ♠

4 ♦	!SPL, 0–1 ♦ , 6+ ♠

4 ♥	!SPL, 0–1 ♥ , 6+ ♠

4 ♠	Mild S/T, 6+ ♠ , 2+ ♥ , 2+ ♦ , 2+ ♣

4NT QUANT INV to 6NT
5NT QUANT INV to 7NT

2NT !MAX, 4333
- 3 ♥ !Retransfer

3 ♣	!MAX, 2= ♣ , 4= ♠

3 ♥ !Retransfer

3 ♦	!MAX, 2= ♦ , 4= ♠

3 ♥ !Retransfer

3 ♠	!MAX, 2= ♥ , 4= ♠

Seeking a major fit

There are apparent overlaps between major fit seeking conventions, especially Jacoby transfers with Stayman or Texas transfers. This section describes how to pick the best response.

Major two suiter, (54)+

To find the better fit, we consider the length difference between majors in our partnership. The opener's difference is at most 2, so our basic strategy is

However, with a weak hand, it is more important to keep the bidding low. We transfer to our longer major and then pass.

Same lengths, 55+

We choose the hearts from a weak two suiter for a chance to run out to 2 ♠ unless spades are sufficiently better.

Difference 1–2, (54)+

Major single suiter, 6+

Minor transfer

With an invitation or a game force without slam interest, we only show minor suits with a singleton or void.

1NT-2 ♠

2NT	!INV, 4+ ♣ or MAX 3+ ♣

3 ♣ S/O

3 ♦	S/T, 4+ ♦ , 4+ ♣

3 ♥	!FRAG, 0–1 ♠ , 6+ ♣

3 ♠	!FRAG, 0–1 ♥ , 6+ ♣

3NT	!FRAG, 0–1 ♦ , 6+ ♣

4 ♠	!Retransfer, 6+ ♣

3 ♣

(R)

3 ♦	S/T, 4+ ♦ , 4+ ♣

3 ♥	!FRAG, 0–1 ♠ , 6+ ♣

3 ♠	!FRAG, 0–1 ♥ , 6+ ♣

3NT	!FRAG, 0–1 ♦ , 6+ ♣

1NT-3 ♣ -3 ♦
- 3 ♥ !FRAG, 0–1 ♠
- 3 ♠ !FRAG, 0–1 ♥
- 3NT !FRAG, 0–1 ♣

Competitive bidding

1NT-(2X)

3NT S/O
4 ♣ !Gerber, ask for aces
4 ♦ !Texas TRF, 6+ ♥
4 ♥ !Texas TRF, 6+ ♠

4 ♠	!FG, 5+ ♦ , 5+ ♣

Over (Dbl)

1NT-(Dbl)
- Rdbl INV+
- 2X 5+#

Over (2 ♣ )

We play systems on over 1NT-(2 ♣ ). Most bids keep the same meaning. This is because 2 ♣ is so low that we can treat it as (mirrored) (1 ♣ )-1NT.

1NT-(2 ♣ )
- Dbl !STAY, may be Garbage
- 2 ♦ !TRF, 5+ ♥
- 2 ♥ !TRF, 5+ ♠
- 2 ♠ !TRF, 6+ ♣ or BAL INV
- 2NT !TRF, 6+ ♦

We recommend Leaping Michaels over a sole anchor suit. Take natural clubs for example.

1NT-(2 ♣ )

3 ♣	!INV+, 6+ ♦ , at most partial stop in ♣

3 ♦	!FG, 5+ ♠ , 5+ ♥

3 ♥	!FG, 5+ ♥ , 5+ ♦

3 ♠	!FG, 5+ ♠ , 5+ ♦

The real headache is when (2 ♣ ) shows both majors e.g. Landy. We recommend reverse unusual vs. unusual.

1NT-(2 ♣ )
- Dbl Suggest penalizing either major
- 2 ♦ To play, 5+ ♦
- 2 ♥ !INV+, 5+ ♦
- 2 ♠ !INV+, 5+ ♣
- 2NT !INV+, 4+ ♦ , 5+ ♣
- 3 ♣ To play, 6+ ♣
- 3 ♦ To play, 6+ ♦
- 3 ♥ !Ask for ♥ stopper
- 3 ♠ !Ask for ♠ stopper

Note that we pass when we can penalize both majors. A delayed double is for penalty since a takeout can usually penalize the other major.

Over (2 ♦ ♥ ♠ )

1NT-(2 ♦ )

Dbl !OPT, BAL INV
2M S/O, 5+#

2NT	!TRF Lebensohl

3 ♣

!NF (R)

3 ♦	!FG, 5+ ♣ , at most partial stop in ♦

3 ♥	!FG, 5+ ♥ , likely stop in ♦

3 ♠	!FG, 5+ ♠ , likely stop in ♦

3NT	!FG, 5+ ♣ , likely stop in ♦

3 ♦ !NF, 5+ ♣

3 ♣ !FG STAY
3 ♦ !TRF, INV+, 5+ ♥
3 ♥ !TRF, INV+, 5+ ♠
3 ♠ !FG, usually short ♦
3NT S/O, likely stop in ♦

1NT-(2 ♥ )

Dbl !OPT, BAL INV
2 ♠ S/O, 5+ ♠

2NT	!TRF Lebensohl

3 ♣

!NF (R)

3 ♦ S/O

3 ♥	!FG, 5+ ♣ , at most partial stop in ♥

3 ♠	!FG, 5+ ♠ , likely stop in ♥

3NT	!FG, 5+ ♣ , likely stop in ♥

3 ♦ !NF, 5+ ♣

3 ♣ !TRF, 5+ ♦
3 ♦ !FG STAY, 4+ ♠
3 ♥ !TRF, INV+, 5+ ♠
3 ♠ !FG, usually short ♥
3NT S/O, likely stop in ♥

1NT-(2 ♠ )

Dbl !OPT, BAL INV

2NT	!TRF Lebensohl

3 ♣

!NF (R)

3 ♦ ♥

S/O

3 ♠	!FG, 5+ ♣ , at most partial stop in ♠

3NT	!FG, 5+ ♣ , likely stop in ♠

3 ♦ !NF, 5+ ♣

3 ♣ !TRF, INV+, 5+ ♦
3 ♦ !TRF, INV+, 5+ ♥
3 ♥ !FG STAY, 4+ ♥
3 ♠ !FG, usually short ♠
3NT S/O, likely stop in ♠

Over (2NT)

We have a special unusual vs. unusual structure over 1NT-(2NT) because we have not yet shown a suit.

1NT-(2NT)

Dbl	INV+, 2–4 ♠ , 2–4 ♥ , 2+ ♦ , 2+ ♣

3 ♣ INV+, 5+ ♥
3 ♦ INV+, 5+ ♠
3 ♥ S/O, 5+ ♥
3 ♠ S/O, 5+ ♠

Ekren 2 ♣

Ekren is an artificial preempt showing 4+ cards in each major. This preempt is not only frequent (5–6%) but also frees major preempts from the other major. Ekren is slightly less frequent than a wild 5-card natural preempt (6–7%) but much more frequent than a traditional 6-card preempt (2.2–2.7%).

Ekren is originally at 2 ♦ . We move it to 2 ♣ to fill in the removed Precision and leave space for Multi.

Unlike natural preempts, we have 2NT as a nonforcing natural invitation. Since Ekren hands can be fairly balanced, 2NT can be the sweet spot on misfit.

2 ♣

2 ♦

!(R)

2 ♥ MIN
2 ♠ MIN, 5+ ♠

2NT	!MAX, 5+ ♠ , 5+ ♥

3 ♣ !MAX, 44(xx)

3 ♦	!MAX TRF, 5+ ♥

3 ♥	!MAX TRF, 5+ ♠

2M S/O
2NT !NF NAT

3 ♣

!FG (R)

3 ♦ ! 44(xx)

3 ♥	!Smolen, 5+ ♠

3 ♠	!Smolen, 5+ ♥

3NT	! 5+ ♠ , 5+ ♥

3 ♦ !NF NAT

Multi 2 ♦

2 ♦
- 2 ♥ P/C
- 2 ♠ P/C
- 2NT !INV+ (R)
- 3 ♣ F, 5+ ♣
- 3 ♦ F, 5+ ♦
- 3 ♥ P/C
- 3 ♠ P/C
- 3NT S/O
- 4 ♣ !(R)
  - 4 ♦ TRF, 6+ ♥
  - 4 ♥ TRF, 6+ ♠
- 4 ♦ !(R)
  - 4 ♥ 6+ ♥
  - 4 ♠ 6+ ♠
- 4 ♥ S/O
- 4 ♠ S/O

2 ♦ -2NT
- 3 ♣ !MIN, 6+ ♥
- 3 ♦ !MIN, 6+ ♠
- 3 ♥ !MAX, 6+ ♠
- 3 ♠ !MAX, 6+ ♥

Muiderberg twos

Weak twos in this bidding system show exactly 5 cards in the bid major and 4+ cards in an unspecified minor. Multi 2 ♦ already takes care of 6+ cards.

Non-jump new suits are non-forcing because sometimes we need to escape from a certain misfit. With a strong misfit and a lower-ranking suit, we tend to buy 3NT with a minor suit. Otherwise, we go through 2NT and try to introduce hearts in the next round.

2 ♥
- 2 ♠ !NF, 5+ ♠
- 2NT !INV+
- 3 ♣ !P/C
- 3 ♦ !INV+, 3+ ♥

2 ♠
- 2NT !INV+
- 3 ♣ !P/C
- 3 ♦ !INV+, 3+ ♠

2M-2NT
- 3 ♣ MIN, 4+ ♣
- 3 ♦ MIN, 4+ ♦
- 3 ♥ !MAX, 4+ ♣
- 3 ♠ !MAX, 4+ ♦

Unusual 2NT opening

2NT
- 3 ♣ To play
- 3 ♦ To play
- 3 ♥ !FG (R)
- 3 ♠ !INV+ PUP
- 3NT To play
- 4X To play
- 4NT !Equal preference between 5 ♣ ♦

2NT-3 ♥
- 3 ♠ !SPL, 0–1 ♠
- 3NT !SPL, 0–1 ♥
- 4 ♣ 1156
- 4 ♦ 1165
- 4 ♥ !MIN SPL, 0= ♥
- 4 ♠ !MIN SPL, 0= ♠

2NT-3 ♠ -3NT

4 ♣ INV, 3+ ♣
4 ♦ INV, 3+ ♦

5 ♣	!S/T, 3+ ♣ , voluntary bid

6 ♣	♣ KQ or better

7 ♣ ♣ AKQ

5 ♦	!S/T, 3+ ♦ , voluntary bid

6 ♦	♦ KQ or better

7 ♦ ♦ AKQ

BTU 4-level preempts

In National Taiwan University Bridge Club (BTU), we use a 4X scheme that conveys approximately 0.58 more bits than traditional or Meckwell Namyats.

4X
- 4NT RKCB 0314
- 5m !CTRL ASK
  - 1step No CTRL
  - 2steps 2nd-round CTRL
  - 3steps 1st-round CTRL

4m
- 4M P/C
- 5M P/C
- 6M P/C

4 ♣
- 4 ♦ !(R)
  - 4M NAT MIN, 7.0+ NLTC
  - 4NT !MAX, CTRL in every side suit
  - 5m !MAX, no CTRL in this suit
  - 5M !MAX, no CTRL in oM

Litten Polish Club

Notable differences from Polish Club 2020: Expert

Constructive auctions

Preempts

Slam try

References

Hand evaluation

Stopper

References

Opening bids

The notrump ladder

Polish 1 ♣ opening

The 1 ♦ relay

Positive 1M responses

XYZ over 1 ♣ -1 ♥ -1 ♠

Turning off FG XYZ by a passed hand

Roudi

Odwrotka with the strong 2 ♥ relay

Balanced positive responses

Game-forcing 2m responses

The 2 ♥ response

Competitive bidding

Over Transfer Walsh

After 1 ♣ -1 ♦

After 1 ♣ -1M

The 1 ♦ opening

The 1M responses

Wolff signoff

Lebensohl over reverses

Competitive bidding

Major suit openings

Natural invitational 2/1 by passed hand

Competitive bidding

Strong notrump opening

Stayman

Jacoby transfer

Seeking a major fit

Major two suiter, (54)+

Same lengths, 55+

Difference 1–2, (54)+

Major single suiter, 6+

Minor transfer

Competitive bidding

Over (Dbl)

Over (2 ♣ )

Over (2 ♦ ♥ ♠ )

Over (2NT)

Ekren 2 ♣

Multi 2 ♦

Muiderberg twos

Unusual 2NT opening

BTU 4-level preempts