Negative 1♦

In our version of Polish Club, the 1♦ relay denies invitational values. This relay contains weak hands without another suitable bid.

Strength	Distribution
0–6	Any
7–9	0–3♠, 0–3♥

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

1♣-1♦-	0–9
P	BAL MIN, 4=♦
1♥	F, 12–19, 4+♥ or BAL MIN 3=♥
1♠	F, 12–19, 4+♠
1NT	BAL, 18–20, 2–4♠, 2–4♥, 2–6♦, 2–6♣
2♣	NF, 12–20, UNBAL 5+♣
2♦!	NF, 21–23, 1–4♠, 1–4♥, 0–5♦, 0–5♣
2♥	FG, 20–23, 5+♥
2♠	FG, 20–23, 5+♠
2NT	FG, 24+
3♣	FG, 21–23, 6+♣
3♦	FG, 21–23, 6+♦
3♥!	SPL, 21–23, 40(54)
3♠!	SPL, 21–23, 04(54)
3NT!	Gambling, SOL 7+♣, likely stops in two side suits

1♣-1♦-1M

Given that Polish Club is a 5-card major system, the major suit left in 1♣-1♦-1M gets longer when stronger.

Strength	Length
12–14	4=# or occasional UNBAL 3=#
15–17	4=# or occasional 5+# 6+♣
18–19	5+# or UNBAL 4=#

I reuse 2NT for the most pesky hands in the range of 1♣-1♦.

1♣-1♦-1M-	12–19, usually 4+M
1NT	BAL, 5–7, 1–3M
2M	NF, 4–6, 4–5# or UNBAL 3=#
2NT!	UNT, 7–9, usually 5+♦ 5+♣
3♣	MAX, 7–9, 6+♣
3♦	MAX, 7–9, 6+♦
3M	NF, 4–6, 5+#

1♣-1♦-1♥-	12–19, usually 4+♥
1♠	NF, 4–6, 4+♠
2♠	NF, 4–6, 6+♠

1♣-1♦-1♠-	12–19, usually 4+♠
2♥	NF, 4–6, 5+♥

1♣-1♦-1NT

1♣-1♦-1NT-	BAL 18–20
2♣!	STAY, Garbage STAY, or INV 5=♠
2♦!	TRF, 5+♥
2♥!	TRF, 5+♠
2♠!	Minor suit Multi/STAY, 6+m or FG 4+♦ 4+♣
2♠-2NT	1–3♦, 1–3♣
2♠-3♣!	4+♦
2♠-3♦!	4+♣
2NT	NAT INV
3♣	INV, 6+♣
3♦	INV, 6+♦
3♥!	INV, 5+♠, 5+♥
3♠!	Choice of games, 5+♠, 5+♥
4♣!	Gerber BW
4♦!	Texas TRF, 6+♥
4♥!	Texas TRF, 6+♠

1♣-1♦-2♣

The 2♣ rebid is wide, but worry not. Lebensohl fits in this reverse-like auction.

1♣-1♦-2♣-	12–20, UNBAL 5+♣
2♦	NF, 5–9, 6+♦
2♥	NF, 4–6, 5+♥
2♠	NF, 4–6, 5+♠
2NT!	LEB, 5–7, 3+♣ or 7+♦
3♣	NF, 7–9, 4+♣
3♦	NF, 7–9, 7+♦

1♣-1♦-2♦

The 2♦ rebid shows a nearly balanced hand with 21–23 HCP. If you can force to game, bid as if partner opened a natural 2NT. Otherwise, try to sign off at the 2-level.

1♣-1♦-2♦-	21–23, 1–4♠, 1–4♥
P	To play, usually 5+♦
2♥	NF, 4+♥
2♠	NF, 4+♠
2NT	S/O
3♣!	FG, STAY
3♦!	TRF, 5+♥
3♥!	TRF, 5+♠
3♠!	Minor suit Multi/STAY, 6+m or FG 4+♦ 4+♣
3NT	S/O

1♣-1♦-2NT

Opener forces to game single-handedly by rebidding 2NT. The shape of such a strong hand is predominantly balanced. I would treat it as a strong notrump that allows 5-card major.

1♣-1♦-2NT-	24+
3♣!	Muppet STAY, 3+M
3♦!	Muppet TRF, 5+♥
3♥!	TRF, 5+♠
3NT	S/O
4♣!	Gerber BW
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

Muppet Stayman is an ambitious convention that tries to find both 5-3 and 4-4 major fits. It swaps 3♥ and 3NT steps from Puppet Stayman to find 3-5 spades. Note that responder rebids 3♠ to deny spades. This gadget, similar to Smolen, lets opener declare.

1♣-1♦; 2NT-3♣-	Muppet STAY
3♦!	(R), 4=M
3♥!	NEG, 0–3♠, 0–3♥
3♥-3♠!	(R), 0–4♠
3♥-3NT!	TRF, 5+♠
3♠	5+♠
3NT!	TRF, 5+♥

Muppet Stayman also affects transfer to hearts to find 4-4 spade fit. Again, responder rebids 3♠ to deny spades.

Opener can reject the transfer with 3NT. Such entitlement is why I choose Muppet over Romex. Romex Stayman allows a garbage variant, but it is not very useful here because the auction is already game-forcing.