Polish 1♣

This Polish Club has 3 variants:

  • 12–14, 2–4♠, 2–4♥, 2–4♦, 2–4♣
  • 12–17, 5+♣ or 4414
  • 18+, not suitable for 1♦

Note that 2♣ is no longer natural since Polish Club 2020: Expert. 1♣ takes care of all ♣-suited hands.

I move invitational hands out of 1♣-1♦ relay to make it non-forcing. I believe this method is more resilient to interference.

1♣-Quasi-NAT or 18+
1♦!NF ART NEG, 0–9
1♥F, 7+, 4+♥
1♠F, 7+, 4+♠
1NTBAL CONST, 8–10, 2–3♠, 2–3♥, 2–5♦, 2–5♣
2♣FG, 5+♣
2♦FG, 5+♦
2♥!P/C, 7–9, 4+♥, 5+♠
2♠!INV, 10–11, 0–3♠, 0–3♥, 2–5♦, 2–5♣
2NT!FG, 2–3♠, 2–3♥, 3–4♦, 3–4♣
3♣INV, 9–11, 6+♣
3♦INV, 9–11, 6+♦
3MPRE, 3–6, 7+#
3NT12–15, 33(43)
4♣!PRE, S-SOL 8+M, 0–1 outside A/K
4♦!PRE, SOL 8+M, no outside A/K
4MPRE, 8+#

P-1♣

Game-forcing responses degenerate to corresponding invitations.

P-1♣-Quasi-NAT or 18+
2♣INV, 5+♣, 0–3♠, 0–3♥
2♦INV, 5+♦, 0–3♠, 0–3♥
2♠!UNBAL INV, 0–3♠, 0–3♥, 4–5♦, 4–5♣
2NTBAL INV, 2–3♠, 2–3♥, 2–5♦, 2–5♣