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Natural (2X)

(2Y)-NAT
X!T/O, 12+
2ZNAT, 12–17, 5+#
2NTNAT, 16–18
3XNAT, 14–18, often 6+#
3YAsk for stopper, SOL 7+ suit or STR T/O
3ZNAT, 15–17, 6+#
(2m)-NAT
4m!Leaping Michaels, 5+♠, 5+♥
4om!Leaping Michaels, 5+M, usually 5+#
4NT!NF S/T in om
(2M)-NAT
3M!Ask for stopper, SOL 7+ suit or STR 4+♣ 4+♦
4m!Leaping Michaels, 5+oM, usually 5+#
4M!Leaping Michaels, 5+♦, 5+♣, usually unstopped
4NT!NF UNT with stopper, 5+♦, 5+♣

(2♣)-X

I don’t recommend Rumpelsohl for (2♣)-X. It works better at (2♦♥♠). I have a better yet simple plan: Rubens advances.

(2♣)-X-T/O
2XNAT NF
2NTNAT INV
3♣!INV+ TRF, 5+♦
3♦!INV+ TRF, 5+♥
3♥!INV+ TRF, 5+♠
3♠!FG, usually 6+♦