From Bridge World Standard:
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E. Competition After Our Minor-Suit Opening
(See also section F., below)
After our minor-suit opening and a takeout double:
(a) a one-level new-suit response is forcing (by an unpassed hand);
(b.) one diamond — (double) — two clubs is not forcing;
(See also section F., below)
After our minor-suit opening and a takeout double:
(a) a one-level new-suit response is forcing (by an unpassed hand);
(b.) one diamond — (double) — two clubs is not forcing;