Weak two bid
AUCTION · CONVENTIONS
An opening of 2♦, 2♥, or 2♠ showing a good 6-card suit and 5–10 HCP — the mildest preempt.
2♠ with ♠KQJ973 and little else.
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Adapted from Wikipedia’s Glossary of contract bridge terms · CC BY-SA 4.0 — our adapted text is shared under the same license.