The use of a cue bid in the opponent’s suit, in response to an overcall by partner, to show at least a sound minimum raise of partner’s suit, thus releasing direct raises to be used competitively or pre-emptively.
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West’s 2♣ bid shows three (sometimes more) spades and fair values (typically 10+ points). The bid neither shows nor denies a particular holding in opener’s suit, hence the name ‘unassuming’. West might hold:
![](https://bernardmageebridge.com/wp-content/uploads/2021/11/image-315.png)