As an opening Edit
- An opening of 1♠ promises 4 or 5 ♠s, depending whether a 4 or 5-card major is being used. However, even in a 4-card major system, a 1♠ opening normally shows 5 ♠s since lower openings are preferred with 4-card suits.
As a response Edit
As an overcall Edit
- A 1♠ overcall normally specifies 5 good ♠s (occasionally 4 very good ♠s) and 8-16 HCPs.