Defense against strong artificial openings

1C or 2C openings

• Pass: Any strong hand or weak but not suitable for obstruction
• DBL: Hearts and a minor
• D: Spades and a minor
• NT: Both majors
• Jump NT: Both minors
• Other: Natural

2D opening or artificial response to 1C/2C

• Pass: Any strong hand or weak but not suitable for obstruction
• DBL: Natural
• NT: Both majors
• Jump NT: Both minors
• Other: Natural

A bid of NT by the partner of the intervening player is the only forcing bid available.