Crash Convention

It is an intervention convention against 1 Club strong opennings in Precision Club and the other strong Club Bidding Systems. Originally developed by Kit Woolsey ve Steve Robinson, and then some versions have been created.  You can study the original and the other versions from the tables below.

Opener	Opponent	Explanation
1 Club	1 Diamond 1 Heart 1 Spade 1 NT	2 long suits in same color 2 long suits in Majors or Minors May be a weak Spade 2 mixed suits ( Spade and Diamond or Heart and Club)

 

Opener	Opponent	Explanation
1 Club	1 Diamond 1 Heart 1 Spade 1 NT 2 Clubs 2 Spades	2 long suits in same color 2 long suits in Majors or Minors May be a weak Spade Single suited hand. The other opponent asks the suit by bidding 2 Clubs Weak triple suited hand 2 mixed suits ( Spade and Diamond or Heart and Club)

 

Opener	Opponent	Explanation
1 Club	Double 1 Diamond 1 Heart 1 Spade 1 NT 2 Clubs 2 Diamonds	2 long suits in same color 2 long suits in Majors or Minors Natural, single suited hand with at least 5 cards of Hearts Natural, single suited hand with at least 5 cards of Spades 2 mixed suits ( Spade and Diamond or Heart and Club) Natural, single suited hand with t least 5 cards of Clubs Natural, single suited hand with at least 5 cards of Diamonds

 

Opener	Opponent	Explanation
1 Club	Double 1 Diamond 1 Heart 1 Spade 1 NT 2 Suits	5 Cards of Hearts and at least 10 HCP 5 Cards of Spades and at least 10 HCP 2 long suits in same color 2 long suits in Majors or Minors 2 mixed suits ( Spade and Diamond or Heart and Club) Transfer

This convention has been arranged to be utilized against 1 NT opennings by the same partnership. It is known as Crash Convention Over One No Trump and the application is as follows. 

Opener	Opponent	Explanation
1 NT	2 Clubs 2 Diamonds 2 Hearts 2 Spades 2 NT	2 long suits in same color 2 long suits in Majors or Minors Natural, single suited hand Natural, single suited hand 2 mixed suits ( Spade and Diamond or Heart and Club)