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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)