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Precision Club Bidding System

This is the most conventional one among the Bidding Systems. Developed by C.C.Wei from Taiwan in 1963 and with the successes of Taiwanian National Team, it is spreaded all over the world.

The system is based on strong Club opennings and it includes 5 cards major and weak NoTrump opennings. 1 Club openning is completely artificial, so it should not be passed. You can examine the first and second tour biddings at the table below.

Opener
Points
Distribution
Responder
Points
Distribution
1 Club
16+ HCP
22-23 HCP
Any
Unbalanced
1 Diamond
1 Major
2 Minors
2 Majors
3 Suits
1 NT
2 NT
 
3 NT
0-7 HCP
8+ HCP
8+ HCP
4-7 HCP
4-7 HCP
8-10 HCP
11-13 HCP or 16+ HCP
14-15 HCP
Any
At least 5 cards
At least 5 cards
At least 6 cards
At least 7 cards
Balanced
Balanced
Balanced
Balanced
1 Diamond
11-15 HCP
At least 3 cards
1 Major
2 Minors
2 Majors
3 Clubs
3 Diamonds
1 NT
2 NT
3 NT
8-15 HCP
11-15 HCP
6-7 HCP
16+ HCP
8-10 HCP
8-10 HCP
16+ HCP
14-15 HCP
At least 4 cards
At least 4 cards
At least 4 cards
Unbalanced
At least 5 cards
No 4 cards major
Artificial
No 4 cards major
1 Heart
11-15 HCP
At least 5 cards
1 Spade
2 Minors
2 Heart
2 Spades
3 Minors
3 Hearts
1 NT
2 NT
3 NT
8-15 HCP
11-15 HCP
8-10 HCP
16+ HCP
16+HCP
11-13 HCP
8-15 HCP
16+ HCP
14-15 HCP
At least 4 cards
At least 4 cards
At least 3 cards
At least 5 cards
At least 5 cards
At least 3 cards
-
Artificial
3 cards support
1 Spade
11-15 HCP
At least 5 cards
2 Minors
2 Hearts
2 Spade
3 Shifting
3 Spades
1 NT
2 NT
3 NT
11-15 HCP
11-15 HCP
8-10 HCP
16+HCP
11-13 HCP
8-15 HCP
16+ HCP
14-15 HCP
At least 4 cards
At least 5 cards
At least 3 cards
At least 5 cards
At least 3 cards
Balanced
Artificial
3 cards support
2 Clubs
11-15 HCP
At least 6 cards,
Or 5 cards + a 4 cards major
2 Diamonds
2 Majors
3 Clubs
3 Suit
2 NT
3 NT
11+ HCP
0-9 HCP
11+ HCP
14+ HCP
10-11 HCP
14-16 HCP
Artificial
At least 6 cards
At least 3 cards
At least 5 cards
Balanced
Balanced
2 Diamonds
11-15 HCP
4414, 4315, 3415, 4405 distribution
2 Majors
3 Clubs
3 Diamonds
3 Majors
2 NT
3 NT
0-7 HCP
0-7 HCP
11-12 HCP
5-7 HCP
8+ HCP
11-13 HCP
At least 4 cards
At least 4 cards
At least 6 cards
At least 5 cards
Artificial
6 cards Diamonds
2 Spades,
2 Hearts
7-10 HCP
6 cards
Natural
 
 
3 Suits
6-10 HCP
7 cards
Simple support
At least 3 winers
At least 2 cards
1 NT
13-15 HCP
No 5 cards major, balanced hand
 
2 Clubs
2 Diamonds
2 Majors
3 Minors
3 Major
4 Clubs
2 NT
3 NT
4 NT
8-11 HCP
12+ HCP
Weak
Weak
13+ HCP
Gerber
11-12 HCP
Game
18+ HCP
Stayman
Stayman
At least 6 cards
At least 6 cards
At least 5 cards
Balanced
Balanced
Balanced
Slam Invitation
2 NT
22-23 HCP
Balanced
3 Clubs
3 Diamonds,
3 Hearts
4 Clubs
3 NT
4 NT
3+ HCP
-
 
Gerber
Game
10+ HCP
Stayman
Jacoby Transfer
Jacoby Transfer
Balanced
Balanced
Slam Invitation
3 NT
Gambling 3 NT
At least 7 cards of a solid minor
4 Clubs
4 Diamonds
5 Clubs
Pass or correct
Slam invitation
Game invitation
Unbalanced
Support to minors

You can examine the second tour bidding from the table below
Opener
Responder
Opener
Explanation
Responder
Explanation
1 Club
1 Diamond
1 NT
 
 
2 NT
 
 
 
3 NT
New Suit
 
 
 
 
Jump New Suit
16-18 Balanced
 
 
19-21 Balanced
 
 
 
24-27 Balanced
16-21 OP
At least 5 cards
 
 
 
22+ At least 5 cards
2 Clubs
2 Suit
3 Suit
3 Clubs
3 Diamonds and Hearts
3 Pik
4 Clubs
Simple support
Jump support
New suit
NT
Jump NT
Simple support
Jump support
NT
New Suit
Stayman
Transfer
weak, long suit
Stayman
Transfer
 
5-5 Minör
Stayman
2-4 At least 3 cards
5-7 At least 3 cards
5-7 At least 5 cards
2-4 No support
5-7 No support
0-3 At least 3 cards
4-7 At least 4 cards
0-3 No support
4-7 At least 5 cards
1 Club
New Suit
New Suit
 
NT
Jump Suit
At least 5 cards, forcing
No support
19-21 At least 3 cards
Natural
 
Natural
Natural
1 Club
1 NT
2 Clubs
2 Suit
Stayman
At least 5 cards
 
  
1 Club
2 NT
3 Clubs
Stayman
3rd level answers
4th level answers
11-13 HCP
16+ HCP
1 Club
3 NT
4 Clubs
Stayman
 
  
1 Diamond
1 Major
 
2 Minors
Natural 11-13 HCP
Jump 14-15 OP
Shows major stoppers, bid NT for both majors, otherwise supports. With 14-15 points he can jump with these biddings
1 Diamond
2 NT
3 Clubs
3 Diamond
3 Major
3 NT
Unbalanced minimum
Balanced maximum
Unbalanced maximum
Balanced minimum
 
  
1 NT
2 Diamonds
4 cards major or 5 cards minor or 2 NT
3 Clubs over 2 NT asks distribution;
Answers of the Opener:
3 Diamonds for 3343, 3 Hearts for 2344,     3 Spades for 3244, 3 NT for 3334
2 Clubs
2 Diamonds
2 Majors
2 NT
 
 
 
3 Clubs
 
3 Diamond
4 cards major, 11-13 HCP
6 cards of Clubs, 11-13 HCP and stopper on the other two suits. Responder may ask the stoppers by bidding 3 Diamonds.  The answers are 3 Hearts for Diamond and Hearts, 3 Spades for Diamond and Spades, 3 NT for Hearts and Spades.
6 cards of Clubs, 11-13 HCP and stopper on one of the other suits. He declares if the responder asks with 3 Diamonds
6-5 minor distribution
2 Diamond
2 NT
3 Clubs
 
3 Diamond
 
 
3 Hearts
3 Spades
3 NT
 
4 Clubs
4 Diamond
3415 distribution
 
4315 distribution
 
 
4414 11-13 HCP
4414 14-15 HCP
4414 14-15 HCP and only one Ace
4405 11-13 HCP
4405 14-15 HCP
3 Diamonds asks the points, Opener bids 3 Hearts with 11-13, 3 Spades with 14-15.
3 Hearts asks the points, Opener bids 3 Spades with 11-13, 3 NT with 14-15.

The second table includes the artificial 2nd tour biddings. You can consider that other biddings not included are natural.