CS System
CS System is a bridge bidding system, was invented by Mr. Chaitad Suriya, who was Thai national team. CS stands for "Complete System" and also "Chaitad Suriya". By a word "Complete", the system integrates points, shapes, and losers altogether.
Fundamental
| Opening |
HCP |
Losers |
Details |
| 1♣ |
13-18 |
5-7 |
♣ (0+), unbalanced hand, no 5 cards major |
| 1♦ |
16-21 |
4-6 |
♦ (0+), any distribution |
| 1♥, 1♠ |
12-15 |
5-7 |
5-cards suit unbalanced hand |
| 1NT |
13-15 |
7-8 |
balanced or semi balanced hand |
| 2♣ |
21+ |
0-4 |
balanced or semi balanced hand |
| 16+ |
0-3 |
any distribution unbalanced hand G/F |
| 2♦ |
6-12 |
7-8 |
♥ or ♠ (6+), weak |
| 2♥, 2♠ |
12-15 |
5-6 |
6-cards suit unbalanced hand with two top honors or three of five |
| 2NT |
21-22 |
|
balanced or semi balanced hand |
| 3♣ |
12-15 |
3.5-4.5 |
♣ 5-cards + ♥ or ♠ 5-cards |
| 3♦ |
12-15 |
3.5-4.5 |
♦ 5-cards + ♥ or ♠ 5-cards |
| 3♥, 3♠ |
6-12 |
6-7 |
7-cards suit preemptive |
| 3NT |
|
4-5 |
Gambling, solid 7-card minor suit leading with AKQ, no more than 1 K outside |
| 4♣ |
12-15 |
3.5-4.5 |
♣ 5-cards + ♦ 5-cards |
| 4♦ |
12-15 |
3.5-4.5 |
♥ 5-cards + ♠ 5-cards |
Advantages
- System is more precise than other systems which have wide range of points. CS System range is 3 or 6 points in opening bid and 3 points in first rebid with clear distribution, the responder completely knows the potential contract which is either part score or game.
- System is not vulnerable to preemptive bids and overcalls. According to limited range of points and clear distribution, a player completely knows the hand and can place the right contract.
- System provides more information for bidding game and slam not only from points. Because the system incorporates number of losers into a hand in every bidding, a responder can easily use cover cards to find the chances of game and slam.
Disadvantages
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