Bridge Bidding System
Modified 19/03/2026
Table of Contents
Opening Bids Summary
1
♣
Opening
Responses to 1
♣
Developments After 1
♣
- 1
♦
Developments After 1
♣
- 1
♥
Developments After 1
♣
- 1
♠
Competition over 1
♣
Opening
1
♦
Opening
Responses to 1
♦
Developments After 1
♦
- 1
♥
Developments After 1
♦
- 1
♠
Developments After 1
♦
- 1NT
Developments After 1
♦
- 2
♣
1
♥
Opening
Responses to 1
♥
Developments After 1
♥
- 1
♠
Developments After 1
♥
- 1NT
Developments After 1
♥
- 2
♣
/2
♦
Competition After 1
♥
Opening
1
♠
Opening
Responses to 1
♠
Developments After 1
♠
- 1NT
Developments After 1
♠
- 2
♣
/
♦
/
♥
Competition After 1
♠
Opening
1NT Opening (15-17)
Responses and Rebids
2NT Opening (20-21)
Strong 2
♣
Opening
After Interference
Weak 2 Opening
Conventions
Non-competitive Part
Inverted Minors
Jacoby 2NT
Two suit showing after 1NT opening
Reverse Bids
Help Suit Game Try and Trump Game Try
Slam Bidding
5NT Pick a Slam
Roman Key Card Blackwood (RKCB)
DOPI/ROPI and DEPO
Exclusion Blackwood(ERKCB)
Defensive Biddings
The 2-suit Overcalls
Defensive Against The 2-suit Overcalls
Lebensohl over Weak 2-Bids
Intervention Against 1NT Opening
Defense Against 1NT Overcall
Defense Against Interference Over Drury
Defense Against Interference Over 1NT
Defense if the 1NT Opening or Overcall is Dbld for Penalty
Defense Against Interference Over a Weak Two Opening
Sandwich 1NT
Defense against multi 2
♦
Defense against transfer response system
Signals
Attitude Signals
Count Signals
Suit Preference Signals
Discarding
Smith echo