Conventions card Funbridge

 For 5 cards Major, weak 2 system / ACOL standard / American Standard (SAYC) / Polish system
Specificity of the WBridge5 engine

For 5 cards Major, weak 2 system

SYSTEM SUMMARY : BASIC PRINCIPLES
5-CARD MAJOR - Best minor (4 3 3 3 open 1 ; 4 4 3 2 open 1 ; 4 1 4 4 open 1
1NT : 15-17 balanced hand with no 5-card major
2 : Strong artificial, balanced 22-23Hcp, 7 / 18-22Hcp or 5 / with 18-22Hcp
2 : Game forcing, 24Hcp any distribution or 17Hcp with at least 9 tricks.
2 , 2 : weak 6 cards, 6-10Hcp
 
The software doesn't play those conventions : 2NT showing fit after 1 major, 2 Landy, Truscott, 4th suit forcing, 2 Drury.
 
In response, a jump in a new suit shows a very good suit with 16+HCP, after pass it shows a maximum hand (9-11) with 5 cards in the suit and 4 in the opening suit.
 
After a 1 or 1 response, 3NT by the opener shows 18-19 balanced with 4 cards in the major response.
 
A big jump in a new suit is a splinter : showing shortness and a big fit in your suit.
 
The sequence 1 2
                   2 3 is non forcing
 
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.
 
The answers to the 2 checkback stayman : (After opener bids 1NT and responder 2 )
2 : minimum without 3 cards in the major
2 : 3 cards in the major, maximum if partenair bids 1 , else minimum
2 : 3 cards in the major, minimum if partenair bids 1 , else maximum
2SA : maximum without 3 cards in the major
 
After 1NT opening, if the partner bids 2 , the following is :
If opener bids 2 : 2 and 2 are invitationnal with 5 cards, 3 and 3 are forcing with 5 cards and 4 cards in the other major.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2NT : 3 and 3 are invitationnal, 4 and 4 are to play, 4 and 4 are double transfert, 3 and 3 are showing slam try in and
 

PREEMPTIVE BIDS
3NT : Gambling, 7-card solid minor suit with no external tenace
3 , 3 , 3 , 3 : Standard Preemptive Bid - good 7-card suit with no opening value, 4 /4 : 7+ solid /

SPECIAL DOUBLES
Negative Double on any opponents' openining except 1NT
Take out Double up to 2
1 - 1 - Double : precisely 4 cards in
1 / - 1 - Double : precisely 4 card in

OVERCALLS
Style : natural, limited to 17/18 HCP
At least five cards for a level-1 overcall and six cards for a level-2 overcall
Negative Double with an opening bid value and tolerance in other suits, or at least 18 points, with any distribution.
Jump overcalls : preempts
Overcalls on 1NT : Natural
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.

OPENING LEAD : STYLE
  Opening Lead In the partner's suit
Suit
3rd and 5th
3rd and 5th
NT
4th Best
4th Best
Subsequent leads in NT : Low from an honnor, 4th best attitude
 
Discards are also 3rd / 5th most of the time in a suit you doesn't want.

SLAM BIDS AND CONVENTIONS
4NT Blackwood asking for Aces : 3/0 - 4/1 - 2 then 5NT asking for Kings : 3/0 - 4/1 - 2
Sometimes 1st or 2nd rank tenace

DETAIL OF THE DIFFERENT BIDS
Bids
Description
 Responses
Points
Number of cards
Description
Pass
0-11
****
No points
  
1
12-23
3 or more
Natural
 Natural. 2 , 2 , 2 = strong
1
12-23
3 or more
Natural
 Natural. 2 , 2 , 3 = strong
1
12-23
5 or more
Natural
 Natural. 2 , 3 , 3 = strong
1
12-23
5 or more
Natural
 Natural. 3 , 3 , 3 = strong
1NT
15-17
At least 2 in each suit
No 5-card Major

2 Stayman
2 , 2 , 2 , 3 = Jacoby Transfer
3 , 3 , 3 = Natural and Strong
4 = Average 5/5 Major

2
18-23
****

Strong :

  • 18-22 with 6 , 6 , 7 or 7
  • 21-23 with 5 or 5
  • balanced 22-23
2 mandatory relay asking for partner's distribution.
2
24
****
  • 24 points or more.
  • 9 tricks in major and 16 HCP or more
  • 10 tricks in minor and 16 HCP or more
2 = No Ace and less than 8 points, maximum 1 king
2 = Ace or Ace
2NT = At least 8 points or 2 kings
3 = Ace
3 = Ace
3NT = 2 Aces
2
6-10
Precisely 6
At least 2 high-cards in the suit
 Natural, 2NT strong relay
2
6-10
Precisely 6
At least 2 high-cards in the suit
 Natural, 2NT strong relay
2NT
20-21
At least 2 in each suit
No five-card major
3 Stayman
3 , 3 , 3 , 4 = Jacoby Transfer
4 = Average 5/5 Major
4 , 4 , 5 , 5 = Natural average hand
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3NT
9-12
Precisely
7 or 7
A 7-card minor headed with AKQ
 4 to escape to the partner's minor
5 to bid the game in the partner's minor
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
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ACOL Standard

SYSTEM SUMMARY : BASIC PRINCIPLES
4-CARD MAJOR - The opening is always in the longest suit
1NT : 12-14 balanced hand with no 5-card major
2 : Game Forcing
2 , 2 , 2 : Strong 2 , good suit at least 5 cards and 21-23 HCP or 6 cards and 18-22 HCP
 
The software doesn't play those conventions : 2NT showing fit after 1 major, 2 Landy, Truscott, 4th suit forcing, 2 Drury.
 
In response, a jump in a new suit shows a very good suit with 16+HCP, after pass it shows a maximum hand (9-11) with 5 cards in the suit and 4 in the opening suit.
 
After a 1 or 1 response, 3NT by the opener shows 18-19 balanced with 4 cards in the major response.
 
A big jump in a new suit is a splinter : showing shortness and a big fit in your suit.
 
The sequence 1 2
                   2 3 is non forcing
 
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.
 
The answers to the 2 checkback stayman : (After opener bids 1NT and responder 2 )
2 : minimum without 3 cards in the major
2 : 3 cards in the major, maximum if partenair bids 1 , else minimum
2 : 3 cards in the major, minimum if partenair bids 1 , else maximum
2SA : maximum without 3 cards in the major
 
After 1NT opening, if the partner bids 2 , the following is :
If opener bids 2 : 2 and 2 are invitationnal with 5 cards, 3 and 3 are forcing with 5 cards and 4 cards in the other major.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2NT : 3 and 3 are invitationnal, 4 and 4 are to play, 4 and 4 are double transfert, 3 and 3 are showing slam try in and

PREEMPTIVE BIDS
3NT : Gambling, 7-card solid minor suit with no external tenace
3 , 3 , 3 , 3 : Standard Preemptive Bid - good 7-card suit with no opening value

SPECIAL DOUBLES
Negative Double on any opponents' openining except 1NT
Take out Double up to 2
1 - 1 - Double : precisely 4 cards in
1 / - 1 - Double : precisely 4 card in

OVERCALLS
Style : natural, limited to 17/18 HCP
At least five cards for a level-1 overcall and six cards for a level-2 overcall
Negative Double with an opening bid value and tolerance in other suits, or at least 18 points, with any distribution.
Jump overcalls : preempts
Overcalls on 1NT : Natural
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.

OPENING LEAD : STYLE
  Opening Lead In the partner's suit
Suit
3rd and 5th
3rd and 5th
NT
4th Best
4th Best
Subsequent leads in NT : Low from an honnor, 4th best attitude
 
Discards are also 3rd / 5th most of the time in a suit you doesn't want.

SLAM BIDS AND CONVENTIONS
4NT Blackwood asking for Aces : 3/0 - 4/1 - 2 then 5NT asking for Kings : 3/0 - 4/1 - 2
Sometimes 1st or 2nd rank tenace

DETAIL OF THE DIFFERENT BIDS
Bids
Description
 Responses
Points
Number of cards
Description
Pass
0-11
****
No points
  
1
12-23
4 or more
Natural
 Natural. 2 , 2 , 2 = strong
1
12-23
4 or more
Natural
 Natural. 2 , 2 , 3 = strong
1
12-23
4 or more
Natural
 Natural. 2 , 3 , 3 = strong
1
12-23
4 or more
Natural
 Natural. 3 , 3 , 3 = strong
1NT
12-14
At least 2 in each suit
No 5-card Major

2 Stayman
2 , 2 , 2 = Weak Natural
3 , 3 , 3 , 3 = Natural and Strong
4 = Average 5/5 Major
2
23
****
  • Game forcing
  • 23 points or more.
  • 9 tricks in major and 16 HCP or more
  • 10 tricks in minor and 16 HCP or more
2 = less than 8 points
2NT = At least 8 points
2
18-22
6
18-22 with 6+
Natural
2
18-22
5
18-22 with 6+ or 21-23 with 5
Natural
2
18-22
5
21-23 with 5 or 18-22 with 6+
 Natural
2NT
20-21
At least 2 in each suit
No five-card major
3 Stayman
3 , 3 , 3 , 4 = Jacoby Transfer
4 = Average 5/5 Major
4 , 4 , 5 , 5 = Natural average hand
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3
6-10
Precisely 7
At least 2 high-cards in the suit
 Natural
3SA
9-12
Precisely
7 or 7
A 7-card minor headed with AKQ
 4 to escape to the partner's minor
5 to bid the game in the partner's minor
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural
4
6-10
At least 7
At least 2 high-cards in the suit
 Natural

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American Standard (SAYC)

SYSTEM SUMMARY : BASIC PRINCIPLES
5-CARD MAJOR - Best Minor
1NT : 15-17 balanced hand with no 5-card major
2 : Game Forcing
2 , 2 , 2 : Weak 2 , good suit exactly 6 cards and 5-11 HCP
 
The software doesn't play those conventions : 2NT showing fit after 1 major, 2 Landy, Truscott, 4th suit forcing, 2 Drury.
 
In response, a jump in a new suit shows a very good suit with 16+HCP, after pass it shows a maximum hand (9-11) with 5 cards in the suit and 4 in the opening suit.
 
After a 1 or 1 response, 3NT by the opener shows 18-19 balanced with 4 cards in the major response.
 
A big jump in a new suit is a splinter : showing shortness and a big fit in your suit.
 
The sequence 1 2
                   2 3 is non forcing
 
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.
 
The answers to the 2 checkback stayman : (After opener bids 1NT and responder 2 )
2 : minimum without 3 cards in the major
2 : 3 cards in the major, maximum if partenair bids 1 , else minimum
2 : 3 cards in the major, minimum if partenair bids 1 , else maximum
2SA : maximum without 3 cards in the major
 
After 1NT opening, if the partner bids 2 , the following is :
If opener bids 2 : 2 and 2 are invitationnal with 5 cards, 3 and 3 are forcing with 5 cards and 4 cards in the other major.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2NT : 3 and 3 are invitationnal, 4 and 4 are to play, 4 and 4 are double transfert, 3 and 3 are showing slam try in and

PREEMPTIVE BIDS
3NT : Gambling, 7-card solid minor suit with no external tenace
3 , 3 , 3 , 3 : Standard Preemptive Bid - good 7-card suit with no opening value

SPECIAL DOUBLES
Negative Double on any opponents' openining except 1NT
Take out Double up to 2
1 - 1 - Double : precisely 4 cards in
1 / - 1 - Double : precisely 4 card in

OVERCALLS
Style : natural, limited to 17/18 HCP
At least five cards for a level-1 overcall and six cards for a level-2 overcall
Negative Double with an opening bid value and tolerance in other suits, or at least 18 points, with any distribution.
Jump overcalls : preempts
Overcalls on 1NT : Natural
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.

OPENING LEAD : STYLE
  Opening Lead In the partner's suit
Suit
3rd and 5th
3rd and 5th
NT
4th Best
4th Best
Subsequent leads in NT : Low from an honnor, 4th best attitude
 
Discards are also 3rd / 5th most of the time in a suit you doesn't want.

SLAM BIDS AND CONVENTIONS
4NT Blackwood asking for Aces : 3/0 - 4/1 - 2 then 5NT asking for Kings : 3/0 - 4/1 - 2
Sometimes 1st or 2nd rank tenace

DETAIL OF THE DIFFERENT BIDS
Bids Description Responses
Points Number of cards Description
Pass 0-11 **** No points  
1 12-23 3 or more Natural Natural. 2 , 2 , 2 = strong
1 12-23 3 or more Natural Natural. 2 , 2 , 3 = strong
1 12-23 5 or more Natural Natural. 2 , 3 , 3 = strong
1 12-23 5 or more Natural Natural. 3 , 3 , 3 = strong
1NT 15-17 At least 2 in each suit No 5-card Major

2 Stayman
2 , 2 , 2 , 3 = Jacoby Transfer
3 , 3 , 3 = Natural and Strong
4 = Average 5/5 Major
2 23 ****
  • Game forcing
  • 23 points or more.
  • 9 tricks in major and 16 HCP or more
  • 10 tricks in minor and 16 HCP or more
2 = No Ace and less than 8 points, maximum 1 king
2 = Ace
2 = Ace
2NT = At least 8 points or 2 kings
3 = Ace
3 = Ace
3NT = 2 Aces
2
5-10
Precisely 6
At least 2 high-cards in the suit
 Natural, 2NT strong relay
2
5-10
Precisely 6
At least 2 high-cards in the suit
 Natural, 2NT strong relay
2
5-10
Precisely 6
At least 2 high-cards in the suit
 Natural, 2NT strong relay
2NT 20-21 At least 2 in each suit No five-card major 3 Stayman
3 , 3 , 3 , 4 = Jacoby Transfer
4 = Average 5/5 Major
4 , 4 , 5 , 5 = Natural average hand
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3SA 9-12 Precisely
7 or 7 		A 7-card minor headed with AKQ 4 to escape to the partner's minor
5 to bid the game in the partner's minor
4 6-10 At least 7 At least 2 high-cards in the suit Natural
4 6-10 At least 7 At least 2 high-cards in the suit Natural
4 6-10 At least 7 At least 2 high-cards in the suit Natural
4 6-10 At least 7 At least 2 high-cards in the suit Natural

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Polish system

SYSTEM SUMMARY : BASIC PRINCIPLES
5-CARD MAJOR - 1 opening short with artificial 1 response.
1NT : 15-17 balanced hand with no 5-card major
2 : Strong artificial
2 : Multi
2 5+ with 5+ minor, 2 : 5+ and 5+ in a minor 6-10 HCP, 2NT : 5+5+ in minors
 
The software doesn't play those conventions : 2NT showing fit after 1 major, 2 Landy, Truscott, 4th suit forcing, 2 Drury.
 
In response, a jump in a new suit shows a very good suit with 16+HCP, after pass it shows a maximum hand (9-11) with 5 cards in the suit and 4 in the opening suit.
 
After a 1 or 1 response, 3NT by the opener shows 18-19 balanced with 4 cards in the major response.
 
A big jump in a new suit is a splinter : showing shortness and a big fit in your suit.
 
The sequence 1 2
                   2 3 is non forcing
 
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.
 
The answers to the 2 checkback stayman : (After opener bids 1NT and responder 2 )
2 : minimum without 3 cards in the major
2 : 3 cards in the major, maximum if partenair bids 1 , else minimum
2 : 3 cards in the major, minimum if partenair bids 1 , else maximum
2SA : maximum without 3 cards in the major
 
After 1NT opening, if the partner bids 2 , the following is :
If opener bids 2 : 2 and 2 are invitationnal with 5 cards, 3 and 3 are forcing with 5 cards and 4 cards in the other major.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2 : 3 is invitationnal, 3 is slam try with fit.
If opener bids 2NT : 3 and 3 are invitationnal, 4 and 4 are to play, 4 and 4 are double transfert, 3 and 3 are showing slam try in and

PREEMPTIVE BIDS
2NT : 5 and 5 weak
3NT : Gambling, 7-card solid minor suit with no external tenace
3 , 3 , 3 , 3 : Standard Preemptive Bid - good 7-card suit with no opening value, 4 /4 : 7+ solid /

SPECIAL DOUBLES
Negative Double on any opponents' openining except 1NT
Take out Double up to 2
1 - 1 - Double : precisely 4 cards in
1 / - 1 - Double : precisely 4 card in

OVERCALLS
Style : natural, limited to 17/18 HCP
At least five cards for a level-1 overcall and six cards for a level-2 overcall
Negative Double with an opening bid value and tolerance in other suits, or at least 18 points, with any distribution.
Jump overcalls : preempts
Overcalls on 1NT : Natural
Michael's cue -bid : the cue-bid shows the 2 highest suits and 2NT shows the 2 lowest suits.

OPENING LEAD : STYLE
  Opening Lead In the partner's suit
Suit
3rd and 5th
3rd and 5th
NT
4th Best
4th Best
Subsequent leads in NT : Low from an honnor, 4th best attitude
 
Discards are also 3rd / 5th most of the time in a suit you doesn't want.

SLAM BIDS AND CONVENTIONS
4NT Blackwood asking for Aces : 3/0 - 4/1 - 2 then 5NT asking for Kings : 3/0 - 4/1 - 2
Sometimes 1st or 2nd rank tenace

DETAIL OF THE DIFFERENT BIDS
Bids Description Responses
Points Number of cards Description
Pass 0-11 **** No points  
1 12-23 2 or more Natural or 12-14 Bal or 18-22 bal Natural. 2 , 2 , 2 = strong
1 12-23 5 or more Natural 5cards except 4441 Natural. 2 , 2 , 3 = strong
1 12-23 5 or more Natural Natural. 2 , 3 , 3 = strong
1 12-23 5 or more Natural Natural. 3 , 3 , 3 = strong
1NT 15-17 At least 2 in each suit No 5-card Major

2 Stayman
2 , 2 , 2 , 3 = Jacoby Transfer
3 , 3 , 3 = Natural and Strong
4 = Average 5/5 Major
2 23 ****
  • Game forcing
  • 23 points or more.
  • 9 tricks in major and 16 HCP or more
  • 10 tricks in minor and 16 HCP or more
2 = No Ace and less than 8 points, maximum 1 king
2 = Ace
2 = Ace
2NT = At least 8 points or 2 kings
3 = Ace
3 = Ace
3NT = 2 Aces
2 6-10 6 cards
  • Multi :
  • weak in
  • weak in
Natural
2 6-10 5/5 5 and another 5 cards suit Natural, 2NT relay
2 6-10 5/5 5 and 5 cards in a minor Natural, 2NT relay
2NT 6-10 5/5 Natural weak with 5 and 5 3 , 3 = Weak
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3 6-10 Precisely 7 At least 2 high-cards in the suit Natural
3SA 9-12 Precisely
7 or 7 		A 7-card minor headed with AKQ 4 to escape to the partner's minor
5 to bid the game in the partner's minor
4 6-10 At least 7 Maximum one loser in Natural
4 6-10 At least 7 Maximum one loser in Natural
4 6-10 At least 7 At least 2 high-cards in the suit Natural
4 6-10 At least 7 At least 2 high-cards in the suit Natural



Specificity of the WBridge5 engine

WBridge5 engine
WBridge5 plays only 5 cards Major system, with some conventions, identifiable from "my bidding system"..

Imposed conventions (in pale blue in the Funbridge software, ticked) :

- 1 NT with possibility to have a 5 cards Major
- Texas of Major
- Negative Double
- Lebensohl
- signals even odd at the color (until the 8th trick)

The Funbridge player chooses for Noth South :

Meaning of some bids

- minor opening : best minor or D fourth
- opening value from 1 NT : 12 - 14 HCP, 15 - 17 HCP, 16 - 18 HCP
- meanings of 2NT or 3 NT in answer to major openings (never fitted, or if fitted : 2NT 11-12 or 12-15, 3NT fitting : 12 - 15 ou 16 - 18)

Optional conventions

- opening lead 4th best at NT (if you don't play this convention, the opening lead is even -odd)
- Texas on 6th minor
- Splinters
- Roudi
- Blackwood 5 Aces (only if you found a trump, else, BW 0, 1/4, 2, 3)
- Bicolors in overcall (no special bids, michael's cue-bid, 2NT = the 2 cheapest)
- Landy in overcall on 1NT
- 2D multi in overcall on 1NT
- Bicolor 4C 4D in overcall on 2 weak majors or in overcall after 1NT or 2 NT
- Rodrigue
- Truscott

Conventions of East West

The East West partners play the same conventions for everybody (no difference noticeable between choices done by the player for North South could be underlined)

You can display theses East West conventions by clicking on "Default values".


East West default System
5 cards Major, best minor
2C very indeterminated, 2D game forcing, 2 weak major
1NT=15-17 (possible with a 5 cards Major)
Texas major and minor
Splinter
Negative Double
Lebensohl
Roudi
Normal Blackwood (Answers 0,1,2,3,4)
Fourth best at NT

If you begin or you don't want to get a headache, you can choose default North South conventions too.


Informations about some developments :

In all is following :
1m = bidding at level 1 in a minor color
1M = bidding at level 1 in a major color
1x = bidding at level 1 in any color


Answer to 2C Albarran (Aces)
2D : less than 8HCP
2C : Ace of Hearts
2S : Ace of Spades
2NT : 8HCP and more
3C : Ace of Clubs
3D : Ace of Diamonds
3NT : 2 Aces
4NT : 3 Aces


Answer to 2C very indeterminated
2D : less than 8HCP
2C, 2S : at least 8HCP and 5 cards in the color.
3C, 3D : at least a nice color of 6 cards and 10 Distribution points
2NT : at least 10HCP.


Answer to 2D Game Forcing
2C : no Ace and less than 8HCP
2S : any Ace
2NT : no Ace and at least 8HCP or 2 Kings
3C, 3D, 3C, 3S : no Ace and 6 cards in the color, one of which is King Queen or King Jack 10.
3NT : 2Aces
4NT : 3Aces (rare)


Stayman at 2C
2D : without major of 4 cards.
2C : with 4 hearts.
2S : with 4 spades.
2NT : with 4 hearts and 4 spades.
3C : at least with 5 hearts.
3D : at least with 5 spades.
3C : max with 5 hearts.
3S : max with 5 spades .


Normal Blackwood
5C : 0 Ace
5D : 1 Ace
5C : 2 Aces
5S : 3 Aces
5NT: 4 Aces


Blackwood 5 keys
5C : 0 or 3 keys
5D : 1 or 4 keys
5C : 2 keys
5S : 2 keys + Queen of trump


After the answer to 5C, 5D is a query to the Queen of trump (except if the fit is at diamond !)
The replyer should announce 5S with the Queen and 5C without.


Lebensohl
See lower


Roudi
After the auction 1x 1M 1NT, the bid of 2C is conventional and the opener should answer:
2D : minimum without 3 cards in the major of the replyer
2C : minimum with 3 cards in the major of the replyer
2S : maximum with 3 cards in the major of the replyer
2NT : maximum without 3 cards in the major of the replyer
3C, 3D : maximum with 3 cards in the major of the replyer and 5 cards in the color of the opening

This convention is applicable for theses cases too:
1C 1D 1NT
1x 2D 2NT
1C 2S 2NT
1m 1M 2NT
1x 2M 2NT


Rodrigue
After an overcall at 1S on a minor opening, the support at 2m means 5C with an insufficient hand to say 2C directly.


Namyats
Opening of 4C matches with a 4C opening with 2 Aces.
Opening of 4D matches with a 4S opening with 2 Aces
As a result, pre-emptive bids at 4C and 4D are bidded at level 3.




Conventions which are NOT in the East West system
No 2NT nor 3NT fitting
No bicolor in overcall
No Landy in overcall on 1NT
No Nahmiats
No 2D multi in overcall on 1NT
No Rodrigue
No Truscott
No Blackwood 5 keys


Auctions to remind
* North 1m – South 1M – North 3NT
It's natural on the engine 2 (whereas it's fitting in major on the engine 1)

* North 2D (fm) – South 2C/2S – North 3NT
Indicate a major bicolor 5-5 in North (like with the engine 1)

* South 1NT – North 4D
Indicate a major bicolor 5-5 (like with the engine 1)
(2NT – 4D : the same)

* South 1NT – Ouest 2x – North 2NT
Lebensohl



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