1 opening, 1 GFR

Meaning of the opening: 11-16 HCP, 2+ .
Possible shapes:

All GF hands start with 1 response. Further bidding based on usual schemes of the system, opener can be interrogated.
Because of this, the response is 1 even with 4+ . Other sequences can't include gameforcing hands, thus further bidding is mostly natural, our goal is always clear.

1 - ?
- 1: folytatás 4+ or , less than GF
- 1: folytatás Gameforcing relay. All other bids are weaker.
- 1N:7-10, no 4-card major
- 2m:10-12, 5+ suit, no 4-card major. Opener: 2: 5+, F1, 2M: good hand, lack of stopper; 3M: good hand, SPL; 2N and raise are weak
- 2M:6+ suit, less than game try hand. Opener: S1 big hand with fit, asks for shortness, 3M pre-emptive (4 trumps), 3m NAT, without fit, 4m SPL, 4 trumps, max hand (slam is easily possible!).
- 2N:11-12, no 4-card major, no 5-card minor (4m-333 or 44m-32)
- 3m:6+ suit, weak hand, no 4-card major

On itervention


1 - 1 4+ M, less than GF
?  
- 1: folytatás 3+ (most hands with 3-cards must bid this one; see also: 2, 3, 4)
- 1N:3-4 , 0-2 , not necessarily balanced hand.
With : 2 Checkback-like (2 = 3-cards , 2: 4-cards , weak, above: 4-cards and strong.), 2: weak, 3: game try
With : 2: sign-off (in ), 2: 6+ (very good 5), game try, 2N: game try 4-5 , 3m: game try 5m-4+ , 3: good 6+ suit
- 2:54+ minors (no 3-card ). Now 2 (5+) and 2 (6+) game try! (with weak hand 2M must be bid immediately)
- 2:6+ suit, weak (denies 3-card ). Now 2 (5+) and 2 (6+) are game try! (with weak hand 2M must be bid immediately)
- 2M:6-4M, strong (2 could be bid with very good 5-4 too)
- 2N:6-3, strong
- 3:strong 5-5+, denies 3-card
- 3:6+ , strong, denies 3-card major
- 3:strong 4-4-4-1 or intermediate 4-4-5-0
- 4:very strong 4-4-5-0. Now 4M sign-off, 4 puppet, Kickback RKC follows.

After intervention


1 - 1
1 - ? 3+ , may even have 3-4.
- 1N:4-5 , below inv hand; opener corrects with 4-card (he might correct with 3 if he feels like).
- 2: 5-4+ , sign-off, or 4+ , game try (but not with 4-5x)
Opener bids 2 with 4-card (CSLT on this), otherwise 2. folytatás (with a very strong hand you may bid 3, which is 3-4-5-1).
- 2:folytatás 4+ , game try (with 4-4 bid 2 instead, this one shows longer or perhaps 5-5 majors)
- 2:4, 4+ , slightly below game try (8-10). Opener chooses, with a giant hand he may raise or jump.
- 2:4+ , below imvitational, but not hopeless hand (~ 8-10)
- 2N:4-card , BAL, game try
- 3m:5+ suit, exactly 4-card , game try
- 3:6-4, game try
- 3:5+ , game try

1 - 1
1 - 2 responder: sign-off or game try with 4+ (but can't be 4-5x with that 3m or 2)
2 - ? opener: 3-4 , 0-3
- pass: weak hand with 4 and 5+
all other bids show exactly inviting hands and can be passed:
- 2: 5+ , (can't be 5-5, but 5-4 or 5-4m can)
- 2: 4-4
- 2N: 1-4-4-4 (or 0-4-(54))
- 3m: 5-5m
- 3: good 6+ suit

1 - 1
1 - 2 Opener: 3-4 , responder: 4+ , game try
?  
- 2: only 3-card a , can be strong
- 2: 4-card , very weak hand ("you can't have a hand that makes game")
- 2N: intermediate hand, intro of a Long Suit Trial (4+ suit)
- 3: Short Suit Trial (SST): singleton in the suit, not accepting hand
- 3: 4-card , intermediate, balanced hand
- 4: giant hand 4-card with , SPL
- 4: accepting hand, 4-card

1 - 1 GF relay
?  
- 1N: folytatás4333, 4432, 5332, and NT-ish 5m422 shapes.
- 2: 5-card , or 3-suiter hand with short . On 2 relay:
- 2: 5-4M. Now both 2 and 2N are relay, on these S12 = 4-card , S34 = 4-card , singletons are first.
- 2: 3-suiter hand with short . Now: 2N: relay (3m: 5m-440, 3 = 4441), any suit bid: OCYS
- 2N...3N: 5+ and 4+ following the full scheme (5-5, 5-4).
- 2: 4-card , specifically + or 3-suiter hand with 4-card . On a relay:
- 2: 3-suiter. Same continuation as 3-suiter hands afterfolytatás 1-1M
- 2N...3N: + folowing the full scheme
- 2: 4-card , specifically + . On 2 relay according to the full, on 2N relay acc. to the compact two-suiter scheme.
- 2: One-suiter . The usual method on a relay.
- 2N...3N: 5+ and 4+ following the full scheme (6-4, 5-4).

1 - 1 responder: any GF
1N - ? Opener: 4333, 4432, 5332, (5m422)

Your possibilities as responder:

- 2: folytatás relay, as on mini NT. You should bid this if you want to learn opener's shape (mainly slam going hands without a sortness) and lack of better with a 4-card major. Later you may deviate with some hands containing shortness, but in a different way as after mini NT. This is due to the fact that you can hardly have 5-card major with a shortness after the relay, because you can start with 2M with those hands. The differences:
  • on ...-2 (44+ minors): 3: 4+ , short //
  • on ...-2N (5-332): 3: sets as trump, short //
  • on ...-3 (4m333): 3M: singleton
  • on ...-2M-1 (4-card M): 2N = 5m-4oM (S1 asks the 5-card suit and the shortness), 3m = 6m-4oM (S1 asks the short suit).
- 2: 6+ or 54+. 2: 2 = 55+ minors, 2N...3: as immediate bids with
- 2: NAT 5+ (other major is not 4-carder). Opener shows his support: S1 = 2, S2 = 3, S3 = 4.
  • plain suit bid: NAT, 4+ suit on S1, SPL on L23
  • jump shift on S1: 6+ M, SPL
  • 3N: can be passed, choice of games (on S3 too?)
  • 3M: 6+M, has a void, bids it on S1. This is an ORKC
- 2N: 6+ , has a singleton (bids it on 3)
- 3...3: 2-suiter according to the compact 2-suiter scheme (3 is slam try)

1 - 1 - (X)
?  
Usual double of the GF relay thing is not applied here, because it would wrong-side NT, but:
- pass: balanced hand, without a spade stopper. XX: would like to play, 1N: relay, usual scheme, (2 = 5-332), It does not matter whether Responder have a stopper or not, either he can play NT or nobody, he will know. His later spade bids look for a half-stopper. 2x natural, has a singleton, like 2M without the intervention.
- 1N: balanced hand with spade stopper, scheme is on
- XX: unbalanced hand spade stoppersal. Erre 1N relay, él a scheme
- 2...3N: unbalanced hand without a spade stopper, as without the double