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INTERFERENCE FROM OPPONENT part
1 After we open and opponent interfere in level 1 we need agreements with partner from what is now the meaning of Responder's bids. Thus here we propose some rules to be follow by Responder: RULE#1: After an open in a minor suit (1♦), independent of any interference at level 1 or 2, the asking for aces (not for keycards) will be made using the Gerber Conventions bidding 4♣ and the responses are: 4♦=zero/4 aces 4♥=1 ace, 4♠=2 aces and 4nt=3 aces. After the Opener response of his aces any bid by Responder is conclusive and so Opener must pass. In case of interference after 4♣ then we use DOPI (Double zero, Pass one, next suit = 2 aces and next+1 suit = 3 aces). Examples: Opener Overcaller Responder (having strong hand) 1♦ 1♠ 4♣ <= Gerber – ex ♠AQ10 ♥x ♦KQ87xx ♣K98 1♣ 1♦ 4♣ <= Gerber - ex ♠KQJ ♥Kx ♦x ♣AQ98542 1♦ double 4♣ <= Gerber - ex ♠x ♥x ♦KQJ743 ♣AQJ82 1♣ double 4♣ <= Gerber - ex ♠AQ ♥x ♦KQ108 ♣KQJ987 RULE#2: After an open in a minor, with or without interference at level 1 or 2, the response 4♦ is a transfer to 4♥ showing 7/8 cards and up to 9 hcp without 2 aces and in similar way the response 4♥ is a transfer to 4♠. Examples: Opener Overcaller Responder 1♦ 1♠ 4♦ <= transfer to 4♥ => ♠x ♥KQJ98732 ♦J87 ♣x 1♣ 1♦ 4♥ <= transfer to 4♠ => ♠x ♥xx ♦Q87 ♣x 1♦ double 4♦ <= transfer to 4♥ => ♠x ♥AK987532 ♦Jx ♣Jx 1♣ double 4♥ <= transfer to 4♠ => ♠AKJ108xx ♥x ♦xx ♣xxx Rule#03 - After we open in a suit at level 1 and opponent bid a takeout double our priority is to inform Opener about our strength with 10+ or less than 10 hcp and Responder do that bidding redouble or bidding anything else: Opener Opponent Responder 1♣ double redouble <= 10+ hcp 1♦ double redouble <= 10+ hcp 1♥ double redouble <= 10+ hcp 1♠ double redouble <= 10+ hcp 1♣ double any bid up the line <= less than 10 hcp 1♦ double any bid up the line <= less than 10 hcp 1♥ double any bid up the line <= less than 10 hcp 1♠ double any bid up the line <= less than 10 hcp Note1: after redouble all doubles are penalty, but a player should not let partner double at level 1 or level 2 when he is shorter (zero/1 card) in opponent suit principally when the opponent suit is bided by the partner of the doubler (Advancer) because in this case opponents have a 8 cards fit. Note2: of course, there are some situations that Responder even with 10 hcp should not redouble like when he bids game, splinters or shows support (like in Jordan conventions) and a strength not for punish opponents at level 1 or 2 but to play in opener's suit at level 3 or invite Opener to game. Note3: a double, after redouble, should be done when: 1- we have more strength in honors than opponents; 2- simultaneously we don't have support to partner's suit and presume that a misfit may occurs in this board; 3- we have 4+ cards with good honors in the opponent suit. Rule#04 - We don't redouble having balanced hand with 4 cards support in partner's major suit or 5 cards support in partner's minor suit and we bid 2nt showing 10-11 hcp (Jordan convention): Opener Opponent Responder 1♣ double 2NT <= 10-11 hcp with 5♣+ cards 1♦ double 2NT <= 10-11 hcp with 5♦+ cards 1♥ double 2NT <= 10-11 hcp with 4♥ cards balanced hand 1♠ double 2NT <= 10-11 hcp with 4♠ cards balanced hand 1♥ double 4♥ <= undefined with 5♥+ cards 1♠ double 4♠ <= undefined with 5♠+ cards 1♥ double 3♠ <= splinter 10-11 hcp shorter in ♠ with 4♥+ 1♥ double 4♣ <= splinter 10-11 hcp shorter in ♣ with 4♥+ 1♥ double 4♦ <= splinter 10-11 hcp shorter in ♦ with 4♥+ 1♠ double 4♣ <= splinter 10-11 hcp shorter in ♣ with 4♠+ 1♠ double 4♦ <= splinter 10-11 hcp shorter in ♦ with 4♠+ 1♠ double 4♥ <= splinter 10-11 hcp shorter in ♥ with 4♠+ After Jordan (10-11 hcp) if Opener rebids his suit this is sign-off. Rule#05 - After an opening in a minor suit and a takeout double by opponent Responder bidding a suit shows 5+ cards and less than 10 hcp - not forcing, so Opener can pass with 2 cards: Opener Opponent Responder 1♣ double 1♦ <= 4♦+ and <10 hcp ♠108xx ♥J976 ♦KQ98 ♣x 1♣ double 1♥ <= 5♥+ and <10 hcp ♠Q8x ♥KJ974 ♦9xx ♣xx 1♣ double 1♠ <= 5♠+ and <10 hcp ♠QJ108x ♥7 ♦Q982 ♣10xx 1♦ double 1♥ <= 5♥+ and <10 hcp ♠Q7x ♥QJ972 ♦9 ♣J10xx 1♦ double 1♠ <= 5♠+ and <10 hcp ♠K108xxx ♥97 ♦98 ♣Jxx 1♦ double 2♣ <= 6♣+ and <10 hcp ♠Kxx ♥972 ♦9 ♣K98xxx Rule#06 - After an opening in a minor suit and a takeout double by opponent Responder bids 1nt with 8-9 hcp and 4333 or 4432 distribution having stoppers in both majors denying any 5 cards suit: Opener Opponent Responder 1♣ double 1NT <= 8-9 hcp ♠K10x ♥QJ97 ♦QJ87 ♣10xx 1♦ double 1NT <= 8-9 hcp ♠Q108x ♥QJ97 ♦98 ♣KJx Rule#07 - After an opening in a major suit and a takeout double when Responder strength is 6-9 hcp Responder makes a transfer to show his 6+ card suit bidding 1nt/2♣/2♦: Opener Opponent Responder 1♠ double 1NT (trf) <= shows 6♣+ cards and 6-9 hcp 1♠ double 2♣ (trf) <= shows 6♦+ cards and 6-9 hcp 1♠ double 2♦ (trf) <= shows 6♥+ cards and 6-9 hcp 1♠ double 2♥ (trf) <= shows 3♠ cards and 8-9 hcp 1♠ double 2♠ <= shows 3♠ cards and 6-7 hcp 1♠ double 3♠ nVul <= shows 4♠ cards and 3-7 hcp 1♠ double 3♠ Vul <= shows 4♠ cards and 8-9 hcp 1♥ double 1♠ <= shows 5♠+ cards and 6-9 hcp 1♥ double 1NT (trf) <= shows 6♣+ cards and 6-9 hcp 1♥ double 2♣ (trf) <= shows 6♦+ cards and 6-9 hcp 1♥ double 2♦ (trf) <= shows 3♥ cards and 8-9 hcp 1♥ double 2♥ <= shows 3♥ cards and 6-7 hcp 1♥ double 3♥ nVul <= shows 4♥ cards and 3-7 hcp 1♥ double 3♥ Vul <= shows 4♥ cards and 8-9 hcp Note4: when Opener make a transfer after opponent double and Responder bids a delayed support in Opener major suit this is a constructive bid with 8-9 hcp and showing A or K in his lateral suit with 6 cards: Opener Opponent Responder Opponent2 1♠ double 1NT (trf) pass 2♣ pass 2♠ <= shows 8-9 hcp and 3♠-6♣ cards Opener Opponent Responder Opponent2 1♥ double 2♣ (trf) pass 2♦ pass 2♥ <= shows 8-9 hcp and 3♥-6♦ cards Resume1 - After an opening at level 1 in suit if opponent makes a takeout double the following bids are proposed for Responder: Opener Opponent Responder 1♣ double pass <= waiting - less than 10 hcp 1♣ double redouble <= 10+ hcp - denies 5♣+ 1♣ double 1♦ <= 4♦ good cards or 5♦+ 6-9 hcp 1♣ double 1♥ <= 5♥+ with 1+ top honors and 6-9 hcp 1♣ double 1♠ <= 5♠+ with 1+ top honors and 6-9 hcp 1♣ double 1NT <= 8-9 hcp in 4333 or 4432 1♣ double 2♣ <= 4♣+ and 6-9 hcp 1♣ double 2♦ <= weak 6♦+ 1+ top honors =< 6 hcp 1♣ double 2♥ <= weak 6♥+ 1+ top honors =< 6 hcp 1♣ double 2♠ <= weak 6♠+ 1+ top honors =< 6 hcp 1♣ double 2NT <= 10-11 hcp with 5♣+ cards Jordan 1♣ double 3♣ <= preemptive - 5♣+ cards - 6-9 hcp 1♣ double 3♦ <= splinter 5♣+ cards - 10-12 hcp 1♣ double 3♥ <= splinter 5♣+ cards - 10-12 hcp 1♣ double 3♠ <= splinter 5♣+ cards - 10-12 hcp 1♣ double 3NT <= to play - 12-15 hcp 1♣ double 4♣ <= Gerber - asking for aces 1♣ double 4♦ <= transfer to 4♥ - 7♥+ cards 1♣ double 4♥ <= transfer to 4♠ - 7♠+ cards 1♣ double 5♣ <= to play Opener Opponent Responder 1♦ double pass <= waiting - less than 10 hcp 1♦ double redouble <= 10+ hcp - denies 5♦+ 1♦ double 1♥ <= 5♥+ with 1+ top honors and 6-9 hcp 1♦ double 1♠ <= 5♠+ with 1+ top honors and 6-9 hcp 1♦ double 1NT <= 8-9 hcp in 4333 or 4432 1♦ double 2♣ <= 6♣+ and 6-9 hcp 1♦ double 2♦ <= 4♦+ 6-9 hcp 1♦ double 2♥ <= weak 6♥+ 1+ top honors =< 6 hcp 1♦ double 2♠ <= weak 6♠+ 1+ top honors =< 6 hcp 1♦ double 2NT <= 10-11 hcp with 5♦+ cards 1♦ double 3♣ <= weak 6♣+ 1+ top honor =< 6hcp 1♦ double 3♦ <= preemptive 5♦+ cards - 6-9 hcp 1♦ double 3♥ <= splinter 5♣+ cards - 10-12 hcp 1♦ double 3♠ <= splinter 5♣+ cards - 10-12 hcp 1♦ double 3NT <= to play - 12-15 hcp 1♦ double 4♣ <= Gerber - asking for aces 1♦ double 4♦ <= transfer to 4♥ - 7♥+ cards 1♦ double 4♥ <= transfer to 4♠ - 7♠+ cards 1♦ double 5♦ <= to play Opener Opponent Responder 1♥ double pass <= waiting - less than 10 hcp 1♥ double redouble <= 10+ hcp - denies 4♥+ cards 1♥ double 1♠ <= 5♠+ with 1+ top honors and 6-9 hcp 1♥ double 1NT <= transfer to 2♣ - 6♣+ cards 6-9 hcp 1♥ double 2♣ <= transfer to 2♦ - 6♦+ cards 6-9 hcp 1♥ double 2♦ <= 3♥ cards - 8-9 hcp 1♥ double 2♥ <= 3♥ cards - 6-7 hcp 1♥ double 2♠ <= weak 6♠+ 1+ top honors <= 6 hcp 1♥ double 2NT <= 10-11 hcp with 4♥ cards balanced 1♥ double 3♣ <= weak 6♣+ 1+ top honors <= 6 hcp 1♥ double 3♦ <= weak 6♦+ 1+ top honors <= 6 hcp 1♥ double 3♥ <= 4♥ cards - 6-9 hcp (Vul ?) 1♥ double 3♠ <= splinter 4♥+ cards and 9-11 hcp 1♥ double 3NT <= to play - 12-15 hcp 1♥ double 4♣ <= splinter 4♥+ cards and 9-11 hcp 1♥ double 4♦ <= splinter 4♥+ cards and 9-11 hcp 1♥ double 4♥ <= to play - 5♥+ cards Opener Opponent Responder 1♠ double pass <= waiting - less than 10 hcp 1♠ double redouble <= 10+ hcp - denies 4♠+ cards 1♠ double 1NT <= transfer to 2♣ - 6♣+ cards 6-9 hcp 1♠ double 2♣ <= transfer to 2♦ - 6♦+ cards 6-9 hcp 1♠ double 2♦ <= transfer to 2♥ - 6♥+ cards 6-9 hcp 1♠ double 2♥ <= 3♠ cards - 8-9 hcp 1♠ double 2♠ <= 3♠ cards - 6-7 hcp 1♠ double 2NT <= 10-11 hcp with 4♠ cards balanced 1♠ double 3♣ <= weak 6♣+ 1+ top honors =< 6 hcp 1♠ double 3♦ <= weak 6♦+ 1+ top honors =< 6 hcp 1♠ double 3♥ <= weak 6♥+ 1+ top honors =< 6 hcp 1♠ double 3♠ <= 4♠ cards and 6-9 hcp (Vul ?) 1♠ double 3NT <= to play - 12-15 hcp 1♠ double 4♣ <= splinter 4♠+ cards and 9-11 hcp 1♠ double 4♦ <= splinter 4♠+ cards and 9-11 hcp 1♠ double 4♥ <= splinter 4♠+ cards and 9-11 hcp 1♠ double 4♠ <= to play - 5♠+ cards Resume2 – After an opening in 1♣ if opponent interfere at level 1 the propose Responder`s bids are: Responder Opponent Opener Opponent ............................... 1♣ 1♦ ? pass <= waiting - may have ♦ suit or less than 6 hcp double <= shows 6+ hcp and both major 4♥5♠ 1♥ <= shows 6+ hcp and 4♥+ cards 1♠ <= shows 6+ hcp and 4♠+ cards 1NT <= 8-10 hcp and 1,5 stopper in ♦ denies majors 2♣ <= 4♣+ cards and 6-9 hcp - good clubs support 2♦ <= invitation 5♣+ and 11+ hcp denies majors 2♥ <= weak less than 6 hcp and 6♥+ with 1 top honor A/K 2♠ <= weak less than 6 hcp and 6♠+ with 1 top honor A/K 2NT <= invitation 11 hcp with 1,5 stopper no majors 3♣ <= preemptive 5♣+ and 6-9 hcp - no majors 3♦ <= asking for stopper in ♦ Opener bid 3nt or 4♣/5♣ 3♥ <= splinter 5♣+ cards and 11-12 hcp singleton ♥ 3♠ <= splinter 5♣+ cards and 11-12 hcp singleton ♠ 3NT <= to play - 12-15 hcp and 1,5 stopper in ♦ 4♣ <= Gerber - ask for aces - strong hand GF 4♦ <= transfer to 4♥ => ♠x ♥KQJ98732 ♦J87 ♣x 4♥ <= transfer to 4♠ => ♠AQJ987xx ♥J2 ♦7 ♣xx 5♣ <= to play => ♠Kx ♥32 ♦7 ♣KQ876xxx Responder Opponent Opener Opponent ............................... 1♣ 1♥ ? pass <= waiting - may have ♥ suit or less than 6 hcp double <= shows 4♠ and 6+ hcp 1♠ <= shows 5♠+ cards and 6+ hcp 1NT <= 8-10 hcp and 1,5 stopper in ♥ denies 4 spades 2♣ <= 4♣+ cards and 6-9 hcp deny Spades 2♦ <= 5♦+ cards and 10+ hcp - one-round force 2♥ <= invitation 11+ hcp and 5♣+ denies 4 spades 2♠ <= weak less than 6 hcp and 6♠+ with 1 top honor 2NT <= invitation 10-12 hcp with 1,5 stopper no majors 3♣ <= preemptive 5♣+ and 6-9 hcp - no majors 3♦ <= splinter 5♣+ cards and 10-11 hcp singleton ♦ 3♥ <= asking for stopper in ♥ for bid 3nt or 4♣/5♣ 3♠ <= splinter 5♣+ cards and 11+ hcp singleton ♠ 3NT <= to play - 12-15 hcp and 1,5 stopper in ♦ 4♣ <= Gerber - ask for aces - strong hand GF 4♥ <= transfer to 4♠ => ♠AKJ9xxxx ♥J2 ♦7 ♣xx 5♣ <= to play Responder Opponent Opener Opponent ............................... 1♣ 1♠ ? pass <= waiting - may have ♠ suit or less than 6 hcp double <= shows 4♥+ cards and 6+ hcp 1NT <= 8-10 hcp and 1,5 stopper in ♥ denies 4 hearts 2♣ <= 4♣+ cards and 6-9 hcp denies 4 hearts 2♦ <= 5♦+ cards and 10+ hcp - on-round force 2♥ <= 5♥+ cards and 10+ hcp - one-round force 2♠ <= invitation 5♣+ and 11+ hcp - one-round force 2NT <= invitation 11-12 hcp with 1,5 stopper no hearts 3♣ <= preemptive 5♣+ and 6-9 hcp - no majors 3♦ <= splinter 5♣+ cards and 11+ hcp singleton ♦ 3♥ <= splinter 5♣+ cards and 11+ hcp singleton ♥ 3♠ <= asking for stopper in ♠ bidding 3nt or 4♣/5♣ 3NT <= to play - 12-15 hcp and 1,5 stopper in ♠ 4♣ <= Gerber asking aces - strong hand GF 4♦ <= transfer to 4♥ => ♠x ♥KQJ98732 ♦J87 ♣x 5♣ <= to play Resume3 - After an opening in 1♦ if opponent interfere bidding a major at level 1 the Responder`s bids proposed are: Responder Opponent Opener Opponent ............................... 1♦ 1♥ ? pass <= waiting - may have ♥ suit or less than 6 hcp double <= shows 4♠ and 6+ hcp 1♠ <= shows 5♠+ cards and 6+ hcp 1NT <= 8-10 hcp and 1,5 stopper in ♥ denies 4 spades 2♣ <= 5♣+ cards and 10+ hcp - one-round force 2♦ <= 4♦+ cards and 6-9 hcp 2♥ <= invitation 11-12 hcp and 4♦+ denies 4 spades 2♠ <= weak less than 6 hcp and 6♠+ with 1 top honor A/K 2NT <= invitation 11-12 hcp with 1,5 stopper no majors 3♣ <= preemptive 6♣+ cards and 6-9 hcp - no majors 3♦ <= preemptive 5♦+ cards and 6-9 hcp 3♥ <= ask for stopper in ♥ bidding 3nt or 4♦ or 5♦ 3♠ <= splinter 5♦+ cards and 10-11 hcp singleton ♠ 3NT <= to play - 12-15 hcp and 1,5 stopper in ♥ 4♣ <= Gerber asking aces - strong hand GF 4♥ <= transfer to 4♠ => ♠KQJ987xx ♥2 ♦J7 ♣xx 5♦ <= to play Responder Opponent Opener Opponent ............................... 1♦ 1♠ ? pass <= waiting - may have ♠ suit or less than 6 hcp double <= shows 4♥+ cards and 6+ hcp 1nt <= 8-10 hcp and 1,5 stopper in ♥ denies hearts 2♣ <= 5♣+ cards and 10+ hcp - one-round force 2♦ <= 4♦ cards and 6-9 hcp - denies hearts 2♥ <= 5♥+ cards and 10+ hcp - one-round force 2♠ <= invitation 5♣+ and 11+ hcp - one-round force 2nt <= invitation 10-12 hcp with 1,5 stopper no hearts 3♣ <= preemptive 5♣+ and 6-9 hcp - no majors 3♦ <= splinter 5♣+ cards and 10-11 hcp singleton ♦ 3♥ <= splinter 5♣+ cards and 10-11 hcp singleton ♥ 3♠ <= asking for stopper in ♠ bidding 3nt else rebid ♣ 3nt <= to play - 12-15 hcp and 1,5 stopper in ♠ 4♣ <= Gerber asking aces 4♥=1/4♠=2/4nt=3 4♦ <= transfer to 4♥ => ♠x ♥AKJ98732 ♦10 ♣10xx 5♣ <= to play Resume4 - After an opening in 1♥ if opponent interfere with 1♠ the Responder`s bids proposed are: Responder Opponent Opener Opponent ............................... 1♥ 1♠ ? pass <= waiting - may have long spades double <= 6+ hcp and both minors 1NT <= 8-10 hcp and 1,5 stopper in ♥ denies 4 spades 2♣ <= 5♣+ cards and 10+ hcp - one-round force 2♦ <= 5♦+ cards and 10+ hcp - one-round force 2♥ <= 3♥ cards support and 6-9 hcp 2♠ <= invitation 10-11 hcp and 3♥ cards 2NT <= invitation 11-12 hcp with 1,5 stopper in Spades 3♣ <= preemptive 6♣+ cards and 6-9 hcp 3♦ <= preemptive 6♦+ cards and 6-9 hcp 3♥ <= 4♥ cards and 6-9 hcp (Vul ?) 3♠ <= splinter 4♥+ and 11+ hcp 3NT <= to play - 12-15 hcp and 1,5 stopper in ♥ 4♣ <= splinter 4♥+ and 11+ hcp 4♦ <= splinter 4♥+ and 11+ hcp 4♥ <= to play 4♥+ and 2-10 hcp 4NT <= RKB1430 for ♥ Bottom Line: Even after an opponent takeout double or overcall partnership may create reliable information to have better decision in the board. |