DEVELOPPEMENTS OF 1♦ OPENINGS OVER OPPONENTS INTERFERENCE

1♦ - (DBL) BY OPPONENTS

    RDBL 9+HCP 
    SYSTEM ON


1♦ - (1♥) BY OPPONENTS

    PASS♠PASS OR TRAP PASS
    DBL♠ 5-8 HCP 5+♠ OR 8+HCP 4♠
    1♠   8+HCP NO 4 CARD MAJORS
    1NT♠ 8-11 HCP NO 4 CARD MAJORS W HEART STOPPER
    2♣   5+HCP 3+♦
    2♦   9+HCP 5+♣ (TRANSFER CUE-BID)
    2♥   9+HCP 5+♠
    2♠   8-11 HCP 5+♣ 4♠
    2NT♠ 7-10 HCP 5+♣ 5+♠ (UNBID 2 SUITS)
    3♣   8-11 HCP 5+♣ 4♦
    3♦   8-11 HCP 5+♦ 4♠

1♦ - (1♠) BY OPPONENTS

    PASS♠PASS OR TRAP PASS
    DBL♠ 5-8 HCP 5+♥ OR 8+HCP 4♥
    1NT♠ 8-11 HCP NO 4 CARD MAJORS W SPADE STOPPER
    2♣   5+HCP 3+♦
    2♦   9+HCP 5+♥
    2♥   8-11 HCP 5+♣ 4♥
    2♠   9+HCP BALANCED OR 5+♣
    2NT♠ 7-10 HCP 5+♣ 5+♥ (UNBID 2 SUITS)
    3♣   8-11 HCP 5+♣ 4♦
    3♦   8-11 HCP 5+♦ 4♥
   
1♦ - (1NT) BY OPPONENTS

    PASS♠PASS 
    DBL♠ 9+HCP PENALTY
    2♣   5+♣ 4M
    2♦   MAJORS
    2♥   5+♥ 
    2♠   5+♠
    2NT♠ 2 SUITED
    3♣   6+♣ PREEMPT
    3♦   5+♦ PREEMPT
    3♥   6+♥ PREEMPT
    3♠   6+♠ PREEMPT

1♦ - (2♣) BY OPPONENTS

    PASS♠PASS OR TRAP PASS
    DBL♠ 5-8 HCP 5+♥ OR 8+HCP 4♥
    2♦   5-8 HCP 5+♠ OR 8+HCP 4♠
    2♥   9+HCP 5+♥
    2♠   9+HCP 5+♠
    2NT♠ 10-12 HCP NATURAL
    3♣   CUE-BID 9+HCP 4+♦
    3♦   PREE.
         
1♦ - (PASS) - 1♥ - (2♣) BY OPPONENTS

    PASS♠MIN. OR TRAP PASS (CAN BE 15-17 BALANCED)
    DBL♠ 14+HCP 3♠(SUPPORT)
♠        IF OPPONENTS PASS
♠           NEW SUIT F1R
♠           SIMPLE RAISE OR REBID SIGN-OFF
♠           JUMP RAISE OR JUMP REBID INV.
♠           ALL NT NATURALS
♠        IF OPPONENTS BID
♠           DBL PENALTY
♠           NEW SUIT F1R
♠           SIMPLE RAISE OR REBID SIGN-OFF
♠           ALL NT NATURALS
    2♦   6+♦ NATURAL
    2♥   NATURAL REVERSE 18+HCP
    2♠   UNBALANCED 11-14 HCP 
    2NT♠ 18-20 HCP BALANCED
    3♣   FG 6+♦ OR 18-20 BALANCED W/O ♣ STOPPER 
    3♦   6+♦ 15-17 HCP
    3♥   6♦/5♥ 12-14 HCP
    3♠   4♠ UNBALANCED 15-17 HCP
    3NT♠ 4♠ 5♦ 2-2 OR 4♠ 4♦ 4-1 18+HCP
    4♣   4♠ SPLINTER 18+HCP
    4♦   6+♦ SOLID 4♠ 18+HCP
    4♥   4♠ SPLINTER 18+HCP


FORCING REBIDS BY OPENER AT COMPETITION:

        2NT AND 3 LEVEL BIDS BY OPENER ARE FORCING BIDS IF RESPONDER MADE A
        FORCIBG BID.CUE-BID AT 2 LEVEL BY OPENER IS MIN. OR FG RAISE.
        
EXAMPLE:  1♦  (1♠)  2♦  PASS
        ?

        2♥      MIN. 2+♥
        2♠      MIN. OR FG ♥ RAISE.
        2NT♦    FORCING (GOOD 13-14 HCP OR 18-20 BALANCED)
        3♣      AUTO FORCING (5/5 BETTER THEN MIN. OR STRONG) NO ♥ FIT
        3♦      AUTO FORCING (6+♦ BETTER THEN MIN. OR STRONG) NO ♥ FIT
        3♥      FG RAISE               
        3NT♦    15-17 BALANCED OR UNBALANCED.

        CAN STOP AT 4 MINOR WHEN WE ARE IN AUTO FORCING.