DEVELOPPEMENTS OF 1♥ OPENINGS OVER OPPONENTS INTERFERENCE

1♥ - (DBL) BY OPPONENTS

    RDBL♠9+HCP 
    1♠   6+HCP 4+♠
    1NT♠ 6+HCP TRANSFER TO ♣ (NATURAL OR LEAD DIRECT)
    2♣   6+HCP TRANSFER TO ♦ (NATURAL OR LEAD DIRECT)
    2♦   8+HCP 3+♥ GOOD RAISE
    2♥   5-8 HCP 3+♥
    2♠   8+HCP 5+♠ 4♥
    2NT♠ 9+HCP 4+♥
    3♣   9+HCP 4+♥ 5+♣
    3♦   9+HCP 4+♥ 5+♦
    3♥   PREE. 4+♥
     

1♥ - (1♠) BY OPPONENTS

    DBL♠ 8+HCP 
    1NT♠ NATURAL CONSTRUCTIVE
    2♣   9+HCP 5+♣ 
    2♦   9+HCP 5+♦
    2♥   5-9 HCP 3+♥
    2♠   3♥ INV.+
    2NT♠ 4+♥ INV.+
    3♣   7-10 HCP 4+♥ 5+♣
    3♦   7-10 HCP 4+♥ 5+♦
    3♥   PREE. 4+♥
    3♠   10-12 HCP 4+♥ ♠ SING.
    3NT♠ 12-15 HCP NATURAL
    4♣   11+HCP 4+♥ 5+♣
    4♦   11+HCP 4+♥ 5+♦
    4♥   PREEMPT

1♥ - (2♣) BY OPPONENTS

    DBL♠ 8+HCP 4♠ 5-8 HCP 5+♠ OR 10+HCP
    2♦   9+HCP 5+♦
    2♥   5-9 HCP 3+♥ 
    2♠   9+HCP 5+♠
    2NT♠ 4+♥ INV.+
    3♣   8+HCP 3♥ INV.+
    3♦   7-10 HCP 4+♥ 5+♦
    3♥   PREE. 4+♥
    3♠   11+HCP 4+♥ 5+♠
    3NT♠ 12-15 HCP NATURAL
    4♣   10-12 HCP 4+♥ ♣ SING.
    4♦   11+HCP 4+♥ 5+♦
    4♥   PREEMPT

 
1♥ - (2♦) BY OPPONENTS

    DBL♠ 8+HCP 4♠ 5-8 HCP 5+♠ OR 10+HCP
    2♥   5-9 HCP 3+♥ 
    2♠   9+HCP 5+♠
    2NT♠ 4+♥ INV.+
    3♣   10+HCP 5+♣
    3♦   3♥ INV.+  
    3♥   PREE. ♥
    3♠   11+HCP 4+♥ 5+♠
    3NT♠ 12-15 HCP NATURAL
    4♣   11+HCP 4+♥ 5+♣
    4♦   10-12 HCP 4+♥ ♦ SING.
    4♥   PREEMPT


1♥ - (P) - 1♠ - DBL BY OPPONENT

    PASS♠CAN PLAY 1♠ DOUBLED 3 OR 4♠
    RDBL♠WANT TO PLAY 1♠ REDOUBLED
    1NT♠ 16+HCP RELAY
    2♣   5+♥ 4+♣ 11-15 HCP

    SYSTEM ON.