[Ant590]

What is the "standard" meaning of these doubles/2NTs

1.
(1♦) - pass - (pass) - dbl
(2♦) - dbl

2.
(1♦) - pass - (pass) - dbl
(2♣) - dbl

3.
(1♦) - pass - (pass) - dbl
(2♦) - 2NT

[awm]

1. Penalty is standard. Some people do play this as responsive.

2. Penalty is standard and almost universal. 2♦ would be the pick a major/responsive double type hand.

3. Natural is standard. Typical would be something like a balanced 12-count with a single diamond stop. Some would play this as lebensohl to distinguish a fairly weak hand with lots of clubs from a game invitation in clubs.