When your partnership adopts the Colorado2Club conventions you have a great bid to show those awkward 18-19 HCP hands.
In the Extensile 2clubs convention, we have a bid sequences after 1 of a major - 2♣ to show a balanced 18-19 HCP. We no longer need this bid because we would …
2NT shows a 4-card support raise with a wide range of HCP
Not a preemptive raise (<6 HCP), we use the double raise to the 3-level to show very weak hands, but with good trump support. This supports the idea that the law of total trump (9) should play best …
One of the weaknesses (flaws) of the 2/1 bidding system is the Forcing NT bid. This bid is a very wide range (5-11 HCP), may or may not deny support for the opener's suit, and often forces the opener into a vague rebid that doesn't contribute to describing their …
In Modern American bidding, we follow Standard American and 2/1 bidding best practices. We open hands with 12-21 HCP and 5+ cards in a major, with 1 of that major.
It is in the responses to opening 1 of a major that Modern American shines as an improvement to …