Apart from 6 or 7 events a year it will now be necessary for 1♥ and 1♠ opening bids to show that suit.
I can fully understand the Laws and Ethics committee's decisions for short round matches where preparing a proper defence, to amongst other previously allowed bids like a 1♥ opener showing 9-15 bal, isn't really practical.
My question is - to what extent should less frequent national tournament players be protected by the authorities from the unknown? Its not clear to me indeed that there are any principles behind setting the rules (apart from keeping the majority of the members who would prefer not to play against anything difficult happy)
For example I think the following system would be allowable still in the other national events but wouldn't be particularly enjoyable to play against?
1♣ = 3♥s or 14+(not unbal with 5major) or 16+(any) or natural
1♦ = 3♠s or nat or 18-19 bal
1♥ = 4+ possible canape
1♠ = 4+ possible canape
1nt = ?
2 level bids = a suit or not the same suit - where the particular suit varies with position and vulnerability (i.e. so you need a matrix to see all possibilities)
I'm not claiming this system has great merit but the fact that it is allowed when other stuff has been banned because of the difficulty in defending against perhaps shows why a principles based system is needed? (apologies if any of the system isn't allowed
