aguahombre, on 2013-January-07, 17:10, said:
I am not sure why it makes a difference to this discussion whether we are playing constructive raises or not. If we are, this isn't one; it is an invitational raise. If not, this hand is still an invitational raise.
If we are not playing constructive raises and we raise 1M-2M, we accept game tries with constructive raise values; we don't accept if our raise is weaker and hasn't grown because of the type of invitational game-try used.
If we are playing constructive raises, the raise itself is not a game-invite; it just narrows the range of the simple raise in case the auction gets competitive --maybe that information at that particular time is vital to some pairs, we don't find it to be.
Absent constructive raises, and ignoring Bergen, splinters etc, for these purposes, we generally have 3 major suit raises:
single raise: 5 to 9 hcp, tho could be a really soft 10 especially nv or at mps
limit raise: good 9 to bad 12...some would say 12 is too much but I am discussing an awful 12 count
gf raise: better than limit
These ranges are not necessarily optimum, and I don't mean that you may disagree with my exact parameters. Change them to be your preference and I will still maintain that they are not optimum. You will overbid to some games opposite all of them and stay out of a few good games opposite all but the gf raises.
By adding more forms of raise, we allow for better, more precise definition of hand valuation, which automatically increases bidding accuracy. We could simply divide the single raise into two categories and leave the limit and gf unchanged, but that seems inefficient, unless we are very comfortable with our limit and gf boundaries.
By using the constructive raise to include not only the sound single raise but also the previously minimum limit raise, we can increase the precision of the remaining limit, even if we slightly increase its upper range, thus ever so slightly beefing up our gf raise.
When we do this, we no longer need be aggressive with our limit raise: what was previously a bad limit raise is now a good constructive. That makes it safer for opener to accept the invite when we limit, and this hand is a classic example.
If we only had 3 ranges, this hand falls, imo, very close to the dividing line between limit and gf, and I can understand the urge to gf at imps. But with constructive raises, this hand is now, imo, clearly within the limit raise spectrum that starts about 1.5 hcp (or equivalent value) higher than before and ends about .75 points higher than did the earlier range.
All of these figures are estimates and I haven't tried to be analytical, plus I don't value hands this way at the table. I use the figures to illustrate the point, not to say that this is a 'precisely accurate' description.
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari