Today, one of the players in my improver group held:
and opened 2H (strong). The auction continued 2NT (neg) - 3H and partner raised to 4H and all was well. The opener had her 8 tricks so what was the problem?
The issue is that anything more than 2H could have been a disaster. Partner had the AQ of clubs and a couple of hearts which enabled the contract to make.
A strong two should not be based just on 8 tricks. It should be reserved for the kind of hand where you are afraid that partner will pass a 1-level opening bid yet game could still be available. Remember that partner will always respond with 6+hcp.
Thus on the hand quoted there is no need to rush things with a 2-bid. If partner doesn't have 6hcp it is unlikely that game will make.
A better two bid would be a hand like this:
Here any one of three cards (SK, HA,CA) and a couple of low spades will guarantee game and you are afraid that with just 4hcp partner will not recognise this and may pass. So open 2S if this bid is available as a strong bid.