Re: Different styles for BB defens
 

He doesnt call your checkraise, you gain the bet from when he bets the flop following up from his PFR. If you bet out you dont gain this bet from him because he folds.

If you have a weak holding then it is better to get him to fold on the flop rather than have him do some funky turn moves on you when any overcard hits that may or may not improve his hand.

When you have a high pair such as a pair of Js Qs Ks or As then you want him to pay on the turn so checkraising is not the play.

When you have a weak pair then it is better to define your hand on the flop so he folds his 2 cards which may be correct in drawing against you. Most times he will not know whether he has 2 overcards though because you checkraise a pair of 4s on a board of Q74, he may have 96 but he cant call it.

Going for the turn checkraise is usually a weak play against all but the most aggressive players. Most players will generally check through the turn if the have nothing and there is a caller.

You are essentially giving him 2 freecards to beat you because his auto flop bet is a steal if you check to him on the turn he will take the freecard.

With a weak holding you cant be giving potentially 2 freecards to someone and expect to hold up most of the time.

The turn checkraise is also a powerful move but if he calls it then do you give up the pot on the river or do you bet again? Its too much to risk on a weak hand IMO.

Re: Different styles for BB defens
 

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With a weak holding you cant be giving potentially 2 freecards to someone and expect to hold up most of the time.

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That is exactly what you can expect. The equity of a flopped pair -vs- two overs is better than 75:25 taking both cards to come into account. It will hold up MOST of the time, by definition.

Obviously you do not want to be giving free cards, which is why this is very reliant on your read of opponent. It is no use saying "most opponents" will check this through so the play is bad, that is just standardising the play. The point should be, where you have an aggressive player who will bet both streets, you can consider the Turn CR. You are 86:13 to still be ahead on the Turn.

And as for "most opponents" I think there are quite a few threads which talk about stealing PF and playing bet-bet-check to prevent opponent (defender) getting any free cards to draw out on you by catching a pair. If this is the standard line I am not quite sure how it is that most PFRs are also playing bet-check? Clearly all lines are read dependent and this one requires opponent to be aggressive enough to play bet-bet-check (or even bet-bet-bet). It is certainly correct to discuss alternatives with a view to their application given specific reads. Playing the same line against everyone is not max EV, I am sure you agree.