Wacky HU action, Lagtard vs Lagtard, river bluffraising

[Grisgra]

I think it's probably pointless to post this question as at some point against opponents like this it's mostly about 'feel' but I think I might learn something.

HU, 30/60. Both players are laggy, both play reasonably well (arguable, admittedly), both players clearly think the other is full of [censored] and are certainly never folding ANY piece, no matter how scary the board.

Lagtard A has been 3-betting preflop a lot with maybe 50% of his hands, and hasn't been hurt by it, though Lagtard B is up about 10BB.

Example: About 20 hands ago, Lagtard B raised preflop, was 3-bet by Lagtard A, flop came 623. Check, call.

Turn was an Ace, putting two clubs out there, A bets, B raises, A calls with his K8o. River blank, check/call, Lagtard B's K-high is good.

Which leads us to this hand and the question of river bluff-raises.

Lagtard B raises, Lagtard A 3-bets, Lagtard B calls.

Flop is A [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/diamond.gif[/img].

B bets, A calls.

Turn: 5 [img]/images/graemlins/club.gif[/img].

B bets, A raises, B raises, A calls.

River: K [img]/images/graemlins/heart.gif[/img].

B bets.

Situation #1: A has a busted ISD. Is raising +EV?
Situation #2: A raises. B has a busted ISD. Is raising +EV?