Double Barreling a Rock?

[Erik343]

How many bluffs or barrels would you recommend firing against a rock in general?
I am playing $1/$2 no limit. Assume that I am in position and the pot is heads up.

 

[hobojim1247]

Against a true rock, then 0 is the correct answer. Any money put in the pot is just a donation. The only exception is if you flop a hand with 21 outs to the nuts.

 

[gustav197poker]

Against a rock you should time your aggressiveness and reserve it primarily for strong value hands. Being in position you don't need to think too much about multi barrel of bluff.
The concept of rock is that of a player who probably knows how to withstand his opponent's aggressiveness when he has decent hands (and therefore also knows how to fold correctly), so we really expect little fold equity when we multi barrel (at least in 1/2 where players tend to be from wide ranges HU).
Greetings.