Part: Part Ten - Adjusting to Different Stacks

You can't bluff a committed stack

Pre-flop
Blinds 400 / 800 (100 ante)Pot 2,100 (2.6 BB)Big blind is committed • no fold equityBTN7♠4♠● 50,000 (62.5 BB)YOUto actSBfoldsBB● 1,600 (2 BB)2 BB shortwill callD

Folded to you on the button with 7♠4♠. The big blind is a 2 BB short stack who is pot-committed and will call almost anything.

Button with 7♠4♠; the BB is a 2 BB stack who'll call any two. Best?

WhyFold. You can't steal from a pot-committed short stack - he calls a raise or a shove with any two cards, so there's zero fold equity. Raising just builds a pot with 7-4 against a random hand. Only commit chips against him with a hand you're happy to show down.
What happensYou fold the trash.  No fold equity means no steal.
A pot-committed short stack can't be bluffed - with no fold equity, you stop trying to steal and only put chips in against him with hands that beat his calling range.

You can't steal from a committed short stack - with zero fold equity, only commit hands you're happy to show down, and fold the trash.