Part: Part Ten - Adjusting to Different Stacks

Call the short jam wide

Pre-flop
Blinds 400 / 800 (100 ante)Pot 6,100 (7.6 BB)You: big stack • call short jams wideBBK♦9♦● 60,000 (75 BB)YOUto actCO● 4,000 (5 BB)Short stackall-in 4,000 (5 BB)SBfoldsD

You're the big stack in the big blind. A short stack open-jams about 5 BB and it folds to you with K♦9♦.

Big stack in the BB; a short stack jams ~5 BB to you with K♦9♦. Best?

WhyCall. The jam costs a tiny fraction of your stack, and a short stack's open-jamming range is wide, so K-9 suited has enough equity to call profitably - and you can't fold him out anyway. Big stacks call short jams wide.
What happensYou call and are in good shape.  Cheap call, wide range.
Against a short stack's wide jam, your big stack lets you call far wider than usual - the price is small and you only need modest equity.

As the big stack, call short jams with a wide range - the cost is small relative to your stack and their shoving range is wide.