Why the big blind does not open

The big blind has posted 1bb. Before the flop, every other seat acts first. If UTG, HJ, CO, the button and the small blind all fold, there is nobody left to act. You take the blinds. There is no raise to make.

What the page shows

Every cell on the big blind chart is a fold. The open percent is 0. That is not a claim that the big blind never plays a hand. It is the rule of this one situation: open or fold, when the action reaches you and nobody has raised. From the big blind, that situation never asks you to open.

Where the big blind actually plays

The big blind faces other people's opens. Defending, calling, or 3-betting is a different chart, and this site does not publish one. Inventing a defend range and calling it a solver would be a fake. The study charts that do open are the other five seats.

Open the big blind chart and you will see a quiet grid. Then open the button chart if you want the widest raise on this site. 100bb 6-max cash, written here, not copied from a paid library.