This is the fifth in a series of articles introducing my GTO (Image: BrainyQuote.com) GTO open opportunities Suppose the action folds to us in the cutoff with 20 BB effective stacks. I wrote Part 3 and Part 4 as if our only options were shoving or folding, which was the way those game theory models were constructed. But we actually have two additional options; we can also limp or open. Arguably, game theory doesn’t provide for unexploitable limping. If limping is our most profitable play, it’s likely because we have an exploitive opportunity against our specific opponents. Many pundits claim we should rarely limp at all, especially when our stacks are short.