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BB Calling Range vs a 15bb Button Shove

Against a 15bb button all-in you call about 14% of hands from the big blind (29 hand classes) — much tighter than at 10bb. You are risking 14bb to win about 31bb, so you need roughly 45% equity, and the button is jamming a tighter 29%.

Chart

Call the jamMixed callFold

Two things move against you at once when the stack grows from 10bb to 15bb: the price gets worse (you must call 14bb instead of 9bb for a pot that grew by less), and the button's jamming range tightens from 36% to 29%. Both effects push in the same direction, which is why the calling range falls from 23% to 14%.

The hands that survive are the ones with raw showdown strength against a real range: medium pairs and up, ace-ten and better, KQ. The speculative calls that worked at 10bb — the smallest pairs, weak aces, suited kings — fall away because they were only ever calling on price, and the price is gone.

A subtle point most players miss: at this depth the button is also jamming fewer bluffs, so your marginal calls are running into more genuine hands. Do not extrapolate a "he shoves a lot" read from the 10bb chart to a 15bb spot — the same player shoving correctly is shoving a different, stronger range.

FAQ

How wide should I call a 15bb shove in the big blind?

About 14% — roughly 29 hand classes: medium pairs and up, ace-ten and better, KQ and the strongest suited broadways. That is far tighter than your calling range against a 10bb jam (23%), because the price is worse and the button's jamming range is tighter.

Why do I call less at 15bb than at 10bb?

Two reasons stack up. You must call 14bb instead of 9bb for a pot that has not grown proportionally, so you need more equity (~45% instead of ~42%); and the button jams 29% instead of 36%, so the range you are up against is stronger. Both say: fold more.

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