Effective stack divided by the current pot: mathrmSPR=S/P. It is a design parameter, not a statistic. Commitment bands: SPR <2 top pair good kicker; 2–4 top pair top kicker and strong draws; 4–7 two pair+; 7–13 sets and made straights/flushes; >13 nutted hands only. A 3-bet to 8 bb from 100 bb leaves SPR ≈ 4; suited connectors are defunded when SPR collapses because their entire value is rare, enormous pots.