VPIP from SB

Overview

VPIP from SB (Voluntarily Put Money in Pot from Small Blind) is a key statistical indicator measuring a player's willingness to enter pots from the small blind position. Unlike overall VPIP, it specifically focuses on the small blind because this position is the most disadvantaged postflop (out of position, OOP) and the player has already forced in half a blind, making the strategy unique.

Calculation

This stat is calculated by dividing the number of hands in which the small blind voluntarily enters the pot by the total number of hands in that position. Voluntary money includes calls, raises, or all-ins, but excludes checks (when the big blind has not raised, allowing the small blind a free flop) and completing the blind (i.e., simply checking). For example, if a small blind player voluntarily calls or raises 30 times out of 100 hands, their VPIP from SB is 30%.

Typical Range and Interpretation

• Tight-Aggressive (TAG) players: Typically have a VPIP from SB between 20%-30%, only entering with quality hands (e.g., pairs, high cards, suited connectors) to avoid trouble out of position.
• Loose-Aggressive (LAG) players: May reach 35%-50%, exploiting the small blind discount (half a blind) to widen their range, but requiring high skill to compensate for positional disadvantage.
• Extremely tight players: Below 15%, only playing strong hands against raises, but may miss opportunities to steal blinds.

Strategic Implications

1. Exploiting opponents: If an opponent's SB VPIP is too high, increase your raise frequency to punish their weak range; if too low, frequently steal their blind for profit.
2. Self-protection: The small blind should avoid calling with marginal hands because postflop you are out of position and the pot odds are unfavorable (already invested half a blind, but a call usually requires completing the big blind, offering roughly 2:1 odds).
3. Balance: A reasonable range should include some 3-bets (re-raises) and cold calls to prevent frequent squeezing by the big blind.

Comparison with Other Positions

Compared to BTN and CO VPIP (usually higher), the small blind's VPIP is significantly lower due to positional disadvantage and the forced blind, leading to more conservative decisions. The big blind, having already invested and having position postflop, may have a slightly higher VPIP than the small blind.

Notes

This stat requires a sufficient sample size (at least several hundred hands) to be statistically meaningful. It is also affected by player style, blind level, and opponent adjustments. In tournaments, ICM pressure further reduces the small blind's entry rate.