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Poker Strategy
EV in Poker:
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What Is Expected Value?
Expected Value (EV) is the average result of an action if repeated across hundreds of identical situations. A single hand tells you nothing — EV tells you what happens over the long run.
Great players always chase the plus sign, regardless of short-term outcomes.
Think of it like a coin flip where heads pays $3 and tails costs $1. You might lose the first flip — play it 1,000 times and you profit massively. That’s the power of acting on EV.
The EV Formula
Every EV calculation uses the same structure. Estimate your equity against the opponent’s range, then plug it in:
%W chance you win$W chips you win%L chance you lose$L chips you risk
Note: the chips you can win are usually larger than the chips you risk — because the pot already had money in it before you acted. That’s what makes many calls profitable even with less than 50% equity.
Three Real Examples
You flop top set. Opponent shoves all-in.
9♠9♥
Board:
9♦7♣3♠
Top set on a dry board — you’re an 85%+ favourite against any realistic range. No calculation needed: this is always +EV. The point is to recognise it instantly and not overthink it.
Nut flush draw vs. a pot-sized bet
A♥7♥
Flop:
K♥8♥2♣
Pot = $100. Opponent bets $100. You call $100 to win $200 total. Flush draw completes ~35% by the river.
EV = $70 − $65 = +$5
+$5
Slim — but positive. Over 100 identical spots, that’s +$500 in pure expectation. Always call this.
Second pair vs. a big river bet
Q♠J♥
Board:
A♣Q♦7♠3♣5♥
Pot = $200. Opponent fires $150 on the river. You estimate they’re bluffing 40% of the time.
EV = $140 − $90 = +$50
+$50
Reading bluff frequency accurately is what separates break-even players from winners. The math rewards correct reads.
Quick Reference: Common Spots
| Situation | EV | Action |
|---|---|---|
| Top set vs. all-in on dry board | +EV (strong) | Always call |
| Nut flush draw vs. pot-size bet | +EV (slim) | Call |
| Bluff-catch when villain bluffs >40% | +EV | Call |
| Drawing to bottom pair vs. large bet | −EV | Fold |
| Open-raising trash hands out of position | −EV | Fold |
Factors That Modify EV
The formula is the foundation. These variables adjust it in practice:
- Implied Odds — If you hit your draw, can you win extra chips on later streets? Deep stacks amplify this.
- Reverse Implied Odds — Some draws still lose to better hands when completed. Factor in losing more, not just winning.
- Fold Equity — A raise gives you a second path to winning (opponent folds). This adds EV on top of raw equity.
- Multiway Pots — More opponents means your equity is split further. Hands that are +EV heads-up may be −EV three-ways.
- Mental State — Even a perfect strategy has zero EV value if fatigue or tilt causes errors. Play sharp or don’t play.
EV Only Pays in the Long RunA +EV call can still lose this hand — that’s variance. Repeat it across thousands of hands and the math always delivers. Stay disciplined, ignore short-term results, and let EV compound in your favour. |