Licensed Esports Match Markets & Live Telemetry Hub
Compare regulated pre-match and live esports odds, map handicaps, and verified settlement rules while analyzing CS2 MR12 Buy Round Economy & Win Probability Conversion Calculator.
Explore Official Esports Lines at SportsBetting.ag Esports →Core Mathematical Parameters & Official Game Timings
- Implied probability converts decimal odds into the exact break-even win percentage required before bookmaker margin (overround) is removed: P = 1 / Decimal Odds.
- Expected Value (EV) measures long-term mathematical edge per unit staked: EV = (True Probability × (Decimal Odds – 1)) – (1 – True Probability). A positive result (+EV > 0%) indicates mathematical value.
- In-play probability models anchor to official developer patch parameters: CS2 MR12 regulation (24 rounds, $800 start money, $1400–$3400 loss bonus, 115 sec round, 40 sec C4), Dota 2 (20 min Tormentor, 8–11 min Roshan, 5 min Aegis), LoL (6 min Voidgrubs, 14 min Turret Plates, 20 min Baron), and Valorant (100 sec round, 45 sec Spike, 7 sec defuse).
What decides a CS2 buy round
Counter-Strike 2 plays MR12: twelve rounds per half, and the first team to thirteen wins the map. Each half opens with a pistol round on $800, so the two pistol rounds set up the economy for the rounds that follow.
A team that loses a round receives a loss bonus that starts at $1,400 and grows by $500 after each further consecutive loss, up to $3,400. That ladder is why a team that drops the pistol round often saves in round two or three instead of buying: one more loss raises the bonus, and a full buy becomes affordable a round later.
Use the console below to turn a price into an implied probability, then compare it with the economy state you see in the match: a side on a full buy against a saving side is a different round from two teams on rifles.
Interactive Odds, Margin & Expected Value (EV) Reference Console
- 1. Implied Probability (%) = (1 / Decimal Odds) × 100 | Margin (Overround) = [(1 / Odds A) + (1 / Odds B) – 1] × 100
- 2. Fair (No-Vig) Probability = Raw Implied Probability / Total Market Implied Probability Sum
- 3. Expected Value (EV %) = [(Estimated Win Probability × Decimal Odds) – 1] × 100
- 4. Quarter-Kelly Stake (%) = 0.25 × [((Decimal Odds – 1) × Estimated Win Probability – (1 – Estimated Win Probability)) / (Decimal Odds – 1)]