Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Map 1 Winner | 100% |
| Map 2 Winner | 100% |
| Match Winner | 100% |
| Map Handicap: ISG (-1.5) vs Grêmio Esports (+1.5) | 100% |
| Map 2 Total Rounds: Over/Under 21.5 | 100% |
| Map 1 Rounds Handicap: Isurus (-3.5) vs Grêmio Esports (+3.5) | 100% |
| Map 1 Rounds Handicap: Isurus (-6.5) vs Grêmio Esports (+6.5) | 100% |
| Map 3 Rounds Handicap: Isurus (-3.5) vs Grêmio Esports (+3.5) | 50% |
| Map 3 Total Rounds: Over/Under 21.5 | 50% |
| O/U 2.5 Games | 0% |
| Map 2 Rounds Handicap: Isurus (-3.5) vs Grêmio Esports (+3.5) | 0% |
| Map 2 Rounds Handicap: Isurus (-6.5) vs Grêmio Esports (+6.5) | 0% |
| Map 1 Total Rounds: Over/Under 24.5 | 0% |
| Map 1 Rounds Handicap: Isurus (-9.5) vs Grêmio Esports (+9.5) | 0% |
| Map 1 Total Rounds: Over/Under 21.5 | 0% |
| Map 1 Total Rounds: Over/Under 18.5 | 0% |
| Map 2 Total Rounds: Over/Under 24.5 | 0% |
| Map 2 Rounds Handicap: Isurus (-9.5) vs Grêmio Esports (+9.5) | 0% |
Market context
Isurus and Grêmio Esports are scheduled to meet in Round 5 of the BetBoom Storm Group Stage on 10 August at 19:00 ET in a best-of-three Counter-Strike encounter. The match carries a settlement window extending to 11 August at 05:15 UTC, providing a seven-day buffer for rescheduling before resolution defaults to 50-50 if no winner is determined. The 100% implied probability reflects either exceptionally high confidence in match completion or minimal liquidity depth in the market.
Historical precedent from South American Counter-Strike tournaments suggests fixture reliability remains moderate at best. Regional qualifiers and group stages have experienced delays owing to technical infrastructure, player visa complications, and scheduling conflicts with international LAN events. The BetBoom Storm format, however, operates under stricter broadcast commitments than smaller regional circuits, reducing cancellation risk substantially. Previous iterations of similar tournaments have seen matches postponed rather than cancelled outright, typically resolving within the extended window.
Traders should monitor official BetBoom communications and team rosters for late-stage roster changes or player absences, particularly given the compressed schedule of group-stage play. Recent fixture announcements from the tournament organisers and any statements from either organisation regarding preparation status or logistical constraints would signal material shifts in completion probability. The settlement window's extension to the following day suggests organisers anticipate potential scheduling friction; any announcement of fixture postponement before 10 August would be the primary catalyst for market recalibration.
Methodology
Sports-specific comparison page for Counter-Strike: Isurus vs Grêmio Esports (BO3) - BetBoom Storm Group Stage. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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