Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Ends in Daytime | 100% |
| Both Teams Beat Roshan | 100% |
| First Blood in Game 1? | 100% |
| Game Handicap: AUR (-1.5) vs BoomBoys (+1.5) | 100% |
| Total Kills Over/Under 45.5 in Game 1? | 100% |
| Ends in Daytime | 91% |
| Ends in Daytime | 50% |
| Both Teams Beat Roshan | 50% |
| Both Teams Destroy Barracks | 50% |
| Any Player Ultra Kill | 50% |
| Any Player Rampage | 50% |
| Both Teams Destroy Barracks | 10% |
| Any Player Rampage | 10% |
| Both Teams Destroy Barracks | 1% |
| Any Player Ultra Kill | 1% |
| Both Teams Beat Roshan | 1% |
| Any Player Ultra Kill | 1% |
| First Blood in Game 2? | 1% |
| Game 1 Winner | 0% |
| Game 2 Winner | 0% |
| Match Winner | 0% |
| O/U 2.5 Games | 0% |
| Any Player Rampage | 0% |
| Game Handicap: BoomBoys (-1.5) vs Aurora (+1.5) | 0% |
| Total Kills Over/Under 50.5 in Game 2? | 0% |
| Total Kills Over/Under 50.5 in Game 1? | 0% |
| Total Kills Over/Under 55.5 in Game 1? | 0% |
| Total Kills Over/Under 55.5 in Game 2? | 0% |
| Total Kills Over/Under 60.5 in Game 1? | 0% |
| Total Kills Over/Under 60.5 in Game 2? | 0% |
| Total Kills Over/Under 65.5 in Game 2? | 0% |
| Total Kills Over/Under 70.5 in Game 2? | 0% |
Market context
BoomBoys and Aurora will contest a best-of-three match in Round 4 of The International 2026 group stage on 15 August, with the fixture scheduled for 01:00 ET. The encounter sits at the midpoint of the tournament's preliminary round, where seeding implications remain fluid and teams are still calibrating their draft strategies against the live meta. Current odds imply a 33 per cent chance of a BoomBoys victory, suggesting Aurora enter as clear favourites despite both squads having competed at comparable levels throughout the season.
Historical precedent from prior International tournaments shows that group-stage matches between regional representatives often hinge on preparation depth rather than raw skill disparity. When teams of similar calibre meet under time pressure—particularly in early rounds where coaching staff are still adjusting in-game calls—the outcome frequently correlates with which side has logged more scrim hours against the opponent's archetype. Aurora's recent LAN placements and reported roster stability suggest they have maintained consistent practice schedules, whilst BoomBoys have navigated several mid-season adjustments that may have disrupted their preparation cycle.
Traders should monitor team announcements regarding player availability and any last-minute coaching directives released in the 48 hours before fixture start. Schedule dependencies matter here: if either squad faces fixture congestion earlier in Round 4, fatigue could skew the matchup. The settlement window closes shortly after the scheduled start time, leaving minimal window for postponement claims. Any technical delays or venue issues that push the match beyond 15 August at 23:59 ET would trigger rescheduling provisions extending to 29 August, materially altering preparation conditions for both sides.
Methodology
Sports-specific comparison page for Dota 2: BoomBoys vs Aurora (BO3) - The International 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.
UK Frequently Asked Questions
- 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.
- 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.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
Trade Dota 2: BoomBoys vs Aurora (BO3) - The International… on Sport Prediction
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