Dota 2: Iron Wing vs Team Spirit (BO3) - The International Playoffs

Platform comparison

Market context

Iron Wing face Team Spirit in The International's upper bracket quarterfinal on 19 August 2026, with the match scheduled for 22:00 ET. The 53% crowd probability favours Iron Wing marginally, though recent roster movements and scrim results from the past 48 hours have tightened expectations. Team Spirit's qualification from the lower bracket and subsequent preparation time may have shifted internal assessments, whilst Iron Wing's seeding advantage carries less weight in single-elimination format than in group stages.

Historical precedent from prior International playoffs shows upper bracket matches between similarly-ranked teams typically settle within 5–10 percentage points of even odds. When one team enters from lower bracket qualification, the probability gap narrows further; Spirit's run through lower bracket suggests they've solved critical draft vulnerabilities that plagued their group stage. Iron Wing's 53% edge reflects their higher seed and map pool consistency, but doesn't account for the momentum factor that lower bracket survivors often carry into knockout rounds.

Traders should monitor official patch notes through 18 August, as any hero adjustments within 72 hours of match time historically shift Dota 2 playoff probabilities by 3–7 points. Team Spirit's recent scrim leaks and draft tendencies will circulate on community forums; any evidence of new strategies or player substitutions could trigger repricing. The match must conclude by 20 August 08:00 UTC to settle within the window; postponement rules allow rescheduling through 2 September, though The International's fixture density makes delays unlikely.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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%.