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

Platform comparison

Market context

Iron Wing and Team Spirit will compete in the upper bracket quarterfinals of The International 2026, Dota 2's premier annual championship. The best-of-three match is scheduled for 19 August 2026 at 10:00 PM ET. The current 53% crowd probability favours Iron Wing, reflecting marginal confidence in their advancement. Settlement occurs by 20 August 2026 at 08:00 UTC, with a 14-day postponement window extending to 2 September 2026 at 23:59 ET.

Team Spirit's historical record at The International provides the primary comparative frame. They reached the grand finals in 2021 and 2022, establishing themselves as consistent deep-run contenders. Iron Wing's trajectory through qualifiers and group stages will determine whether the crowd's slight lean reflects genuine form advantage or uncertainty between two capable rosters. Recent roster stability, scrim results, and patch adaptation speed typically correlate with upper bracket performance, though these signals remain opaque until official team announcements.

Traders monitoring this market should track official schedule confirmations from PGL, the tournament organiser, particularly given the tight settlement window. Roster changes or player illness announcements in the 48 hours before the match carry outsized weight. Conditional order logic would benefit from monitoring related markets—Iron Wing's and Team Spirit's respective tournament elimination odds provide correlated signals. The match's position as a quarterfinal (not group stage) means both teams have already demonstrated sufficient strength to reach this stage, reducing the probability of extreme upsets relative to earlier rounds.

Methodology

This page reviews Dota 2: Iron Wing vs Team Spirit (BO3) - The International Playoffs across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Fees, which mirrors the Polymarket order book at 0% fees.

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.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.