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

Platform comparison

Market context

Iron Wing and BoomBoys will face off in a best-of-three lower bracket elimination match during The International 2026 playoffs, scheduled for 20 August at 22:00 ET. The winner advances; the loser is eliminated from the tournament. The current crowd-implied probability of 46% for Iron Wing suggests near-parity, with marginal favour toward BoomBoys at implied 54%.

Historical performance data from recent International qualifiers shows that lower bracket round one matches frequently feature unpredictable outcomes when teams are closely matched in rating. Teams entering from regional qualifiers often display high variance in early playoff matches, particularly when facing unfamiliar opponents or after extended preparation periods. Iron Wing's recent tournament placements and head-to-head record against BoomBoys will be material; if either team has won the majority of recent encounters, that historical edge typically shifts implied probabilities by 3–8 percentage points in prediction markets relative to neutral assessments.

Traders should monitor roster confirmations and any last-minute substitutions announced before the match window, as Dota 2 competitive rosters occasionally shift in the weeks preceding The International. Scheduling changes or technical delays affecting earlier matches could compress preparation time for both teams. The settlement window closes 21 August at 08:00 UTC, providing roughly ten hours post-match for official results confirmation. Any postponement must occur by 3 September 23:59 ET under the contract terms, creating a defined window for rescheduling disputes.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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.

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.

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 vs Polymarket 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.