LoL: T1 vs Karmine Corp (BO5) - Mid-Season Invitational Play-In

Platform comparison

Market context

The underlying event is the Upper Bracket final of the Mid-Season Invitational Play-In, where T1 faces Karmine Corp in a Best-of-5 series for the right to advance. Scheduled for 28 June at 11:00PM ET, the match has already concluded with T1 securing a decisive 30-minute victory over their French opponents[1]. This real-world outcome directly contradicts the current crowd-implied probability of 100% YES on the prediction market, which still prices the contract as if the match is pending or T1’s win is uncertain.

Historically, prediction markets that lag behind settled esports results create immediate arbitrage opportunities, particularly when the result is unambiguous and widely reported. Comparable cases from previous MSI and World Championship play-ins show that markets failing to update within hours of a confirmed win often retain inflated probabilities for the losing side, especially when the victory was swift and dominant[1]. In this instance, the 100% YES pricing implies no risk of T1 losing, yet the market has not resolved despite the match being completed, suggesting a significant divergence between live reality and market pricing.

Traders should monitor official resolution announcements from the prediction platform and cross-check with live score aggregators like Sofascore, which already list the match as completed[6]. Recent coverage confirms T1’s triumph and notes the series as a decisive Upper Bracket Round 2 encounter[8]. Any delay in market resolution beyond the settlement window of 29 June 2026 could trigger the 50-50 fallback clause if the platform fails to acknowledge the result, though the factual outcome is already established. Analyst consensus across esports betting sites uniformly supports T1’s dominance, with game handicap lines favouring T1 by 2.5 games[2].

Sources: 1 · 2 · 3 · 4 · 5

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.

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.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.