LoL: ROSSMANN Centaurs vs BIG (BO3) - Prime League 1st Division Group A

Platform comparison

Market context

ROSSMANN Centaurs are scheduled to face BIG in a best-of-three League of Legends series, and in prediction-market terms a **YES** share pays out if ROSSMANN Centaurs win the match, while a **NO** share pays out if BIG win. If the series is not played, ends level, or runs so late that no winner is confirmed within the market’s settlement rules, the contract can resolve 50-50 instead.

The historical frame points strongly towards BIG. Recent match listings and head-to-head records show BIG has won all of the recent meetings against ROSSMANN Centaurs, including a 1-0 result on 7 July 2026 and a 2-0 series in April 2026, while ROSSMANN Centaurs have yet to beat them in the recorded rivalry. Strafe also lists BIG as the higher-rated side in this pairing and gives them the edge on recent form, which helps explain why the crowd price has drifted to 0% YES despite the match still being scheduled.

For traders, the main catalysts are straightforward: final confirmation that the BO3 starts on time, whether either roster changes before lock, and any schedule slip affecting the settlement window. Group-stage esports matches are vulnerable to late postponements, server issues, and broadcast rescheduling, so the key practical question is not only who is stronger on paper, but whether the series is actually completed before the deadline.

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.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.