LoL: KT Rolster vs Dplus KIA (BO3) - LCK Round 3-4 Legend Group

Platform comparison

Market context

KT Rolster and Dplus KIA were already separated by only a narrow head-to-head margin before this week’s meeting, with Dplus leading the all-time series 17-12 and 40-34 in maps, so a 41% crowd price for KT is consistent with a live underdog rather than a long-shot. The freshest comparable case is the match played on 9 August, when Dplus KIA reversed a 1-0 deficit to win 2-1, after KT took Game 1 and then lost the next two maps, which is the sort of recent result that tends to anchor short-horizon pricing in a BO3 market.[4][9][14]

For a programmatic trader, the main inputs are not just the teams’ names but the match-state dependencies: whether the fixture stays on the published LCK schedule, whether the starting line-ups are unchanged, and whether there are any broadcast or venue delays before the 12 August settlement window closes. If you are running alerts or conditional orders, the cleanest trigger is any official schedule update from LCK or the organiser, because a postponement beyond seven days would force a 50-50 settlement under the market rules, while an abandoned series or an unplayed cancellation also resolves to 50-50. The current market is therefore most sensitive to pre-match confirmation rather than in-play rumours, since the result logic depends on whether the BO3 is actually completed.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

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.

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%.