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

Platform comparison

Market context

Dplus KIA’s BO3 against KT Rolster in the LCK Legend Group is priced by the crowd at **59% for Dplus KIA**, while Polymarket’s own team page shows a slightly firmer **62% Dplus KIA / 39% KT Rolster** split, implying only a modest gap between market venues.[9][14] That is broadly consistent with the teams’ recent head-to-head history: Dplus KIA lead the all-time series 17–12, but the most recent meetings have been closer, with a 3–3 split over the last 12 months and KT taking a 3–2 series in June 2026.[6][4] For a best-of-three, that kind of record usually supports a favourites-leaning price without making the dog a long shot.

The form picture is mixed rather than one-sided. TipsGG’s recent aggregates show Dplus KIA with a slightly weaker 30-day win rate than KT Rolster, but still a higher overall rating and a positive all-time map edge, which helps explain why the contract is not near a coin-flip.[6] Recent match pages also suggest both teams remain capable of taking games off each other, including a Dplus KIA win over KT in a 2024 LCK summer game and a KT series win in 2026, so traders should expect the market to react more to current lineup news and form than to legacy brand strength alone.[10][11]

The main catalysts to watch are the official match start, any last-minute roster or scheduling change, and whether the series remains on the intended August 9 slot, since the settlement rules fall to 50-50 if the match is cancelled, tied, or delayed beyond seven days without a winner.[14] The posted settlement window ends at 2026-08-09T14:00:00Z, so any disruption around broadcast timing, venue operations, or a forced postponement would matter materially even if the teams are otherwise unchanged.[14]

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

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 PolyGram. 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.

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.

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.