Dota 2: Grind Back vs Carstensz (BO3) - The International Southeast Asia Closed Qualifier Playoffs

Platform comparison

Active sub-markets

Market context

Polymarket is pricing **Grind Back at 100% yes** on this BO3, so the contract is effectively trading as if the match result is already locked in on Polygon using USDC and conditional tokens. The event itself is the lower-bracket round 2 meeting with Carstensz in The International Southeast Asia Closed Qualifier Playoffs, and that pricing is consistent with the market now sitting inside the settlement window, with the listed start time already passed[3][4].

That kind of near-certain price usually reflects either a completed result or a market that has become informationally stale after the match moved ahead of the venue’s published schedule. Comparable coverage from live score and results trackers shows Grind Back and Carstensz have already been paired in this qualifier, with Strafe listing Grind Back as the 2-0 winner and noting the match was played on 21 June 2026[1]. Strafe also records the pre-match crowd leaning the other way, with users favouring Carstensz 68.5% to 31.5%, which is a reminder that prediction-market prices can snap hard once the result is confirmed[1].

For traders, the main catalysts are not in-game swings but official tournament administration: bracket updates, postponed start times, walkover notices, and any clarification from organiser streams or score providers if the fixture was rescheduled or concluded off-platform. GosuGamers and Sofascore both listed the match as live on 21 June UTC, which supports the view that the decisive trigger is likely to be the published result rather than further gameplay volatility[3][4]. If no winner is formally determined before the settlement deadline, the market’s own rules fall back to 50-50, so the key risk is documentation, not draft quality or lane phase.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Dota 2: Grind Back vs Carstensz (BO3) - The International Southeast Asia Closed Qualifier Playoffs on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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.

FAQ

Is this market available outside the US?

Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on Kalshi UK?

Zero. Kalshi UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.

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.