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

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Market context

Grind Back and Carstensz were due to meet in a best-of-three lower-bracket match in the Southeast Asia Closed Qualifier playoffs for The International, with the market resolving to **Grind Back** if they won, **Carstensz** if they won, and **50-50** if the series was cancelled, tied, or dragged on without a result inside the settlement window. In prediction-market terms, a **YES** share pays out if the named outcome happens, while a **NO** share pays out if it does not; here, the current crowd price of 100% YES implies the market was effectively treating the outcome as fully settled in Grind Back’s favour.

That reading is easier to understand against the recent form data around the match. Strafe listed Grind Back as having won 3 of their last 5 matches and Carstensz as having won 4 of their last 5, yet the same match page later recorded Grind Back winning the series 2-0 on 21 June 2026. Other live-score and results pages likewise show the fixture as a completed best-of-three in The International 2026 Southeast Asia Closed Qualifier, which is the kind of evidence that typically drives a market to a near-certain price once a result is confirmed.

For traders, the main catalysts are straightforward: the official bracket status, whether the series is marked complete, and any organiser or platform update that could change settlement timing. Because this market had a fixed cut-off of 21 June 2026 at 08:00 UTC, the key question is not team strength but whether the match was officially played and recorded before the window closed. If a fixture is postponed, abandoned, or overturned after the fact, those are the sorts of administrative changes that can matter more than in-game performance for the final resolution.

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

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?

On Prediction Market UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 it cost to trade on Prediction Market UK?

Zero. Prediction Market 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, Prediction Market 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.