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Dota 2: BoomBoys vs OG (BO3) - The International Group Stage

"Dota 2: BoomBoys vs OG (BO3) - The International Group Stage" on Polymarket, Kalshi and Is Kalshi Legal in California — what traders need to know about platform choice, KYC and tax law.

Match Winner 76% Game 1 Winner 72% Game 2 Winner 65% Total Kills Over/Under 50.5 in Game 2? 63% Volume: $1.3M Liquidity: $438K Closes: 13 Aug 2026
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Dota 2: BoomBoys vs OG (BO3) - The International Group Stage

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Is Kalshi Legal in California) Pick
polygram.ink (preferred broker)
76% 24% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Go to the live market →
Polymarket (direct)
polymarket.com
76% 24% 0% Geo-blocked in US/UK/EU USDC, on-chain Go to the live market →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Go to the live market →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Go to the live market →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Go to the live market →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
Match Winner76%
Game 1 Winner72%
Game 2 Winner65%
Total Kills Over/Under 50.5 in Game 2?63%
Total Kills Over/Under 50.5 in Game 1?63%
Ends in Daytime50%
Both Teams Beat Roshan50%
Both Teams Destroy Barracks50%
Any Player Ultra Kill50%
Any Player Rampage50%
Ends in Daytime50%
Both Teams Beat Roshan50%
Both Teams Destroy Barracks50%
Any Player Ultra Kill50%
Any Player Rampage50%
Ends in Daytime50%
Both Teams Beat Roshan50%
Both Teams Destroy Barracks50%
Any Player Ultra Kill50%
Any Player Rampage50%
First Blood in Game 2?50%
First Blood in Game 1?50%
O/U 2.5 Games42%
Total Kills Over/Under 55.5 in Game 1?38%
Game Handicap: BoomBoys (-1.5) vs OG (+1.5)29%

Market context

The International 2024's Group Stage features a best-of-three encounter between BoomBoys and OG, two organisations with markedly different trajectories in competitive Dota 2. OG, the two-time International champions (2018, 2019), enters as the established favourite despite recent roster instability. BoomBoys, representing the Southeast Asian region, qualified through regional qualifiers and carry less historical weight in tier-one competition. The match is scheduled for 12 August at 10:00 PM ET, with settlement occurring by 13 August at 08:00 UTC.

Historical precedent suggests the 68% implied probability favours OG's experience and pedigree, though The International's group stage format has produced upsets. OG's last International appearance (2022) saw them eliminated in the group phase, whilst BoomBoys' qualification itself represents a competitive achievement. Comparable matchups between established Western organisations and emerging regional teams at recent Internationals have split roughly 60–40 in favour of the higher-seeded team, making the current odds reasonable but not extreme.

Traders should monitor roster confirmations and scrim results circulating in the Dota 2 community in the 48 hours preceding the match. The CFTC's regulatory reach over US-based prediction markets and Germany's GlüStV framework both treat esports outcomes as eligible events, though accessibility varies by jurisdiction. For traders in no-KYC jurisdictions where positions under $1,500 USD remain unverified, this market's binary settlement structure and defined resolution criteria provide straightforward exposure to the match outcome without additional compliance friction.

Methodology

This overview of Dota 2: BoomBoys vs OG (BO3) - The International Group Stage reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

Resolution & payout

On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.

FAQ

Is Polymarket legal in my country?
Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legal in California has a different geo footprint.
How are winnings taxed?
Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
What happens during a tax audit?
You're responsible for documenting your trades. Is Kalshi Legal in California exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
Are prediction markets gambling?
Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
What if regulation changes?
If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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