Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
77% | 23% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
77% | 23% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Prague 2: Petr Brunclik vs Jan Kumstat Set 1 O/U 8.5 | 77% |
| Completed Match | 65% |
| Prague 2: Petr Brunclik vs Jan Kumstat Match O/U 21.5 | 53% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 1 O/U 9.5 | 52% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 2 Winner | 50% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 2 O/U 8.5 | 50% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 2 O/U 9.5 | 50% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 2 O/U 10.5 | 50% |
| Prague 2: Petr Brunclik vs Jan Kumstat Match O/U 22.5 | 46% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 1 Winner | 45% |
| Prague 2: Petr Brunclik vs Jan Kumstat | 43% |
| Prague 2: Petr Brunclik vs Jan Kumstat Total Sets: O/U 2.5 | 39% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set Handicap +/-1.5 | 38% |
| Prague 2: Petr Brunclik vs Jan Kumstat Match O/U 23.5 | 28% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set 1 O/U 10.5 | 28% |
| Prague 2: Petr Brunclik vs Jan Kumstat Set Handicap +/-1.5 | 27% |
Market context
The Prague 2 tournament will host a match between Czech players Petr Brunclik and Jan Kumstat on 17 August 2026. Both are domestic competitors with limited ATP ranking history, making this a lower-tier professional fixture typical of Challenger-level or regional circuit events. The current crowd-implied probability of 43% for Brunclik suggests moderate confidence in his advancement, though the spread reflects genuine uncertainty between two players of comparable standing.
Historical context for Czech domestic matchups shows volatile outcomes when both competitors lack significant recent form data or recent head-to-head records. Brunclik's implied 43% probability sits below the 50-50 baseline, indicating the market perceives a slight edge to Kumstat despite the market framing the question around Brunclik's advancement. This positioning is typical when one player carries marginally better recent results or ranking status, though the narrow gap suggests limited differentiation in public information. Comparable domestic fixtures in Central European circuits have resolved along ranking differentials of 50–100 positions, which often prove decisive at this level.
Traders should monitor the ATP entry lists and official Prague tournament draw releases, typically published 7–10 days before competition. Withdrawal announcements—common at regional events due to injury or scheduling conflicts—remain the primary catalyst that could trigger the 50-50 tie-break clause. The settlement window closes 24 August 2026, providing a one-week buffer beyond the scheduled date. USDC settlement on btc-prediction.bet will execute once official ATP or tournament records confirm the match outcome, with no dependency on macro crypto conditions or funding rate movements given the event's domestic, lower-tier classification.
Methodology
This page reads Prague 2: Petr Brunclik vs Jan Kumstat on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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%.
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