Will Russia capture Kostyantynivka by 2025?

Platform comparison

Market context

Russia is grinding its way into Kostyantynivka, a pivotal stronghold in Ukraine’s eastern “fortress belt,” with small groups of soldiers infiltrating outskirts while neither side fully controls the urban core [7]. Despite Vladimir Putin’s claim that Russian troops have captured the city, independent maps like DeepState show forces remain near but not inside the settlement, echoing previous overstated assertions of imminent victory [1]. This mirrors the protracted battle for Pokrovsk earlier in 2026, where incremental infiltrations eventually led to full control after months of urban fighting [3].

Traders should monitor ISW’s weekly offensive assessments for shifts in tactical gains versus entrenched positions, as Russian advances have slowed since November 2025 despite heavy costs [2]. A September deadline for capturing Donbas has been set by the Kremlin, though analysts deem it unlikely to be met [3]. Key dependencies include Ukrainian counterattacks in Kupyansk and Oleksandrivka, which have successfully rolled back Russian efforts [2]. On platforms like Polymarket, implied probability (currently 0% YES) contrasts with Kalshi’s decimal odds, while fee structures and KYC requirements diverge significantly between these books and Betfair or Smarkets, affecting how this specific market is priced and settled.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Will Russia capture Kostyantynivka by 2025? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.