Anchor Slip.

what it is.

You pick the one bet you’re sure about, your “lock.” Anchor finds the legs that get more likely when that bet hits, builds a parlay around it, and prices it the way a sportsbook prices a same-game parlay. It shows exactly what each leg costs or earns compared with betting the lock straight. There are no AI picks: every number comes from posted odds and probability math.

highlights.

• Same-game parlays are priced the way books actually pay them, not with the inflated numbers a generic parlay calculator shows.
• Each leg shows its cost (the book’s margin) against the payout it adds, so you can see when a parlay is worth it.
• Safe, balanced and aggressive builds with guardrails against long shots and redundant legs.
• A Monte Carlo simulator shows how repeated bets play out: chance to be up, bad-luck runs and drawdowns.
• The pricing math is covered by unit tests.

how it's built.

Next.js 16 with React 19, TypeScript and Tailwind CSS 4. Firebase handles sign-in, Firestore and a shared server-side odds cache, with live odds from a sportsbook odds API, subscription billing, and privacy-first analytics.

• Next.js
• TypeScript
• Firebase
• probability