Trading-interview prep · after hours
The house knows the odds. Now you do.
Pick a table. Every game opens full-screen, with a one-time briefing.
Daily Gauntlet Ten questions. Same for everyone. One ranked try a day.
LeaderboardToday and all time
- 01Card GamePrice a random contract. Buy, sell or pass.
- 02Market Making DiceQuote three dice and survive informed flow.
- 03Trading GameFive hidden cards. Re-price as each one turns.
- 04ETF ArbitrageNAV against price, on a 15-second clock.
- 05Fermi Estimation90% ranges for questions you can't look up.
- 06Event ContractsUpdate with Bayes, then make a yes/no market.
- 07Higher or LowerCount the deck and size each bet with Kelly.
- 08Betting BoardSpot mispriced odds and lock in arbitrage.
- 01Pot OddsCall or fold: your equity against the price.
- 02Equity CalculatorAny hand against any hand, 20,000 runouts.
- 03Bluff MathsHow often a bluff must work, and how often to defend.
- 04Rules & Hand RanksReference: how Hold'em works.
- 05Where to PractiseReference: solvers, sims and play-money tables.
- 01Expected ValuePrice any bet and watch the variance.
- 02Linearity & SpreadWhy risk grows with the square root of n.
- 03Stop or ContinueOptimal stopping with a die.
- 04Bayes in Odds FormPrior odds × likelihood ratio = posterior.
- 05Kelly SizingHow much to bet when you have an edge.
- 06Finance & Econometricst-stats: how many hands prove you have skill.
Modelled on the Tradermath market games. Probabilities exact where stated; equity by simulation. Source on GitHub.