Martingale Ruin

🎰 "Just double your bet after a loss, and one win recovers everything — isn't that an unbeatable system?" Martingale Ruin lets you watch exactly why that 'sure-win' betting system eventually wipes out your entire bankroll. The rules are simple. On a European roulette wheel (a single 0; even-money win rate of 18/37 ≈ 48.6%) you bet on an even-money outcome like red or black. After a loss you double the next bet; after a win you reset to the base bet. You grind out small gains — until one long losing streak makes the bet size explode exponentially and your balance hits zero. ▣ Great for · Anyone wondering whether a "sure-win" betting system can really work · Seeing expected value, the house edge, and the gambler's fallacy come alive · Probability or statistics class demos and presentations ▣ Features · Real-time balance curve — watch it climb slowly, then collapse in a single moment · Metrics: rounds played, current & peak balance, next bet, wins/losses, longest losing streak · Choose starting bankroll (1M/5M/10M), base bet (10k/50k/100k) and simulation speed · Save results to SQLite and compare ruin vs. survival runs · A clear explainer of why Martingale always busts (house edge, exponential growth, gambler's fallacy) · Free, offline, Korean/English ▣ Note · All amounts and bets are virtual numbers for exploring concepts and are unrelated to real gambling or investing. · No accounts, no personal data collected (advertising identifier excepted). Math doesn't lie. Run the "unbeatable" system and see how it really ends.