About

Hey, I am Christoph. I am a Cloud Systems Engineer. When I am not deploying AWS infrastructure or doing heavy DIY work around the house, I build small tools. I like tools that solve exactly one problem and just work.

Why This Exists

When you understand the math behind 1-in-140-million odds, spending 2 EUR per ticket feels like lighting money on fire. But telling people "the expected value is negative" does not land. Showing them a chart where they lose money for 50 simulated years straight? That lands.

The expected return on a EuroJackpot ticket is about 47 cents per euro spent. Over a lifetime, the average weekly player burns through thousands of euros and gets back less than half. I wanted to make that visible. Not as a lecture, but as an interactive experience.

What It Does

  • Number Checker — Test your personal numbers against every historical draw. EuroJackpot since 2012, Lotto 6aus49 since 1955.
  • Lottery Simulator — Simulate up to 1000 years of draws. Watch the net profit chart go south.
  • ETF Comparison — See what your ticket spending would have grown to in a broad market ETF at 7% average annual return.
  • Birthday Trap — See how picking numbers under 31 forces you to share winnings with thousands of other birthday-pickers.

Technology

Built with Astro, TypeScript, Chart.js, and Tailwind. Historical draw data is fetched at build time from official sources, compressed, and embedded as static data. The site rebuilds automatically after each draw day via CI.

Everything runs client-side. No backend, no data collection. Your numbers never leave your browser.

Support This Project

If this tool helps you see the math clearly, you can support the project in two ways.

Option 1: Cover hosting costs. You buy me a virtual coffee. This directly helps with the monthly server bills and keeps development going.

Buy me a Coffee

Option 2: Do something truly meaningful. I honestly prefer this option. As a father, projects that help children are very close to my heart. If you like this tool, please consider donating a small amount to Kinderhaus Weimar.

Donate to Kinderhaus Weimar

Other Projects

  • HTML to Markdown AI — Free bulk converter for HTML to Markdown, optimized for AI and LLM workflows. Runs entirely in the browser via WebAssembly. No upload, no server processing.
  • DruckZugPro — Free chimney cross-section pre-check calculator per DIN EN 13384-1.
  • PatioPlanner — Plan paved surfaces and calculate stones precisely.
  • My Blog — Homelab, self-hosting and other technical projects.
  • FusePlan — Free browser-based planner for electrical sub-distribution boards. Drag breakers and RCDs onto DIN rails and export a parts list.