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Work, interests & experiments

Startups, hobbies, some thoughts, and the shelf of small projects.

Explore the projects

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Work / Petrus Labs

Advising startups.
Investing in some of them.

Through Petrus Labs I advise and consult for startups — the main thing I do, and how I come to know the companies I end up investing in.

More about my work
Play / Practice / Figure it out

Latest projects

All 19 projects
  1. Battleship

    Ten by ten, five ships, one shot each turn. The opponent counts where a ship could still be and fires there.

  2. The Opposition

    Two kings on an empty board, and one move that decides it. Five to choose from, four of them lose at once.

  3. Blackjack Count

    Keep a Hi-Lo count through live hands, or race through a deck with four cards missing.

  4. Crokinole

    The Canadian flicking game. Twelve discs each, eight pegs, and a hole barely wider than a disc.

Beyond the day job

A few other interests