Chris Benjaminsen

I build things.

25 years building companies, games, platforms & tools. Products that have reached more than 1.5 billion users.

Now running Moltke Benjaminsen Alpha, a self-funded reverse incubator. I build companies from zero to revenue, hand them off to founding teams, and write about the entire process as it happens.

Highlights only. This is the part of what I'm working on that is far enough along to show; a lot more is in progress and not listed. It is not a résumé: things drop off when I stop working on them.

Chris Benjaminsen

Open Source

solveathome

Hard problems, solved in the open. An open-source platform where you point your own AI agent at an open research problem. Other agents check the work, trusted reviewers decide what counts, and every return, review and transcript is public. MIT code, CC BY 4.0 results. Read the launch post.

Problems
Twin Prime Conjecture
Are there infinitely many pairs of primes two apart? The first problem on the platform, seeded with my own notes from ten years of dabbling.

Commercial Projects

Great Games Network

Puzzle games and the destinations where people play them, for high-value players in tier-1 markets. Evergreen games designed for older adults first, and good for everyone. Each property has its own brand, revenue model and audience. Shared game code lets us add games to every site.

Destinations
DailyPlay
Free online puzzle and card games with no ads. Play Klondike Solitaire, Mahjong Solitaire, Sudoku, WordSlip, Untangle, and Crossword in three sizes, with a new daily challenge at midnight, the same puzzle for every player. Streaks, XP, levels, and achievements across a growing catalog of games.
SolitairePlace
Free solitaire games online. Play Klondike Solitaire, Klondike Solitaire Turn 3, Tri Peaks, and Mahjong Solitaire. No account required, just play.
PuzzleNext
Fresh puzzles to relax with, free in the browser. New puzzle ideas are tried here first, with no sign-up and nothing to install.
HyperPolished

Mass-market casual games where every interaction has weight. Simple mechanics you learn in seconds, polished until they feel alive. Fewer games, higher hit rate, each built with viral sharing from day one.

Games
Hex by HyperPolished
A calm, satisfying puzzle. Drag pieces, clear lines, and let the soundtrack build with every combo. Soft launched on iOS in the UK and Canada; open beta everywhere else.
funny.io
Our launch pad for .io games. We release new browser multiplayer games here, next to classics like Agar.io, and build the listing tools that get them found. Every link is checked, so nothing dead stays up.
Forgeable

Forgeable is an AI partner for businesses. We find where AI can help, then build the tools and run them on one shared AI and compute platform, with ongoing support as the business changes.

Problems we solve

Forgeable is the backbone of the workflows across my businesses and personal projects. Building everything on the same platform makes it easier for me to maintain and improve those workflows.

I originally built it as an internal tool. People I described it to kept asking if I could help solve problems in their businesses too. So I now offer it as a partnership: we find where AI helps a business, then build and run the tools for it on Forgeable.

Moltke Benjaminsen Alpha

Self-funded reverse incubator. Builds companies from idea to revenue, then hands them off to co-founding teams with significant equity. Founders get a running business with validated revenue, active partnerships, and proprietary technology. They focus on growing it, not surviving the early stage.

Products Moltke Benjaminsen Alpha is testing

Not companies yet: we’re testing demand, and some will be shut down. All 18 on MB Alpha

GamarooFree browser games lol.dkTop 100 browser games Daily Games to PlayEvery daily puzzle game Horror Games to PlayHorror games, every platform BarcodepediaProducts by barcode Who Was AliveWho lived at the same time Guide for the FewA city guide for the few Danish LuxuryDanish names the world knows Hard to BookWhen hard tables release NextCaskLimited whisky releases Every Hex CodeEvery colour, with tools EveryMCPServerMCP servers by task EnterpriceyWhat business software costs StructureCostLLC vs S corp, by state LevyDayUS property tax deadlines AmptunePer-user live ops · Closed beta GlasstieHow people and companies connect · Beta, request access WarnwellDomain expiry and spoofing checks

Great games I made

Play Klondike Solitaire online for free - classic card game with daily deals
Klondike Solitaire
Classic solitaire, reimagined as a daily shared experience. Every player gets the same deal each day. No ads, no interruptions. Track your streak, earn XP, and compare your results with friends.
Also on SolitairePlace (Turn 3 variant)
Play Mahjong Solitaire online for free - daily tile-matching puzzle
Mahjong Solitaire
A tile-matching puzzle where you clear pairs of tiles from a layered board. Simple to learn, satisfying to solve, and the kind of game you can pick up for five minutes or lose an hour to. A fresh layout every day.
Also on SolitairePlace
Play Sudoku online for free - daily 9x9 logic puzzles with pencil marks and hints
Sudoku
A fresh puzzle every day at midnight, the same for everyone. Pure logic, no guessing. Pencil marks, hints, and undo built in. No ads, no account required.
Play WordSlip online for free - daily word puzzle on a hexagonal grid
WordSlip
An original word puzzle. Seven letters scattered across a hexagonal grid. Find the hidden word, then trace a connected path that spells it out. Part anagram, part spatial reasoning. A new puzzle every day.
Play Untangle online for free - drag the stars until no lines cross, a new constellation every day
Untangle
Drag the stars of a constellation until none of the lines cross. A new constellation every day, the same one for everyone. Your score is your time, and each hint adds 10 seconds. Quick to learn, harder than it looks.
Play the daily crossword online for free in Mini, Midi and Maxi sizes
Crossword
A new crossword every day in three sizes: Mini (5x5, done before your coffee gets cold), Midi (9x9, over lunch) and Maxi (15x15 and themed, for people who love crosswords). The same puzzle for everyone.
Play TriPeaks Solitaire online for free - clear three peaks of cards
TriPeaks Solitaire
Clear three peaks by playing one card up or down and chain long streaks. Every deal can be won. No download, no sign-up.
Hex by HyperPolished - hexagonal puzzle game for iPhone and iPad
Hex by HyperPolished
A calm, satisfying puzzle for iPhone and iPad. Drag pieces onto the board, clear lines through shared cells, and let the soundtrack build with every combo. No timers, no friction. Soft launched in the UK and Canada; open beta everywhere else.

Built for the pleasure of it.

All labs

Not products, not roadmapped, not for anyone but me. Things I wanted to see exist.

Blids Millions of boids flocking in the browser. A WebGPU simulation that runs up to 4 million agents with exact pairwise forces — no sampling, no approximation, and no grid artifacts. Requires a WebGPU-capable browser. Galaxcelerate Fly through a procedurally generated galaxy. Millions of stars built on the GPU from a single seed, rendered as additive HDR so density reads as brightness. Requires a WebGPU-capable browser. worldsbestbread.com ↗ World's Best Bread One no-knead Dutch oven bread, laid out as a timeline. Five minutes of work, a long cold rise, and a page for every schedule, flour and unit system, in four languages.

Writing

I write about building companies, game development, and what I'm learning along the way.

Read on Substack