Kaighn Kevlin · New York City

I build toys to win arguments.

I'm a software engineer in New York. Here I write essays you can play with: a sudoku proof that settled a camping feud, a 50-year housing simulator, a ladder of game AIs to beat. Usually because someone was wrong. Occasionally it was me.

Start with the latest
10
posts
7
you can play with
1
argument won, technically
The World's Hardest Sudoku Planet Wars Monopoly Was Rage Bait: The Case for Taxing Land

Latest

Interactive

The World's Hardest Sudoku

I went camping and got in an argument about whether you ever need to guess at Sudoku. This page is my rebuttal.

Read & play

More writing

All 10 posts
Launch

Announcing: Call Roulette
Interactive

Planet Wars
Launch

Announcing: OnlyKaighns
Interactive

Monopoly Was Rage Bait: The Case for Taxing Land
Interactive

Connect 4
Essay · 5 min

Kaighnbot - using claude code as open claw to manage my social life, annoy my friends, and profit!

Side projects

All projects

Call Roulette

Live

Spin a wheel, call a friend. A tiny installable web app that picks someone from your contacts so you actually keep in touch.

Housing Simulator

Live

An interactive simulation modeling housing markets, zoning policies, and their downstream effects over 50 years of NYC.

Kaighnbot

Write-up

Claude Code on a MacBook in the corner of my apartment, texting my friends, making plans, and running my calendar.

About

Duke math & CS, now living in a fifth-floor walk-up. I see the world in incentives and game theory, but I'm a big feeler. I write about everything, from economics and AI to the hard, personal stuff.

More about me