Quoridor is a two-player abstract strategy game. Race your pawn to the opposite side of a nine-by-nine board while spending ten walls to lengthen your opponent's route — but never to block it completely. TheQuoridor.com lets you play in the browser against a range of AI difficulty tiers or against another person, with no account required to start.
Games run entirely in the browser with nothing to install. You can play a bot, play live against another person, or start with the written library below and come back when you know what a wall is worth.
Seven engines, from a deliberately gentle beginner to a research-grade opponent and an experimental neural network. Each one has an honest write-up of how it plays — including where it is weak. The full roster compares them side by side.
A written library that starts from zero and goes deep: the complete rules, a beginner's guide, and strategy articles on walls, tempo, traps and endgames.
Write-ups of how this site's engine actually works and how the bots are measured — including the parts that went wrong.