English
简体中文繁體中文English日本語한국어ไทยTiếng Việt
Download

Free & open source · Powered by KataGo

Every game you playis worth understanding.

Open a game and KataGo finds the moves that decided it.Review, practice and AI commentary, all in one app.

Download free See how it works
  • Windows · macOS · Linux
  • Unzip and run
127 1 2 3 4
Black win rate · whole game
Move 127
KataGo’s top choice · E18 41.0% White win rate · Visits 999 Move 128 in the game was played here too

The real app

The whole game on one screen.

Win-rate swings, KataGo’s suggestions and the moves that mattered, side by side. No clicking through move by move.

The real LizzieYzy Next window: the whole-game win-rate graph and problem-move list on the left, KataGo suggestions on the board in the middle, and the suggestion table and an overview board on the right.
Game: Honinbo Shusaku’s “ear-reddening game” (1846), move 127

  1. Whole-game win rate

    See where you led and where it slipped away.

  2. KataGo suggestions

    Each point shows its win rate and visits, so you can compare at a glance.

  3. Problem moves

    Sorted by how much they cost. Click one to jump there.

Everything a review needs, in one app

From finding a game to understanding its key moves, the essentials work out of the box.

  • Win-rate graph and problem moves

    See how the whole game swung at a glance. The costliest moves are listed for you; click one to jump straight there.

  • Suggestions you can read

    Every suggested move shows its win rate, visits and score lead. Play out the variation and compare.

  • Fox games by nickname

    No account number needed. Enter a Fox nickname to find recent public games.

  • Lightning overview

    Analyze the whole game in one click to see the big picture, then use “Whole-game deep analysis” where it matters.

  • Board sync

    Recognize the board in Fox and other Go clients and analyze it live (Windows).

  • AI Coach and AI Commentary

    Play practice games against AI at the strength you choose. Connect an AI service and it explains what each move gains or loses.

  • Ready out of the box

    Complete packages include the KataGo engine and a default network. Unzip and open; the first launch sets everything up.

AI commentary requires your own service connection. Provider usage limits and fees apply.

Start reviewing in three steps

No jargon needed. Just follow along.

  1. Open a game

    Open a game file, or enter a Fox nickname to fetch recent games.

  2. Analyze in one click

    Choose “Whole-game lightning overview” and KataGo charts how the game swung.

  3. Understand the key moves

    Jump to the problem moves and compare them with KataGo’s suggestions to see what went wrong.

LizzieYzy Next

Pick your version and start

Choose the build for your computer, unzip and run. More versions and install help are on the download page.
Loading the latest stable release…

Windows

Use CUDA for NVIDIA RTX 20 / 30 / 40 / 50; RX 9000 can try ROCm, while other graphics should use OpenCL

  • NVIDIA CUDA Recommended

    One build for RTX 20 / 30 / 40 / 50

    —

  • OpenCL compatible

    AMD / Intel graphics

    —

  • CPU universal

    Works without dedicated graphics

    —

macOS

Choose the build for your Mac chip

  • Apple silicon Recommended

    M1 / M2 / M3 / M4 / M5

    —

  • Intel chip

    Older Intel Macs

    —

Drag the app to Applications after downloading

Linux

Linux builds for CPU, OpenCL and CUDA are on GitHub.

Get Linux builds

All versions & install help

Your next game starts with understanding this one.

Free to download. Unzip and start reviewing.

Download free

A clearer view of the board,a calmer next move.