AI Sensei

AI Sensei is a tool that analyzes Go games for you. Once you upload an SGF (or GIB, NGF, UGF, UGI) file, it gets analyzed with strong Go AI in our powerful cloud. Then, you can use our intuitive web board to learn about mistakes and how the AI would have played instead. All reviews are permanently stored, so you can study them again and again, or share them with anybody.

AI Sensei is a very efficient study tools, since it makes you focus on the things that matter most: Your mistakes. You can quickly go through the biggest mistakes to learn the gist from your game, and you can always come back for repetition or deeper analysis.

No, we run everything in our cloud, so all you need to get started is an SGF file of the game you want to analyze.

AI Sensei uses KataGo under the hood.

It is very, very strong. Even at the free quality the judgement is superhuman most of the time, although it might misread some positions. The paid versions don't have this problem, but even there might be (very rare) errors. So don’t just blindly believe anything - no matter if you are learning from AI Sensei, a human, or even a book!

There are four subscription levels that differ in analysis strength and length of the shown variations:

You can cancel anytime by choosing "Free" again. You will keep the plan until the end of the period.

Free is for occasional players or to try out AI Sensei. With 50 playouts, the AI should already beat many pro players in a game, but it might misread life & death situations sometimes. Its AI variations are about 4 moves long.

Basic gives you access to high quality reviews for a small price. Using 500 playouts, the AI has superhuman strength and will output variations that are about 10 moves long, depending on the position ...

Dan offers ambitious students a powerful analysis. Its 2500 playouts per move result in very precise and deep reading. The variations are about 15 moves on average, sometimes even longer.

Pro is intended for the most intensive Go training. Using 10000 playouts, it will give you variation lengths of about 18 moves on average.

The sample game links above show the same game analyzed with all levels, so you can compare the differences for yourself.

So which one should I take now?

When in doubt, just start with Basic. It's really good already. Then you can always upgrade if you need more.

Yes. While we may enforce some upload limits to prevent abuse, they won't affect any reasonable usage.

It usually takes only a few minutes, even for high quality reviews. We can achieve this high speed by using up to 10 of the best available machines in parallel to review a single game.

Yes, you can just open the website in your browser, on any device. You can even add it to your home screen: If you use Google Chrome, there will be a "Download App" link in the navigation menu, but browsers like Firefox and Safari allow doing this by hand, too. After logging in, you can access all your reviews or upload new games. It’s really cool being able to analyze your tournament game right after it finished!

It's easiest to use the "Share" button in your game and send the link to your teachers, opponents, and friends. They can access the review without requiring an AI Sensei account.

(On Mac, use the Command key instead of Ctrl)

AI Sensei is developed by Benjamin Teuber, Erik Ouchterlony, Max Dohme, and Vitali Henne.

We are looking forward to hearing from you, be it for praise, critique, ideas, or bug reports. You can either use the "Give Feedback" button in the site navigation bar or write an email to [email protected].

Yes, we're happy to give away free voucher codes and offer reduced subscription rates if you help promoting AI Sensei in exchange. Feel free to contact us at [email protected].