Onno Chess Software : Download

How to Download

Onno is commercial software. Before you can download anything, you have to buy Onno.

The download requires authentification.

If you already have an account for the same email address, e.g. from a previous purchase, I do not set up another account and do not update the password by default. That means, your password is your first order number. If you want an additional account, want to update the password, or just forgot the password please contact me.

After your purchase, you can download the latest version of Onno instantly from share-it. Access to this download area has to be granted manually and will take some days (at most a week).

Multi Processor Update

Download onno-1-2-70.zip.

After unzipping the update, you have to copy your license file into the directory where the engine, deep-onno-1-2-70-w32.exe is located. License files are available only by purchase at share-it.

Onno for Linux

You can download an experimental native Linux x64 version here. It consists of a single executable file. Just unpack with bzip2, set the executable flag, and put into the directory of the Windows version (which you have to buy).

Please note: The Linux version was compiled with gcc, which gives a poor performance. For this reason, the Linux version is about 10% slower then the Windows x64 version. Please do not publish benchmarks based on the Linux version (or at least clearly mark as the weaker Linux version).

I do not provide a 32 bit Linux version. Please use the 32 bit Windows version with Wine.

Opening Book

By request of the book auther, I no longer provide an opening book. I am sorry for this.

Old versions

Here you can find old versions of Onno for download. They still require a valid license file. License files for one version are also valid for all earlier versions.