OBK File

What are OBK files and how to open them

Are you having problems opening an OBK file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your OBK files.

What is an OBK file?

OBK files have multiple uses, and Chessmaster Opening Book is one of them. Read more about the other uses further down the page.

Chessmaster Opening Book

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open OBK files

Important: Different programs may use files with the OBK file extension for different purposes, so unless you are sure which format your OBK file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested four different OBK openers which you will find listed below.

Last updated: May 19, 2024

All known file formats using extension .OBK

While Chessmaster Opening Book is a popular type of OBK-file, we know of 2 different uses of the .OBK file extension. Different software may use files with the same extension for different types of data.

The Chessmaster 4000 Opening Book

We know that one OBK format is The Chessmaster 4000 Opening Book. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Various apps that use files with this extension

These apps are known to open certain types of OBK files. Remember, different programs may use OBK files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about OBK file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.