PGN Zstd Unzipper

This Python script allows you to decompress Zstandard (Zstd) compressed PGN files.

Overview

This project provides a Python script to decompress large Zstd-compressed PGN files. It utilizes the Zstandard compression library and can be run from the command line. Works on databases from lichess.org, chess.com and many others. Max file size: 1gb. NOTE: Uncompressed files are around 5-6 thimes the compressed file. Make sure you have enough space accordingly.

Requirements

• Python 3.x
• Zstandard library (install with pip install zstandard)

Usage

1. Clone the repository or download the script.

2. Ensure Python and the Zstandard library are installed on your system. Use pip install -r requirements.txt to install if needed.

3. Open a terminal or command prompt and navigate to the directory containing the script.

4. In the script replace : Input_file and Output_file paths with your desired paths

5. Run the script with the following command:

   python unzipper.py