You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

sdk-pytest-checkmate
0.1.0a4

This version was deleted from PyPI around 2025-10-25. Installing fails with:
$ pip3 install sdk-pytest-checkmate==0.1.0a4 ERROR: Could not find a version that satisfies the requirement sdk-pytest-checkmate==0.1.0a4
View other deleted versions of sdk-pytest-checkmate

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-10-24/ \ sdk-pytest-checkmate==0.1.0a4
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
sdk_pytest_checkmate-0.1.0a4-py3-none-any.whl (18.4KB)
sdk_pytest_checkmate-0.1.0a4.tar.gz (31.9KB)