Woman playing solitaire, cropped view of hands and cards
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May 18, 2015 5:13 PM EDT

Microsoft has challenged the world to a Solitaire tournament that will pit the company’s strongest players against the game’s biggest fans.

The tournament will launch on June 5 to mark the 25th anniversary of the game, which has long remained a permanent fixture of the Windows operating system.

The battle begins with an internal match among Microsoft’s employees. The winners will then lead a worldwide match against the general public, or as Microsoft put it in an official post: “you’ll be challenged to bring your best to defeat our best.”

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