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I Built a COMPUTER in Magic: The Gathering

I Built a COMPUTER in Magic: The Gathering

Because Science
3 HN recommenders · discussed 2019–2026
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About this video

Kyle Hill of Because Science explains and demonstrates, using real cards, how Magic: The Gathering can be used to build a Turing machine, a computer inside the card game.

Why it appears in the archive

HN links it as the accessible, hands-on demo behind the claim that Magic is Turing complete.

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From the Hacker News discussion

lukifer · 2020-04 · rec

For anyone curious about the details of building a Turing machine in MtG, Because Science did a thorough breakdown and demonstration, using actual cards: [VIDEO]

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bentona · 2023-12 · rec

Here's a demo: [VIDEO] Didn't realize this before watching, but it's interesting that there's an incredibly complicated board state but the game state / actions are deterministic, e.g. the players don't have any choices about what to do once the machine is set up.

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mckn1ght · 2026-06 · rec

Someone made a video based on the paper, if you want to see the cards being used and a little more explanation: [VIDEO]

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cyberfart · 2019-11 · reference

Related to your comment, here's the paper [0] and Because Science recently made a video about how such a game would look like [1]. [0] [LINK] [1] [VIDEO]

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