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I Built a COMPUTER in Magic: The Gathering

I Built a COMPUTER in Magic: The Gathering on HackerTube: recommended by 3 Hacker News commenters across 3 separate months, 2019–2026.

Because Science

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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 Hacker News recommends it

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

people recommended it
3
separate months
3
strong recommendations
0
discussed on HN
2019–2026
“Because Science did a thorough breakdown and demonstration, using actual cards”
— lukifer, Apr 2020, in “Accidentally Turing-Complete”

What HN commenters said

4 Hacker News comments link this video. Each one links back to its thread.

mckn1ghtJun 2026Recommends

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

in “MTG Bench: Testing how well LLMs can play magic” · View on HN

bentonaDec 2023Recommends

Here's a demo: ▶ this 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.

in “Magic: The Gathering Is Turing Complete (2019)” · View on HN

lukiferApr 2020Recommends

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

in “Accidentally Turing-Complete” · View on HN

cyberfartNov 2019Cites it

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] ▶ this video

in “My Kid Lost a Game of 'Magic' to Its Creator But Scored a Piece of Its Art” · View on HN

Topics & tags

Computability & complexity theoryChess, board games & puzzlesturing machinemagic the gatheringcomputationcard gamesemergent complexity