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Known games

Sim — don't make a triangle

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Six dots, every pair joined by a line. Players colour lines in turn, and whoever first makes a triangle of their own colour loses. With six dots, a triangle always comes, so somebody must lose.

From Sim, a pencil-and-paper game by Gustavus Simmons.

What it shows a designer

A game about avoiding, not achieving. It shows a misère goal, and a mathematical guarantee: with six dots someone must make a triangle, so the game always ends.

Credits

Made by
Gustavus J. Simmons, 1969
Sources
gamescrafters.berkeley.edu/games.php?game=sim
en.wikipedia.org/wiki/Sim_(pencil_game)

What you need

  • paper
  • two pens of different colours

How to play

  1. Draw. Draw six dots in a circle and join every pair with a light line: fifteen lines in all.
  2. A move. Take turns going over one uncoloured line in your colour.
  3. Lose. If the three lines between any three dots are all your colour, you lose at once. Crossings in the middle are not dots.
  4. Again. Play several games, taking turns to start.

After playing, talk about

  • When did you run out of safe lines?
  • Is it better to go first or second?
  • How does a game where you avoid something feel different from one where you chase it?

Its blocks

Download it as a design (.md)

In boardgameBuilder, Open game puts its blocks on the canvas. Changed, the same file can come back here from Propose a game.

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