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Playful thinking

You have a grid of squares, some light and some dark. Your aim is to light all the squares up at the same time. You can choose any square and flip its state from light to dark or dark to light, but when you do so, other squares around it change state as well.

Each square contains a small diagram showing which other squares change when you flip it.

Play it here, or download it.

This entry was posted on Saturday, May 22nd, 2010 at 12:00 am and is filed under Playful thinking. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

2 Responses to “Playful thinking”

  1. Augusto Says:
    December 19th, 2010 at 12:28 am

    Hello, I wanna know the real name of this game and if there’s an algorithm to solve. Thanks

  2. Jan Nordgreen Says:
    December 19th, 2010 at 5:21 pm

    I did a Google searh for

    algorithm for flip simon tatham

    and came up with

    http://gaming.stackexchange.com/questions/11123/strategy-for-solving-lights-out-puzzle

    and other sites you may like to look at.

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