Chaos Singularity 2021

Cosin is a yearly chaotic event in Switzerland. The content ranges from technical and political, to social and cultural.

The CoSin 2021 is cancelled!

IRC: #cosin

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The CoSin 2021 is cancelled!


CoSin is a non-profit event, but we ask for an entrance fee of CHF 30 for all three days to cover our costs.

The entrance fee cover all four meals (see below). You can pay on site at the entrance.


You can register and get a ticket online:

Registration CoSin 2021

Registration beforehand is not strictly necessary. You can just show up and participate if you like. However, we are grateful for everyone who registers in a timely manner. This helps us with planning the event and cooking appropriate amounts of food.


A warm dinner is provided for all participants on both Friday and Saturday evening. On Saturday and Sunday morning there will be breakfast available. The costs for all meals are included in the entrance fee.

When signing up please let us know if you are planning to be here for Dinner on Friday evening.

The registration includes a form for people with allergies and those who prefer to eat vegetarian or vegan food. We will also make sure to label all food appropriately.

For those who like to bring their own food, there will be a barbecue grill at your disposal on Saturday evening.


Local beer and Club Mate and also some soft drinks can be purchased at the cash desk.


Sleeping at CoSin is possible, all you need is a sleeping bag and a camping mat.

Assorted stuff

Bringing your computer

If you like to bring your computer, that’s fine with us, in fact we encourage you to bring at least a laptop. However, all responsibility for such material is taken by its owner. There is only limited electric supply, so please leave your supercomputer at home and bring your notebook.


Using the internet

There is internet access with limited bandwith available. File sharing and illegal activities are not allowed, the line is provided by a private person which could be held liable.


Because of our limited space, please note that CoSin is not a lanparty. This doesn’t mean we’re generally against games, but we think that there are enough Lanpartys in Switzerland already.


Give non-smokers a chance. Do not smoke inside the house.


Most of us value their privacy. Therefore, please do not take photographs of people without their explicit consent.