Anyway, here's the tutorial. I've made it with double crochet (US term), but it can easily be adapted to any stitch size. If you have any problems or questions, don't be shy, I'd be happy to help.
2. Yarn over and pull a loop through the first chain (just like if you were making a double crochet stitch).
But in stead of finishing the double crochet stitch, pull another yarn
through the loop closest to the tip of the hook, to make another chain
4. Then finish the double crochet stitch like normal.
5. You now have double crochet stitch with an extra chain at the bottom.
Yarn over, pull loop through the extra chain, pull yarn through this
loop and then finish the double crochet stitch. Repeat this until your
row is long enough.
Now we are starting to see a pattern, right?
Here's what a (small) no foundation chain row looks like.
Visto en http://www.wardi.dk/2008/05/no-foundation-chain-crochet-tutorial.html