Controversy in curling: What the rules say about 'burned' rocks

As if losing the first three games of the Olympic women’s curling competition wasn’t hard enough on the Ottawa-based foursome skipped by Rachel Homan — and it certainly is well beyond frustrating for the pre-tournament favourites and reigning world champions — Friday’s “burned” rock controversy sparked more controversy.
Here’s a primer on what happened, including what the rules of curling say about the situation.
Incident report
• With Denmark