This is a Matches puzzle from the French Puzzle Championship - 2008. Rules of Matches The grid contains matches, which can be completely brunt, partially brunt or completely unbrunt. The matches will burn from the head (rounded end) to the tail, without skipping any segment. The number outside the grid indicate the number of burnt segments in the corresponding row /column. Example: One sample problem is ... The unique solution of the above problem is Some other sample problems are following. 1. Thermometer of grid 5 x 5 2. Thermometer of grid 7 x 7 3. Thermometer of grid 8 x 8 If you solved the problems. Post it below. Thank you!!