Chasing start of the Natt-Cup ranking. I was starting 3:30min after the first runner and was from the second control on together with 3 other guys. It went pretty well until control 11, but after that I lost 7 minutes until the finish. I was very tired, became problems with my stomach and was not really able to concentrate anymore. I ran to the wrong controls even I knew where I was and had no motivation and power left. To control 15, I had to go on the toilet, which didn't help, sadly. After that, I was nearly at my control but then (I don't know why) decided to run already to control 16 and forgot about control 15. After 200m I remembered that I forgot control 15 and had to run back. I was really done with the world. With a 6th place in the end, the result was still quite good, but for me the competition could have end already at control 11.