Tonino Tarsi writes:

Task 3 of the Monte Cucco International Trophy 2018 was a photo
finish one between Alex Ploner and Tom Weissenberg. As it was not clear who won
the task the two pilots asked us to analyze all the tracks available. Both Alex
and Tom own an Oudie and Alex also had a Compeo track log. The analysis we did
was very tricky and this is intended to share the results and doubts left
concerning the subject.

First, we calculated the score using the two Oudies (the pilots' primary
instruments). Result was that Tom won by two seconds:

Tom: 15:43:11

Alex: 15:43:13

Then, we used both Flymaster tracks :

Tom: 15:43:14

Alex: 15:43:14

To add to the confusion we also imported Alex's Compeo track:

Alex: 15:43:16

According to our local rules (primary instrument is the pilot instrument, in
this case the Oudies) Tom won the task.

Then we tried to compare Alex's tracks from the three sources we had: Compeo,
Oudie, Flymaster tracker. Comparing Compeo and the Flymaster tracker resulted in
very similar tracks with less than 10-20 meters maximum error, but comparing the
Flymaster Tracker with the Oudie we got a lot of areas with very big errors (up
to 300 meters). This looks very similar to the problem Tom had with his Oudie in
Macedonia and it looks like Alex's Oudie suffers from the same problem.

If you want to analyze the problem here are the tracks :
https://www.vololiberomontecucco.it/Cucco2018/tracks_oudie_FM.zip

https://en.wikipedia.org/wiki/Olly_olly_oxen_free