As a heads-up to the Chess Mentor people:

There seems to be a large number of duplicated lessons in the area of endgames.

For example: There is a lesson entitled "Basic Opposition". This appears to have been repeated 22 times. Here are the lesson numbers.

EOT037
EOT040
EOT044
EOT048
EOT053
EOT055
EOT063
EOT067
EOT072
EOT078
EOT084
EOT108
EOT126
EOT132
EOT135
EOT143
EOT152
EOT157
EOT169
EOT177
EOT187
EOT193

I'm working through the lessons sequentially. I had to do the exercise 22 times in order to get to the other lessons.

I think I've mastered basic opposition now.

Patzer24 > If the problem was different each time , or if it was more complicated, I'd agree. But it only consists of a white king on d3, a black king on d6, and the solution is to move the white king to d4.

There ARE other opposition problems in the program as well, but this particular problem is duplicated in what appears to be an unnecessary way.

The problem is still there 3 years later.  Can't you just delete the duplicates?  There are a zillion of them in Silman and Arne's course: Endings, Openings, a Taste of the Middle.  I'm enjoying the course and don't want to miss any lessons, but there are so many duplicates it's overwhelming.