# Progress with calculation skills

Since a few days I'm working on "tactics that I always got wrong". With that option it is great to see my calculation improvement over the years (2012-2016).

Here's a not so easy puzzle that I got wrong in the past.

Now I first saw a rather tempting, but failing idea, and after some more thinking I found the elegant solution, which involves a beautiful checkmate.

**Here it is as a puzzle first, for you to try :**

**Let's have a closer look at the failing variation :**

**And now see here the correct solution :**