Combinations I didn't see

Here a new tactical series: what the computer showed me in less than a second about a game on which I spent at least 4 hours. Or even worse positions where my opponents asked right after the game: why didn't you play this and that move.

Position 1

In the lead for most of the game and not able to finish off my opponent. Still that bad taste in my mouth...

Here, the computer finds immediately the "easy" win

To be continued...

I hope that I won't have to post too many positions in the near future.